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Network problem (possibly DHCP)

Q: Network problem (possibly DHCP)


I have this problem with a computer i'm trying to fix for my dad. This computer is used at his job, and its exposed to _a lot_ of dust. (not sure if this has anything to do with it, but there's a possibility)(also, the cooling rib for what i believe is the graphic processor was badly installed, and fell off as i opened the cabinet. I have put it back on with heat-carrying paste, and i still have a normal image on the screen, so i think it works...)

A bit about the specs, as far as i can remember them:

2 GHz Intel Pentium IV
512 MB RAM
AOpen motherboard
Sound, network and screen cards are on the motherboard
Running Windows XP Home

So all and all, a decent computer. This computer did have some spyware when i started looking at it, but it should be taken care of, as i bought Norton Internet Security 2006 and ran a full scan (i did not get to upgrade the definitions, reason for that will follow).

Before i installed it, i had arranged it so that the wireless network and internet worked on the computer. When i got back the day after, to install the Norton package, i noticed a lot of spyware, and took care of it. The computer was acting really slow for its specs, but after cleaning up a bit it works better. Now here is the problem: After i installed Norton Internet Security, the internet & network stopped working! Here's what i know:

Both the connection for LAN and WLAN contains protocols for Netware and IPX (even the new WLAN card that i bought did). They have DHCP turned on, but still neither of them recieves any IP! The error message "This connection is limited" has shown at an annoying rate. (due to it not recieving any IP). I have tested my router, and it gives IP's to every computer but this one. I also tried to give the computer in question an assigned ip within the routers IP-range, to see if i could connect to anything. Then, the "connection is limited" error went away, and i could ping the router, i could ping the other computers in the network, i could even access them with nbtstat. So i opened my internet explorer and typed the router's ip adress in: Nothing. This page can not be shown. And also, when i typed "" in the adress bar, and pressed enter, it changed to something like "http:///?%20192.168.2.1/". dunno if this is important

I also tried connecting the computer directly to the DSL modem and connected fine using PPPoE, (connection accepted, all that stuff), but still i could not access any web pages, i couldn't even ping them.

So that is my problem. Hope for some help!


Preferred Solution: Network problem (possibly DHCP)

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A: Network problem (possibly DHCP)

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I am using a Westell Wirespeed 2100 DSL modem, and a D-Link DI-604 Ethernet Broadband Router. The Westell is set as "bridged ethernet", and the D-Link is set for PPOE. The reason for this is I need to connect multiple computers to this DSL connection so I am using my D-Link Router for that purpose. The D-Link is actually making the connection with PPOE.

Two computers are connect to the D-Link.. a Windows XP machine and a Windows 2000 machine, each are set to automatically receive an IP. When these PC's receieve an IP it is indeed in the range that I specified on the D-Link's DHCP settings (.101 and .102).

The Westell modem is connected by CAT5 from its WAN port to the WAN port of the D-Link. The Windows XP machine and Windows 2K machines are connected to ports 1 and 2 on the D-Link (note: I have tried others such as 3 and 4.)

The problem is this. If the Windows 2K machine is connected to the D-Link, the D-Link's lights would go off and I would see "network cable unplugged" then the lights would come back on, almost as if the D-Link was restarting itself. Then I would lose Internet connection on both machines for about 15 seconds until the D-Link started back up. This only occurs with TWO pc's connected to the D-Link at once, but not one.

I updated the firmware after trying multiple things to fix the problem and then the problem started occuring about every minute instead of every 20 minutes or so.

Note: For a few months ... Read more

A:Problem with Router (possibly due to DHCP?)

Make life easier on yourself:
In your router-setup (WAN - ISP or the like) change the protocol to something like: "Fixed IP"
Under LAN disable the DHCP-server

On both your PCs under Network settings, change the Local Area Connection/Properties, ONLY the Internet Protocol(TCP/IP) Properties to read as follows:

Use the following IP-address: ( or 102, etc.)
Subnet mask:
Default gateway: the IP-address of you D-link router

Use the following DNS...
Preferred DNS: same IP-address of D-link router as default gateway
Alternate DNS: leave blank or put in the first of your IP's DNS-servers

PS: I use a Billion BIPAC 640AE Firewall/Router so my setup might be different from yours

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im having trouble connecting to my freinds belkin router across the street when using my new Dlink AP.
When using my laptop in a cirtain position i can connect and it recieves a ip from router okay.
Problem is i want to pick this signal up using this the Access point and boost it around my house.
When i log into the access point it shows that the router is connected to my access point okay so far. Problem is that it does not ever get an ip from the dhcp server. the router across the road has dhcp enabled and like i said earlier, the laptop gets an ip okay and connects to the net ..

My access point is a DLINK DWL 700p 802b and the remote router is a newer 802g..
I have MY AP configured in repeater mode using the routers mac. I dont know if i would be better off using accesss point mode or client mode because i dont know what there for..

So basically when using ap, laptops stuck on aquireing ip.... any help would be great...

A:Aquiring network ip from DHCP problem

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I am having a problem with an NVDIA network connection. The network is MB based 750i chipset.
After the latest batch of updates certain sites will not display certain objects. I have found the easiest test site is YouTube where the video previews are blank and the initial flash eventually pops up Connection Reset By Server. Google and other sites without this kind of information work fine. Also the Pandora Gadget does not work.

If I allow the adapter to use DHCP I have the problem, if I manually set the IP with the exact same information the connection works fine. I have pulled drivers out, updated everything, reinstalled drivers... used netsh int ip reset and netsh winsock reset. I'm not running anything except the windows firewall - that I know of.

I had this problem in Vista x64; but after going through everything eventually it started working. I originally though it was caused by VitrualBoxes Bridging adapter. I could actually get it working check the Bridging Adapter and cause it to behave exactly like this. However, unchecking it did not always fix it, it sometimes required reinstalling the drivers.

