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Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
Hi guys
Now for several days I'm bugged with this. My overall knowledge is poor but I'l give my best to describe the problem:
For about a year now I had this router and two computers, mine and dad's, connected to it over UTP. Win xp SP2 on both computers. The router was a nice thing, I plugged it in and it worked. I disabled the DHCP, manually set the IP's, DNS and activated net bios over TCP/IP.
I did have some initial trouble with dad's integrated network adapter but external one fixed it.
Now, few days ago, the dad's computer's internet connection simply died out. It lost all the sharing and am unable to contact the router from it no matter wht I do. I can ping router ant another machine from it but that's all I could do. My computer (from wich I'm writing this) works completely fine.
It looked like simple problem in beggining but proved to be all but such. I was gutted - never seen something like this.
In debugging mania I reinstalled drivers for both network adapters, installed wirelles adapter (!) wich connected sucessfuly and I pinged over it but still I couldn't acces the router software, internet or network.
I plugged the card into my computer and it worked perfectly. I brought the router in another room and connected it with assuredly working cable and it still didn't work. Neither wirelles did. All of those connections show they are connected and I can ping over them.
So, it just couldn't be hardware failure although it looked as such.
I disabled all firewalls.
Enabled DHCP, set aoutomatic IP's, nothing. Checked various required services, all look more or less fine. I tried disabling computer browser on one of machines but it didn't do a thing. If I knew more about these things!
Now all I have left is to format dad's drive. But, such spontaneous apperance of problem like such is really bugging me. I'l gladly post pics or more info if you need it. Thanks!
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
I would say the most likely thing would be a virus/etc, but it could be a misconfigured part of windows (say a rogue entry in your c:\windows\system32\drivers\etc\hosts file). I haven't had to deal with any of this for a few years now that we are using Fedora, but things that used to need twidling included: turning off the firewall (especially any 3rd party antivirus software -they are usually 100% pure evil), releasing/renewing the IP (run ipconfig -release and ipconfig -renew), and then clearing the caches (the easiest way to to that is to right click on the adapter and click repair). Once that fails you can try to run the wizard again, once in a blue moon that fixed it. From there you have to get down and dirty, make sure you are on the same subnet (assuming you are using a class C network that would mean all of the address start with 192.168.x.) and have the subnet mask set correctly (for class C that is 255.255.255.0). Also, make sure your computer didn't end up on the network address (the 1st address of a subnet, for a class C that is 192.168.x.0) or broadcast (192.169.x.255), and of course doesn't have the same IP as anything else on the network. If you can't even ping the router then DNS probably isn't the problem, but you can set it to 208.67.222.222 and use OpenDNS if you suspect your router/isp is causing problems.
Although, the fact that you can ping would imply we have a level 3 problem, so addressing shouldn't be the problem. If you router supports ssh/telent/etc you might try that...
If none of that works, I would say is it probably a driver problem, but you can check for hardware problems by booting a liveCD (most modern linux distros have excellent network support, at least for wired adapters) and seeing if you have connectivity then.
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Odd networking/router problem
