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Network wierdness

By rkornmd ·
HI all.

I have just spent 5 hours on the phone with Linksys and Compaq; no one can answer me.

I have a linksys router (WRT54g) with 2 wireless and one wired PC (the latter running xp Pro, others are XP) that all work fine--resource and file sharing, no prob. All have auto-IP assignment from router in range 192.168.1.100-111 as specified by the router setup.

My COmpaq PC (xp home) is set up the same way ( i think!) and hard wired into router as well. However, it gets an auto-assigned IP that is out of range (192.168.15.2). It cannot "see" any other PC's in the windows network windows, and they cannot see it or it's shared printer or drives. It gets to the Internet just fine.

But here is the bizarre part. I can ping all the other PC's from the problem PC! I can access the router, including the admin panel, from the problem PC as well, but it's IP and MAC address are not listed in the DHCP clients table!

I have enabled netbios over TCPIP, diabled firewalls, forced a static IP in the correct range, even run a winsock fix I found at a spyware site. Router reboots, ipconfig release and renew from dos windows, multiple PC reboots, all not working. I have also insured that Computer Browser Services are "started".

It seems to me that the answer must be in some arcane XP setting, since the physical connection (intact ping) to the other PC's is confirmed.

Any thoughts?

Robert

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by fungus-among-us In reply to Network wierdness

Sounds like you know you have an idea of what you are doing.... which is a good thing. :)

I find it hard to believe that one of the hard wired PC's is picking up a totally different IP range than the other PCs.

If everything is set to "auto", the Compaq PC should pick up the IP from the DHCP with the same IP range. Truly wierd... I'm going to blame the router. Is there any way you can pick up an identical router from the store, to test against yours? That'd be my first move to make... if it turns out to actually be the router itself, you can call linksys and tell them you "found" the problem and hope they issue you an RMA. Or return your defective router to the store, keeping the "working" one, and tell the store that the router is "defective".

Good Luck, let us know what you find out.

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by rkornmd In reply to

A nice try, but solution already tried.

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by rkornmd In reply to Network wierdness

Well, I THOUGHT I knew what I was doing.

Here's the bad news on your theory. I have a laptop on the network; I disabled the wireless on it, and plugged it in via an RJ45. It had never been on the network as a wired PC before; it found an IP address within range immediately, and saw all the other PCs.

Still think I need to swap routers? I actually have an old non-wireless linksys router i could swap as a test, but with the above being true, i don think I should bother

R

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by rkornmd In reply to

More strange goings on....
I cannot ping "in" to the problem machine from any other machine, even though it pings out. This sounds like firewall to me.
I have disabled Norton autoprotect, to no avail
And interestingly, the Windows firewall resets itself to "on" with every reboot, eventhough I disable it. I find this out when i check the LAN network connection, and it's label says "firewalled".
I have scoured the machine lookng for something womeone else installed, like Zonealarm or something; cant find anything. My wifes runs AOL (ugh) on thsi machine, and has a spyware zapper that comes on at reboot, but nothing else I can see. does any of this help?

R

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by salvi In reply to Network wierdness

Your problem sounds impossible if the Router is configured correctly within the range that you have specified. A couple of questions for you...

1. Does the PC with the problem also have a Wireless card? I ask because if it does, it could be connecting to an unknown open connection, therefore getting the different IP but at the same time being able to connect to your router and ping other PCs within your LAN. If it does, try disabling that Wifi connection.

2. The reason you cannot ping into the PC is because your firewall is enabled. Have you downloaded/installed the most current Windows updates/service packs???

3. When you perform the command "ipconfig /all" at the command prompt, what is your default gateway? If you disable DHCP and set a static IP, what IP address do you receive when performing the above command?

4. If all else fails, remove the NIC and install a NIC from one of the PCs that are working and see if that fixes the problem. Please provide detailed info on the results of the "IPCONFIG /ALL" command.

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by rkornmd In reply to

1-no wireless card
2-default gateway 192.168.15.1 with ipconfig /all
3-windows updated (auto)
4-just found updated driver for NIC and will load and re-try
5-ipconfig all with forced IP to 192.168.1.20=
ip 192 168 1 20
Sm 255 255 255 0
default gateway and DNS server 192 168 1 1

When i force this address, i cannot ping the router nor get to the net.

Does this help? Am loading the new driver now

R

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by salvi In reply to Network wierdness

Thanks for the info...further questions...


2-default gateway 192.168.15.1 with ipconfig /all
***If you do an Ipconfig /all on a machine that is working, what gateway do you get? If they are different, they you are definately getting and IP address from somewhere else or the router is somehow configure differently to provide a different gateway for wired/wireless devices, which I have never seen before.

3-windows updated (auto)
*** Is the PC updated with the most current SP?

4-just found updated driver for NIC and will load and re-try
*** If that doesn't work, try using a known good NIC.

5-ipconfig all with forced IP to 192.168.1.20=
ip 192 168 1 20
Sm 255 255 255 0
default gateway and DNS server 192 168 1 1

When i force this address, i cannot ping the router nor get to the net.
*** This means that the Gateway is incorrect. Is the router IP address 192.168.1.1? Can you verify this info with a computer that is functioning properly???

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by rkornmd In reply to

IPCONFIG from other (good) wired PC:

Physical Address. . . . . . . . . : 00-12-3F-C2-CB-82
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.1.102
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 167.206.3.139
167.206.3.138
167.206.3.205
Windows update check shows all updates current

ROuter IP IS definitely 192.168.1.1 That is what I type into any browser to get to its admin screen.

I will have to pull the NIC card and find another if that is all you guys have left to try. That is a long process for me, as I am recovered from some back surgery and cant do any lifting for a few weeks.

Should I try to force the current card with some different settings? Perhaps under the adcanced tab, add the 3 DNS servers shown above from the good machine? (I am now out of my league and don't know what I am talking about)

I still think this must be some stupid firewall or software switch that I just have set wrong.

Robert

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by salvi In reply to Network wierdness

I googled the IP address that your problem PC is receiving and most hits came back with Vonage, like the one below...

http://www.vonage-forum.com/ftopic6699.html

If you have vonage, I think that it's something that you should have mentioned before hand since it's part of your network. I guess with this information you should have more to go on and people to call for support. If you need more assistance, let me know.

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by rkornmd In reply to

Thanks for the research. I TOTALLY FORGOT that my wife has an office phone with vonage, and the router is plugged in (in another room!) between the problem PC and my Linksys router. I will research this further and post if I need more help. Thanks!

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