My x32 installation (this is a dual boot machine) doesn't have VirtualBox installed. I'm guessing it's something behind the scenes in the bindings; but I'm at a loss.

Any help would be appreciated.


A:NVDIA Network Problem only when using DHCP

Hi sulldawg,

Welcome to Vista Forums!

Although it sounds like you did some of this, please go to and follow the instructions in: Network Posting Tips. Even those parts you already did (at least some of them), do so again using the batch file to make sure it includes everything (and it can't hurt to do it again).

When creating the IPCONFIG /ALL screenshots, please do so both with and without using DHCP so we can see how they differ when it is and isn't working (you may need to include multiple images to capture everything and please be sure to label the files so we know which ones apply to which circumstance).

Thank you and good luck!

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Hi all

The nightmare begins: I turned my computer on last night and my interweb had broken!!! It was working the day before and for a good 6 months prior with not a hiccup. I've noticed that a million and 10 people have a similar problem.

I have a professionally set up simple home network between my own computer (Dell Inspiron Windows XP SP2) and my brothers Dell laptop (Windows 7). Brothers laptop WILL still connect to the internet fine.

We run a Dynalink ADSL2 Router to an 8 port Switch and then to our computers - yes, we use cables!

I'm on my work computer at the moment.

My computer still seems to be able to talk to the modem, it will detect an IP address and Subnet mask but then when it starts to locate the DNS is just gets stuck on 'Aquiring Network Address' for 5 minutes and cuts out with 'Limited or No Connectivity'. The latter being the case.

I am getting a 169.254.x.x IP address though. My brother's is totally different, starting with 198.... My subnet mask is

I've run every antivirus and spyware scanner I have. No baddies detected.
My Detect IP are all set to automatic. Everything is ticked where it's meant to be.
I have Enabled the NetBIOS whatsit.
DHCP is enabled.
I've 'Repair'ed till I'm blue in the face.
I've tried several different ports in the switch in case one was faulty.
I've done all the shutting down and starting up in sequence.
I've tried switching off fir... Read more

A:Acquiring Network Address - can't locate DNS/DHCP problem?

It could be a driver problem, so install the latest for your ethernet or do the System Restore you mentioned.

You are right to try different switch ports; best to (temporarily) use one that you know is now working. Same for the cable--make sure it is good by testing with another computer.

If you have a non-Windows firewall it could be corrupted so best to test by un-installing it and running the Removal Tool if one is provided.

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hello. Recently my aim has been acting up a bit, and i'm not sure whether its a problem with AIM itself, or my internet connection. Nothing had changed as far as settings, connections etc. - but about every 20 minutes to hour or so my AIM signs off, and then on again ... usually it only takes a second or two but its been going on for over a week and i'm getting awfully sick of the windows piano playing when it occurs, as well as my conversations being interrupted.
Has this happened to anyone before? i've turned off my firewall, i've removed then re-installed AIM ... i've switched connections on my router in my apartment but nothing is working. i should mention i have 2 room mates, and neither of them are experiencing this problem. and as far as i can tell i'm not fully losing connection to the internet - but it happens so fast that i have not ruled that out. Hopefully someone can help, thanks!!

A:Odd problem with AIM, possibly network


Greetings. I too had this problem. Are you by chance running
AIM 5.9? I had 5.9 and it kept kicking my kids totally off after
chating for about ten to twenty minutes. Did everything under the
sun. Nothing worked. I had to uninstall 5.9 and google a down load
of AIM 5.5. Did that and everything is great.

So- uninstall from add/remove programs- Both AIM and the tool bar. Then delete the AIM folder and AIM Tool bar in C:\Program Files
Then go to the run command and type in %temp% and hit ok.- Delete all those files. Restart the computer and google for a 5.5 download. Install
and you should be good to go.

I suspect it has to do with a conflict with a MS update or something.
My error (when I checked the log) was specific to the ntdll.ll module.
Search for solutions failed miserably. Anyway- good luck and post back
and let us know how it worked.


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We are using  a DHCP Server,for our network we musst create new DHCP,how to add new DHCP and activate the scopes for

can someone give me some tips.

Thanks a lot.

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I have had a task dumped on me and am a little out of my depth.

We have a new EFM service, which is connected to a RAD Network termination Unit; in turn this is connected to a Cisco 887VAM router, which in turn is connected to a TP-Link TL-SG1024 switch.
I can connect any computer to the switch and can connect to the internet as long as I assign each one of the 5 static IP addresses I have.
How do I get it so that I can connect more computer and have them detect a generated IP address?
I gather this is to do with DHCP at the router but I don't know where to start.

Any help?


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Dear All,

I’m having some problems with my Wireless network.
I’m struggling to get my wireless devices to connect to my wireless network. The only way I can seem to do it, is by assigning them an IP address manually – otherwise they get given a 169.xxx.xxx.xxx number.
Ideally, I want the devises to get the IP address automatically.

Look at the diagram to see my network.

It’s not a secure network – I haven’t given the Wireless Router any Mac Addresses. I live in a very remote area, so I’m not bothered about security until I have it all working.

The wireless Router has 4 Earthnet Ports and 1 ‘Internet’ Port.

My ADSL Router has all my Internet settings
(Both are Netgear)

My question is: How do I get my Wireless devices to collect automatic IP addresses?

Hope you can help.

