Author Topic: Anyone heard of a virus that blocks DNS lookups? (Read 371 times)

AKDejaVu · « **on:** December 18, 2001, 07:03:00 PM »

I was surfing along last night on my Win98 system when my DNS lookup stopped working. I went over to my other Win98 system and it didn't work their either. I tried my Win2k server (links other two to net) and DNS is working fine.

I've heard of virus (viri?) that block DNS lookup to prevent you from downloading anti-virus software... anyone know of something that may be going around? How about a virus detection program recomendation?

AKDejaVu

2Late4U · « **Reply #1 on:** December 18, 2001, 07:46:00 PM »

There certainly may be a virus that can cause that issue, but Win 9x has the ability to hose over your dns lookup table all on its own. There is a way to get it back in some cases, but its a bunch of registry editing, and that only works for some cases. Best (only) things to do is fresh install of the blasted OS.

God I hate windows some times

Kratzer · « **Reply #2 on:** December 18, 2001, 09:47:00 PM »

Is MSN your ISP?

I had the same thing happen today after work. I could connect to work, and then going through the network there, connect to the internet (using my MSN connection), but I would get 'server not found' every time I tried to hit a site normally. I finally clicked 'Detect Network Settings' in the error message, which seemed to make it actually check my network settings, and it worked fine.

AKDejaVu · « **Reply #3 on:** December 18, 2001, 10:17:00 PM »

Its not ISP related. My Win2K server is using the same DNS server as my Win98 systems... without any trouble.

I tried the proxy detection and didn't have any luck there. Me thinks something is porked.

AKDejaVu

Sancho · « **Reply #4 on:** December 19, 2001, 10:27:00 PM »

Long shot here, but try restoring url.dll from your install media.

AKDejaVu · « **Reply #5 on:** December 19, 2001, 11:09:00 PM »

Found out what the problem was/is. My ISP shut down their old DNS and moved it to a different IP addy. This was discovered when 24 hours later my Win2k system lost DNS too.

Damn that pissed me off... no notice on it.

AKDejaVu

bloom25 · « **Reply #6 on:** December 19, 2001, 11:09:00 PM »

I've heard of (and experienced) a virus that blocks access to popular anti-virus sites. I haven't seen any viruses that prevent communication with a DNS server though... (It's possible that they exist though.)