A:Wireless Network - DHCP - Help

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Hello, seem to be having a rather serious issue with my laptop lately. It seems to be occasionally going through a sort of crash. First it "stutters", locking up, unable to move the mouse, if audio is playing it will loop. Then it just resets itself, as if crashing. There's been no consistency on to what causes it, or how often. Playing a Youtube video, running a virus scan, trying to reinstall the network driver, or even just trying to open up the network center in control panel. Sometimes it will go ten minutes, sometimes a couple hours before resetting itself. When it comes back, I no longer have any wireless network capabilities, and the network driver is missing. The icon displays a box, rather then a wifi symbol, with a red 'x', and says "No connections available". Resetting it again seems to fix it, but some times it takes a a few tries. And sometimes it seems I lose just my wireless network capabilities, without a crash (something that happened while writing out this post). The icon stays a wifi symbol, but with a red x. No one else in my household is having any issues, and my phone connects just fine. I tried uninstalling and reinstalling the wireless driver, but that doesn't seem to work. I reset the modem, of course, but that didn't solve it. I ran a diagnostic with the Dell Support Assist, but it said it passed and detected no issue. Only solution I've found seems to be to restart it, and hope it takes a while before it ... Read more

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The Server went down - it is at shop for repairs. Meanwhile everyone can acecss internet fine - router is the DHCP and DNS server. However today one computer on the network is getting an APIPA address and can't ping the default gateway or any other computers on the network. Loopback ping works and device manager indicates network card is working correctly. Checked cables. Uninstalled and reinstalled network card. Rebooted several time. Anyone have any idea what to try next? All other computers on the network are accessing the internet just fine.

A:one computer on network can't get to DHCP server

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Hello Everyone,

We our setting up a Training Company to assist unemployed IT people in the Silicon Valley area of California. Our group is very small and having a hard time even getting our network here started. Here is the problem: We have Windows 2003 Server Enterprise 180-day usage disc (from a book we bought to learn). We have 5 static IP addresses leased from DSL carrier. They are for example: thru with a gateway of [these are only IP numbers used for example to prevent hacking] my subnet mask is We tried and tried for 2 weeks now and still can not get the complete network to work. We need: Step1.) The server to be secure with a firewall (but willing to forgo that and add later) Step2.) the server to issue Ip addresses from a pool of thru 12 to 3 workstations running XP(we decided to make the server, subnet mask is and gateway Step3.) Have access to the internet on all workstations and the server too. All we have succeeded to do is get the dhcp to issue out addressses to the workstations and even that i think we got lucky. We think the problem is somewhere you need to tell the (maybe iprouting?) setup that the Public ip address is the and gateway, subnet info and to route to the server PRIVATE ip address
Thank you for any help. We are on very limited funds here and appreciate any help. My number is 925-984-9907 if you wish to call. We wil... Read more

A:DHCP Server using (1) Network card

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I am really suck with my network. I live in a shared house and the landlord seems to have no idea so I'm having to take control, though as you'll quickly notice I dont have much clue either.

We have a Virgin internet router downstairs, provided by thembut the wireless signal hardly passes the room, so there is a cat 5e cable through the wall, upstairs to a router that I have installed DD-WRT on, that we then intend everyone to connect to wirelessly, though some are wired.

I have put the cable from the Virgin box into the Linksys normal bit (not the one that you usually put the internet one in), but I have no idea what to do now. I've tried searching but all I can find is if I was picking up the internet wirelessly, but it its wired. A few things seem to mention DHCP though.

Any help would be amazing please. If you dont have time to write how, or point me in the right direction, then just the name of what I'm trying to do would be much appreciated, but any help would be great.

Thanks a lot,


A:Wireless DHCP network problems

one approach: multiple routers

I've written this several times, so I'll refer to a common post here.

Ask specific questions and I'll reply

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I saw something relating to rogue DHCP virus earlier in this forum however I do not believe it is what we are experiencing.

On Friday our company got hit with a redirect which appeared to be from W3.org, but spoofed. It was then stating to "update" your browser for incompatibility. It is an unknown as to whether or not (:P) anyone actually "clicked" on the update, but since then a "phantom" DHCP server comes up every so often upon various PC's at this point I know it is traveling around.

After quick diagnosis we determined that something was "creating" a DHCP server on our XP PC's. A redirection then sent the PC to a network out of Eastern Europe. This effectively was starting to swarm across the network and replacing DHCP settings.

It is a rootkit and I am using Combofix to remove it, I am aware of the dangers of using Combofix having used it for nearly 10 years now. I would rather take the risk of damaging a PC than my network. I just have not had time to review the logs and see much info. Even if I did, we all know what the answer is to that.

My question is does anyone know what this is and how to stop it? It has popped up several times since and believe it may be floating around somewhere within the network, but what to look for and if possible how to prevent the future outbreak, I am shooting from the hip currently playing whack-a-mole.

So in the end I am looking for what is this rootkit named and also looking f... Read more

A:Rogue DHCP virus in the network


Without seeing any logs it is impossible to diagnose this infection.

It sound like this is a fair sized company and I think the best option is going to be to contact you IT department/support and have them remove the infection.

We are here to assist the home users who fall fail to infection, I am afraid it is not really our place to take over from your paid/onsite IT support.

All the time these machines are networked, you will be chasing your tail trying to remove this.

Your IT department should be able to clean the network in next to no time.


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I have 3 network cards in my Windows 8.1 computer.   Each is attached to a different network.   I have assigned a static IP address to network card 1 which is on the internal LAN segment.   I want the other 2 network cards,
which are on different networks to run in promiscuous mode (IE.  No IP Assigned) so that I can sniff traffic.   There are no DHCP servers on those 2 other networks but there is one on the LAN which card #1 is plugged into.

My problem is that the 2 other network cards are getting IP addresses from the DHCP server on the card #1 network.   How is that possible?   If I disconnect card 1 from the network, the other 2 cards don't get an IP address.  
If I connect card #1 again, the other 2 cards get a DHCP assigned address.   So how to I stop network card #1 from forwarding DHCP traffic to cards #2 and #3?   Anyone know?



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I am running windows xp on a dell inspiron 4150 with a built in wireless card. My wireless was working fine until windows prompted me to reboot due to windows update. It stopped working after that. It is telling me that no ip address can be found and when I ipconfiged it with renew and all it still could not find it. It gave me an error message that says cannot connect to DHCP server.
Any help will be appreciated.
Thank you,

A:Network could not connect to DHCP server

Nothing really comes to mind, but if you're using Window's Wireless Zero Configuration maybe you need to reconfigure your wireless connection; especially if your network is protected with encryption.

I use the utilities from my wireless cards' manufacturers to connect to my WPA protectecd network and had no trouble today after the same reboot (two notebooks). Well, same reboot if you're talking about the critical update released yesterday.

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Hello everyone,
I am working with a moderately sized network of about 75 devices. We have a device for our VOIP that supplies DHCP for the phones. Unfortunately this device is also handing out IPs to our other devices and causing them to be unable to see our other network services ( Internet filter and hosted applications ). I need to put a system in place to force our network to prioritize our other DHCP over our VOIP server. Setting a static ip address works but this is not an ideal solution.
VOIP - 10.172.0.X ( Forces all devices to have an address in this range when assigned to DHCP )
Network - 10.170.0.X

A:DHCP Issues on Moderate Sized Network

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my network card cant obtain IP from my DHCP server after I installed windows xp and loaded the drivers what i got was limited or no connectivity

thank you

A:my network card cant obtain IP from my DHCP server

Hello kwachaa and welcome to TSF...
Try to Repair Connection...
Double-click on Local Area Network and go to support tab and hit 'Repair' button...
Make sure you set to get Automatic Address automatically...
Hope this will help you mate...

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I warmly welcome

I have a problem with configuring network cards

WIFI comes nicely with DHCP pool 192.168.0 .*

I have a virtual network adapter "Microsoft Loopback Adapter"
in it I have to have a static IP address
and set it manually (IPv4)

the problem is that the WiFi card is still changing my IP address of the virtual card

how to prevent it?

I wanted to wifi card automatically collects the IP address
but did not interfere in the virtual adapter's IP

A:Wifi DHCP - the second network card on a fixed IP

I quote (from ):

Microsoft Loopback Adapter is a dummy network card, no hardware is involved. It is used as a testing tool for a virtual network environment where network access is not available. Also, you must use the Loopback adapter if there are conflicts with a network adapter or with a network adapter driver. You can bind network clients, protocols, and other network configuration items to the Loopback adapter, and you can install the network adapter driver or network adapter later while retaining the network configuration information.

Given that, there is no way your wi-fi card can "change" the IP address of your fake network adapter. If you set a static IP for ANY adapter, it WILL stay that way, regardless if one adapter is set to release and renew based on DHCP and one is not.

I even tried it myself. I installed the loopback adapter, set an IP and all that for it, released ALL DHCP'd IPs and renewed them. the static IP for the loopback adapter didn't change.

Take a look at your settings again, make sure you didn't miss something.

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So I have a small business I do IT work for. They are using Engenius WAPs for wireless which support multiple SSIDs and VLAN. DHCP is handed out by a Win2K8R2 server.

Now they want to set up a guest wireless network that only has access to internet and none of their internal resources. Problem is they need connectivity to the DHCP server. They have all dumb switches that don't support VLAN tagging.

I haven't worked much with VLANs, but I understand the concept and I'm trying to figure out if there is a way to provide what they wish (which is pretty straightfoward) without either

a. having to change the WAPs for something that have built in DHCP (that can be enabled on a per SSID basis) or
b. replace the dumb switches with switches that support VLANs

Any advice greatly appreciated. Thanks!

A:guess wireless network dhcp and vlan

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Hi folks,

As I've said in the title, I'm looking to make a network with two routers but only having DHCP enabled on the secondary router.

Before I go any further I must ask: I have an Arris GT840A (sigh) as the primary ISP required modem. I'm currently connecting via wifi and sometimes have pings to the router coming back in the 1 - 20ms range for extended periods and it's decent. Other times I get a huge range of different ping times, often in the 300ms - 6,000ms range and sometimes even dropped.

Is disabling the DHCP server on the modem and relegating all local networking duties to my WRT54GV2 likely to alleviate this problem, or does this simply boil down to I'm screwed because I have to use this Arris modem?

Moving on with the primary question, here is my current setup:

Router 1: Arris GT840A
WAN IP: Dynamic / ISP assigned
DHCP: Enabled - 50

Router 2: WRT54GV2 (Connected to router 1 via WAN port)
DHCP: Enabled - 50

With my current setup I have been able to ping both router 1 and 2 via wifi, but I have not been able to ping or connect to the internet at large. I have read a couple of different how-to's and other forum answers and feel like this is how I'm supposed to be setting it up, but it's still not working. Something that concerns me about this attempted setup is that it still is using DHCP from the Arris modem / router, and I'm r... Read more

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I have a question regarding DHCP on a established network. The network in work uses static IP addresses right now. The boss wants to enable DHCP so when he brings in his laptop he can just plug into the network and get on-line. My question is can I put DHCP on the NT server and just configure it for a small set of addresses Ex. to Or do I have to set up all the workstations and servers that are on the network to use the DHCP server?

A:{Advice Offered} - DHCP on an established network?

As long as you make sure the scope doesn't include IP addresses you are already using, you'll be fine. There is nothing wrong with a DHCP server only serving out to a few machines, while others remain static.

Of course, switching them all to DHCP might not be a bad idea, to make adding new machines, upgrading, etc... easier in the future. But you can do it a little at a time.

Get free stuff and help out a poor computer tech:
LarryCore begs for money

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I am setting up a linux box for a server on my home network which is DHCP, I don't want to change the entire network, I just need this server to have a static IP (so that I can get port forwarding to work). I don't even know if this is possible, if I were to give the server a static IP can my router deal with it, even though everything else is DHCP? My router is a linksys WRT54GS if that helps any.
An answer to this would be much appreciated. ^_^ Thanks

A:Solved: Is it possible to have one computer with Static IP on a DHCP Network?

Yes just make sure it sits outside of your DHCP scope so if DHCP starts at and has 100 seats then make the machine be or lower or and higher and it would be fine. Make sure to copy all other items from what DHCP would give you. E.G. DNS, Subnet mask and gateway.

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here is what happen, I am using internet and tv from the service provider, so they send me a new router which handle internet traffic and TV traffic, but since it already doing so much the technician told me not to enable the wireless function, else it might crash often.

so I have two router now,
router A handles TV and Internet (PS3 and A labtop)
router B handles wired and wireless internet ( I have it MAC enable, so ppl won't be able to access my wireless network from outside)

how should I setup so PS3 can access movies from computers behind router B ?

EDIT: I tried to make them within the same subnet

router A : (DHCP 65-99)
router B : (DHCP 100-120)

when I connect router A with B by connect ethernet cable by LAN, Router A is able to ping a computer behind router A, but the computer can't ping router A.

and computers behind router B has no access to internet, but is able to log into the router B setup page.

A:Need help to link two router within one network, and two dhcp server?

Please use edit rather than create another post.

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Hello, i was not exactly sure where i am supposed to post this question so if this isnt the right place i will delete this and repost where you tell me too, here is the problem.

I have a computer on a school network, i recently set up a WDS server to make rebuilding computers allot easier and faster. I created an image for a Inspiron Desktop 560ST but when i tried to redeploy the image back on the exact same computer while connecting to WDS deployment service i get this error.

<Installing windows>
WdsClient: An error Occured while obtaining an IP address from the DHCP server. Please check to ensure that there is an operational DHCP server on this network segment.

I do have a DHCP server and it is on.....

In the same screen i get the error i press shift+f10 to bring up CMD and type ipconfig and this is what i get

Windows IP Configuration

Ethernet adapter Local Area Connection:

Connection-Specific DNS Suffix . :
Link-Local IPv6 Address . . . . . . : fe80::70bb:e025:dd6c:cf84%2
Autoconfiguration IPv4 Address . .:
SubNet Mask . . . . . . .. . . . . . . .:
Default Gateway . . . . .. . . . . . .. :
_________________________... Read more

A:Solved: Can not connect to DHCP on a network computer

Networking would be the right section, I`ve moved the thread for you.

Does the card work while in Windows, maybe the network card is no good.

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if it is a windows 7 box, try this: http://windows7themes.net/how-to-enable-dhcp-in-windows-7.html
if it is xp, try this: http://www.cs.cmu.edu/~help/networking/dhcp_info/dhcp_xp.html
if it is vista, the first one should work. now linux, is a little bit trickier, but i would have to know the version.

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At title states. I'm baffled

Unable to create a connection with the windows 7/64 machine. I've tried both dhcp and static with no resolve. Disabled/Enabled the adapter. Restarted the machine a few times. Uninstalled/Reinstalled/Updated/deleted the nic drivers and also let windows install its drivers. Used alternate eth cables / ports on hub.... other machines and mac work fine.

Network adapter states "This device is working properly"... local area connection status states:
ipv4 connectivity: no network access
media state: enabled

ran diagnose under the nic context menu and "troubleshooting couldn't identify the problem"...

System was working fine two days ago before I left for the weekend... machine was turned off before I left and was still off when I returned. Also, windows updates are set to manual.

A:Solved: Unidentified Network (DHCP / Static)

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so i have 3 computers and 2 ipod touches on my network.
2 computer are connected via ethernet and one via wireless.
1 pc on ethernet works just fine as well as one ipod touch.

the remaining, not so much.
i have done practically everything
the computers show up on the network, can trade files and look fine, but when i click on an internet browser, IM, or email, i get no connectivity.

i have verified DHCP is on and working.
i have pinged google.com and it timed out
i did the repair icon
restarted routers, and modem
i released and renewed ip settings via cmd
disabled and enabled network connections

so far nothing has worked, any help would be great appreciated.

A:no internet connectivity on SOME computers on network. DHCP is on

Please supply the following info, exact make and models of the equipment please.

Name of your ISP (Internet Service Provider).
Make and exact model of the broadband modem.
Make and exact model and hardware version of the router (if a separate unit).
Model numbers can usually be obtained from the label on the device.
Connection type, wired or wireless.
If wireless, encryption used, (none, WEP, WPA, or WPA2)
Version and patch level of Windows on all affected machines, i.e. XP (Home or Pro), SP1-SP2-SP3, Vista (Home, Business, Ultimate), etc.
The Internet Browser in use, IE, Firefox, Opera, etc.

Please give an exact description of your problem symptoms, including the exact text of any error messages.

If you're using a wireless connection, have you tried a direct connection with a cable to see if that changes the symptoms?
For wireless issues, have you disabled all encryption on the router to see if you can connect that way?
Have you connected directly to the broadband modem to see if this is a router or modem/ISP issue?
If there are other computers on the same network, are they experiencing the same issue, or do they function normally?

On any affected computer, I'd also like to see this:

Hold the Windows key and press R, then type CMD (COMMAND for W98/WME) to open a command prompt:

Type the following commands on separate lines, following each one with the Enter key:


PING yahoo.com



Right click in the comm... Read more

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I have two laptops, L1 and L2. Recently, L2 stopped connecting to the internet via my Linksys wireless router. However, L1 can still connect just fine via the same router. L1 runs winXP SP3, L2 runs win7 Home Premium x64 SP1. Usually when L1 or L2 stops connecting, I turn off the wireless cards on both computers, power-cycle the modem and router, turn on the wireless cards, and then the laptops both connect. However, this workaround isn?t working for L2 anymore.

The event viewer shows errors such as the following:

The IP address lease for the Network Card with network address 0x70F1A12F2601 has been denied by the DHCP server (The DHCP Server sent a DHCPNACK message). Event ID 1002.


Your computer was not able to renew its address from the network (from the DHCP Server) for the Network Card with network address 0xA4BADBB01388. The following error occurred: 0x79. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server. Event ID 1003.

(I tried using both the wireless and ethernet cards, but both experienced the same lack of connectivity, with the same error messages.)

I have found seemingly relevant threads here and here, but the solutions proffered have not worked.

The network diagnostic tool says:

Root Cause: Your computer appears to be correctly configured, but the device or resource (DNS server) is not responding. Root Cause Guid: {902390d9-0cd9-4f91-9e6c-8fa5e6dad657}... Read more

A:limited network connectivity - DHCP and DNS servers not responding

I should clarify that the problem was with L2, running win7. L1, running xp, had connectivity the whole time. Before doing a system restore, I also tried resetting the router (pushing reset button in back for 30 seconds), but that didn't solve the problem.

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Hello, I have been experiencing some problems on my home network. I have problems with AOL, FTP and steam online games like counterstrike, team fortress 2, and day of defeat. I get these problems about 3/4 of the time, and 1/4 these programs will work.

When I sign into AOL I get a message saying "Could not connect to authentication server:
Windows socket error #10060". On FTP about half of the time I am not able to connect, and I the connection keeps timing out. On the steam games, when I open up the game dialog, I don't get the auto-retry option that is normally available. I tested these problems on other computers at my house and the same behavior occurs.

A:Solved: Problems on a DHCP wireless home network

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I have a problem with a Windows 7 64 bits. After power on, the DHCP client tries to acquire an IP for all the network cards, even those that are not connected.
I can see in the event logs that after 2 minutes from the startup, I get one message for each interface

Your computer was not assigned an address from the network (by the DHCP Server) for the Network Card with network address 0xMAC_ADDRESS. The following error occurred: 0x79. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server."

I have an Astaro VPN client that manifests itself as a network card and when I start it up (manually) it fails to receive an IP from the DHCP server. I believe it is related with this general DHCP problem because if I start it up within two minutes from power on (before I get the message in the event log), then it works.

Any idea how to debug this problem?
I had a Dell connection manager which I uninstalled (thinking it will solve the problem), maybe this one left some bad traces. Any idea how to find and remove them?
In general, how would one know all the programs that are dealing/interfering with the network connections and dhcp settings?

A:DHCP client tries to aquire an IP for not connected network cards

See the following:

DHCPv6-client....Errors in event viewer.

That may help.

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Having trouble with my Windows 7 Ultimate (64-bit) wired LAN connection. Yesterday evening everything was fine, I was connected and doing some remote work into the office - I was playing with OpenVPN connections. I left the machine for a few hours logged on, came back and now the NIC appears dead.

I have restored windows to the point just before i installed Open VPN.

I get "Unidentified network" and "no internet connection" for my LAN connection in Network Centre. There's no gateway or ip assigned looking at ipconfig /all, just the self assigned 169.* ip

The ethernet cable is connected directly into my cable modem (note, not a router).

I have googled a lot and have tried (not necessarily in this order):

1. Ensured its not the WAN/RJ-45 cable - have connected successfully with an older laptop's LAN NIC. When switching machines i turn off both the machine and the modem for 30 secs, and typically tun network troubleshooter to reset the LAN.
2. Tested the internal NIC by pinging, loopback successful.
3. Uninstalled the LAN NIC and reinstalled it.
4. Removed all clients & protocols from the NIC's properties bar IPv4 and Microsoft Client for windows i.e. specifically removed IPv6.
5. Reset TCP/IP using netsh int ip reset c:\resetlog.txt.
6. Have removed the wireless adapter. The only network connection is the internal NIC.

All forums I've scoured suggest one or more of these things, so I'm exhasuted of ideas.

There&#... Read more

A:Solved: Ethernet card - No DHCP, unidentified network

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Hello All, My company has been buying the M910Z systems since last year and I have noticed that the NIC card on these things will just randomly not pick up an IP address via DHCP when the PC is first powered on or when a network cable is unplugged. This doesnt happen everytime, but there are instances when the PCs go to sleep and the user is unable to connect back to the network due to the PC dropping the network connection. To resolve the issue, i have to either shut the PC down and then boot it back up or go into the control panel, diable/enable the NIC card in hopes for it to grab an IP. Is there a fix to this issue because im assuming its either a BIOS or NIC driver issue because I have isolated the issue down to these PCs and i wanted to see if the community could help me out here.

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I'm trying to setup an FTP server to upload photos and videos to, and tried to setup a program to automatically change the ip on the domain every time it changes, but have been having trouble with it.

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I have a problem with my pc randomly locking up and having to be rebooted. I believe it has to do with the wireless card accessing my network, but I can’t figure out how to troubleshoot it. (If this is the wrong forum, please let me know!)

I have a desktop, two laptops, and a printer on a wireless network. All of them have been working fine. Then, about a month ago, I loaded a new game on my desktop, which worked entirely fine for roughly three weeks. Then last week, I tried setting up a server in the game. On my first attempt, it locked up my pc at the setup server stage, and I had to reboot. On my second attempt, I tried a slightly different configuration, and it created a local server and worked just fine.

Everything seemed okay for a couple of days, and then the game started to lag after a few minutes of play. After two or three more rounds of play, the lag was then accompanied by the pc locking up. Couldn't figure out why, so I stopped playing it.

Within a day or two, my desktop would randomly freeze without warning, with no clear connection to any specific application or time of day. This has continued to today. Sometimes the lock up is preceded by erratic behavior, such as the wireless keyboard freezing up though the companion wireless mouse will work (or vice versa) and an occasional USB connecting-then-disconnecting sound, though nothing had been touched. Sometimes the lock up is for 10 seconds or so. Most of the time, though, there are no warnings, and it ... Read more

A:Solved: Lock ups due to DHCP / network card issue?

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Hello. I just moved to Auckland, NZ from the USA to go to school at the university here, and am having a problem connecting to the internet in the university residence hall in which I am living.
Wifi is not available in the residence halls, so we need to use an Ethernet cable. When I plug in my computer, the network adapter icon says “Identifying...” for a while then settles on “Unidentified Network” with no internet access, the IP is 169.x.x.x
When I try to release and renew the IP, it says “unable to contact your DHCP server, request has timed out"
I've tried multiple Ethernet cables, both brand new.
I tried connecting to a port in a friend's room in the same building, and even in a classroom on campus, and both had the same result.
Naturally after all that I assumed my NIC somehow died overnight while I traveled here, so I went to a computer repair shop expecting to have some hardware replaced, but we plugged it in there and it worked immediately so they weren't sure what to tell me.
I've gone through pages of old threads at this forum and others like it, trying solutions but having no luck.
I've power cycled my computer, obviously I can't power cycle the whole network as it's for 200 people, but the IT people here have tried resetting it for me on their end as best they can.
No network bridges
I've reset tcp/ip stack and winsock
It's not a static ip, set to obtain ip and dns automatically
No fire... Read more

A:Unidentified Network, Unable to contact your DHCP server

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I installed my linksys wrt54G v1 router that has DD-WRT v32 SP2 on it and my network worked great. I then plugged in my linksys switch with about 20 devices (internet phones, networked printers, windows pc, linux asterisk phone system) already connected and on. Almost immediately my internet went down, I could not access my router hardly ever, and lan connectivity failed or was flaky at best.
The dhcp lease table did not show the new devices assigned except for several static assignments.

I unplugged the switch, power cycled the router and all was fine.
I then plugged in the switch without devices and worked fine.
I turned off all networked devices connected to the switch, turned them on one at a time. Then everything worked. The lease table showed all the devices with default lease time of 24 hours.
About 48 hours later I walked into the office with internet down, no lan connectivity, and could not log onto the router either.
I performed the same fix above, and now we are working again just fine.

I had the same problem with a stock linksys 8 port router and using either the linksys switch or a netgear switch.

I think I am having lease renewal dhcp issues, but I have never experienced this problem before. I would appreciate your advice to avoid the next network crash - it ruins my morning.

DD-WRT v23 SP2
linnksys WRT54G v1
linksys 24 port switch

A:DHCP lease renewal issues crashes my network

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Avg found two trojans. It didn't seem like it removed them. Internet was working though. Ran malwarebytes it found nothing. Internet was still working. Started Having connectivity issues. My dhcp client service won't start. I got a 1075 error. my internet via wifi or wired. I ran the following command prompts:
net start AFD (response: the requested has already been started)
netsh int ip reset reset.log (response: resetting echo request, failed. Access is denied. Rebooting interface, ok! A reboot is required to complete this action.
netsh winsock reset catalog (response: successfully reset the winsock catalog. You must restart the computer in order to complete the reset.
SFC /SCANNOW (scan finishes and shows this response: windows resource protection found corrupt files but was unable to fix some of them. Details are included in the cbs.log windir\logs\cbs\cbs.log

What now? Please help.

A:Network issue dhcp client service error 1075

I'm thinking you're still infected.


You need to start a thread in the Virus & Other Malware Removal section of this site.

Before you post though, you need to read THIS guide.

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ok so a buddy at work asked if i could look at a laptop. it was working fine apparently, but then out of the blue the internet will no longer work. so i bring it home, it hooks up to my Network, but no internet. i change it to a private network (though it automatically changes it back when i restart.) and still no internet. i've tried to manually and automatically change the IPv4. no avail. Looking at the Network and Sharing Center the middle icon says Identifying, but theirs an x between that and internet. *i have local only* when i try to resolve the problem it says Dhcp is not running tried restarting it, but it says it cant and that it didnt fix the problem. i dont believe its my modem or router my base pc runs on it fine. *plus this pc was doing this for said friend* also on one forum a guy stated that their were three different programs that were supposed to be running. he said to check them through cmd. i did. they were running. just not DHCP. i've had to restart this laptop about 20 times or so. i cannot change os *Vista (bleh)* nor do a system restore. *wish i could* i also put avira on the computer to check for viruses. *which it did* so that is on their. i also tried uninstalling his ethernet card, so its at Broadcom 590x 10/100 ethernet, i tried then to updated but the file didnt work. so i cannot even update that through the laptop. i have it hooked up through wireless and wired, but without internet. i have his windows firewall on, but i've tried ... Read more

A:Limeted connectivity/Unidentified Network/unable to start DHCP

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  I have several windows 8.1 machines connected to a private network.  The clients all obtain their first DHCP leases correctly and work well for a time. At some point after having been running for awhile, they get into a state where they start
ignoring the DHCP ACK messages from the DHCP server when they attempt to renew their leases (see attached pcap file).  They go on ignoring the responses to their DHCP Requests until they lose their IP addresses and then send a DHCP Discover and receive
a DHCP Offer.  At this point, they seem to accept their new address and move on until it is time to renew again, at which point they start ignoring their DHCP ACKs again and the cycle continues.  These machines will work for hours with no problems
whatsoever, but they all seem to experience this issue at some point every day.  When they get into the state where they are ignoring their DHCP acks, they will stay that way until they are rebooted.  Disabling and then re-enabling the adapter does
not seem to fix the issue.
 Does anyone have any idea what could be going on?  I'm pretty stumped at this point.

Thank you,

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When logging onto the company network via a RAS server, the DHCP active leases is not being updated with the IP address assigned to me. This is the case both when the RAS server is configured to give an IP address from a fixed pool, or when configured to obtain IP address from DHCP. As a result, I'm experiencing problems if an existing lan device has an IP address assigned and the dialed in device grabs that address. Whats going on ?

A:{Solved} - DHCP active leases not being updated when dialing into network via RAS server


There should be a clear distinction between the IP adresses available for the network, and those available for the Dial up users. Do not make them part of the same IP group.

The reason is that Dial-up IP addresses should have a lease time of a few hours, and the LAN lease time should be that of a few days. This is obviously not compatible, so they need to be seperate.

Hope this helps

Reuel Miller
Windows NT Moderator (yes, that does make me biased )

[email protected]

Every morning is the dawn of a new error...

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Hi all,

I recieved my new notebook clevo170hm yesterday. The laptop was working fine for 2 days, but today it started behaving weirdly when I tried connecting it to the LAN internet and it said "no network access" and "unidentified network". I remembering installing a windows update and after a reboot this error came up, before the update things were good . Here's the event viewer error description:

Your computer was not assigned an address from the network (by the DHCP Server) for the Network Card with network address 0x0090F5C1E007. The following error occurred: 0x79. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server.
Apart from that I tried connecting to my wifi network, still gave me the same error " unidentified network". Here is the cmd command result for "ipconfig/all"


Windows IP Configuration

Host Name . . . . . . . . . . . . : #####-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : JMicron PCI Express Gigabit Ethernet Adapter
Physical Address. . . . . . . . . : 00-90-F5-C1-E0-07
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes... Read more

A:Network connection error 0x79, IP not assigned by DHCP. Event ID 1001

Forgot to mention, I do not have a router or modem. I am living in university accommodation hence all I got on the other end is a n ethernet socket.

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Precondition: When network cable is plugged, i have saved network settings to DHCP enabled status for both IP address and DNS server.
Now unplug the network cable and execute below commands.
netsh interface ip set address "Local Area Connection" static address= mask= gateway=
netsh interface ip set dnsservers name="Local Area Connection" static primary no

The above commands will execute successfully and i can able to see the changed settings in below location
Network and Sharing Center --> Change adapter settings --> select the connection name used in above commands --> Check the properties of IPv4

However netsh show command still shows that connection is in DHCP enabled state (even though i have set to static).
netsh interface ip show address name="Local Area Connection"
Note: After plugging network cable, netsh show command gives correct information (i.e. DHCP is not enabled)

Because of this issue i am not able to execute below command (changing network settings from static to DHCP, in continuation to the first two commands)
netsh interface ip set address name="Local Area Connection" source=dhcp
Gives error message: DHCP is already enabled on this interface.

Please provide information on why "netsh" command is not able to save static setting and not able to show previously set network information.

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I'm running a simple network at home with a Linksys BEFSR41 router. I have two computers hooked up wired and a wireless router acting like an access point that I use for my laptop occasionally. Until this weekend I've been having no problems but I shut down the computers due to weather and now one of them is not able to communicate with any others on the network. The problem computer will get an address supplied to it by the router (DHCP server) but once it has it I cannot get any other connectivity. Of course this is hindering internet access on this computer. I can ping the loopback and assigned IP addresses w/o problems but when I ping the default gateway (router) and/or the other computer I get "Request timed out." I initially thought it was the NIC so I bought another one but still get the same issue. I've moved the cards to different PCI slots but no luck. I tested the cable running from the computer and the router but found no problems. I even tried resetting the TCP/IP stack but still didn't work. The computer in question is running WinXP SP2 with the original NIC being a Linksys LNE100TX and the new one being a D-Link DFE-530TX+.

Any clues on this? If more info is needed let me know--it's been a while since I've posted. Thanks in advance.

A:Solved: Getting IP addr from DHCP but cannot ping DHCP server

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I need the IP address ,DNS and gateway address so on .Is it possibile to get it from the modems DHCP or do I need the ISP DHCP working?

I'm setting up are home network and getting connected to the internet but the internet connection is down .But is it possibile that I can get this from the modem. .

Like how does the computer talk to the modem and the modem talk to the DHCP server .I never had this problem before.

A:Can you get DHCP info from the modem software even when the DHCP server is down

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Hi There Everyone at TechGuy! I am desperate for some HELP...Please?..........PRETTY PLEEEAAASSEE ???
Now,..Before i Continue Please First Be Sure to Read Fully as I did Some Google Searching & Tried Some Forum Fix It Options that I Found, which havent worked at all but I will leave you all info as well as some screen shots.
Second...Please know that I am not Very Computer Savvy or Knowledgable. Well,....a Little for a Home User but with the Operating System, NOT with this problem & networking, routers, modems, IP addresses & DHCP !! Networking is DEFINITELY NOT my area of expertise So Please Handle with Care. lol. THANKS & HUGS in Advanced!

The Problem.
We have a Desktop computer as well as a Lap Top,..both Running WINDOWS XP. The Lap Top is Wireless with a LINKSYS Wireless Card & the Desktop has the MOTOROLA Modem & a LINKSYS Router & we are BROADBAND Connected.
Both were Running & Working just fine & they were Both Accessing the Internet just fine...until 3 days ago when the Man in the house had to turn off the house power to find & replace a circuit breaker for the fritzing out Microwave & we turned off both computers before he did this. When the power was put back on, the Desktop Computer was back to its normal fine self & running perfectly. The Wireless Lap Top on the other hand was not.
The Wireless Laptop Popped Up with a Yellow Explaination Mark over the Double Computer Icon in the Bottom Right Task Bar...Near the ... Read more

A:Unable to Contact DHCP Server~Limited or No Connectivity~Cannot Assign Network Addres

if you connect the laptop to the router with a cable - does it work ?
you will need to copy between a working PC and laptop

would you post an image of device manager - see below
would you download xirrus and posr image see below
also post an ipconfig /all and if you could post into a reply - rather than a picture -
that the Wireless Card was never installed right to begin withClick to expand...

I'm interested in the ethernet connection that has wireless as a name - does the laptop have a built in wirelsss or do you use an adapter
{Device Manager}
Post back the results in device manager
Start > control Panel {Vista set to classic view}> system > {Vista, device manager on left hand side} {XP hardware Tab, device manager button} >
windows 7
start > control panel> System and Security> Device Manager

network adaptors, click on the + > post back the devices listed there
are there any ! ? or X
post a screen shot of the device manager - network adapters

To post a screen shot of the active window, hold the Alt key and press the PrtScn key. Open the Windows PAINT application and Paste the screen shot. You can then use PAINT to trim to suit, and save it as a JPG format file.
To upload it to the forum, open the full reply window and use the Manage Attachments button to upload it here
-----------... Read more

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