Security Incidents mailing list archives
Re: suspicious firewall rules in WinXP firewall
From: "Jamie Riden" <jamesr () europe com>
Date: Tue, 4 Jul 2006 09:07:40 +1200
On 04/07/06, kent crispin <kent () songbird com> wrote:
It appears that perhaps the resolver software/configuration has been altered so that dns queries will go to alternate root servers. I would be very curious to know what addresses dns queries are actually trying to hit...
Well, 'alternate root' in some sense. If I was such an attacker I would resolve most stuff correctly, but perhaps give incorrect answers for ebay, banking sites and similar. Without knowing, it's better to assume the worst. This happened to some machines on campus a few years ago and we responded by blocking 53/tcp and /udp outbound and insisting that everyone use our central DNS servers to resolve queries. (Which, btw, they should have already been doing as everything was configured via DHCP.) You could probably achieve the same by redirecting web traffic at the proxy level, so it pays to keep an eye on that, too. cheers, Jamie -- Jamie Riden / jamesr () europe com / jamie.riden () computer org NZ Honeynet project - http://www.nz-honeynet.org/ ------------------------------------------------------------------------------ This List Sponsored by: Black HatAttend the Black Hat Briefings & Training USA, July 29-August 3 in Las Vegas. World renowned security experts reveal tomorrow's threats today. Free of vendor pitches, the Briefings are designed to be pragmatic regardless of your security environment. Featuring 36 hands-on training courses and 10 conference tracks, networking opportunities with over 2,500 delegates from 40+ nations.
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Current thread:
- suspicious firewall rules in WinXP firewall belka (Jul 03)
- Re: suspicious firewall rules in WinXP firewall killy (Jul 03)
- Re: suspicious firewall rules in WinXP firewall Harry Hoffman (Jul 03)
- RE: suspicious firewall rules in WinXP firewall David Gillett (Jul 03)
- Re: suspicious firewall rules in WinXP firewall kent crispin (Jul 03)
- Re: suspicious firewall rules in WinXP firewall Bob Madore (Jul 03)
- Re: suspicious firewall rules in WinXP firewall Valdis . Kletnieks (Jul 04)
- Re: suspicious firewall rules in WinXP firewall Thor (Hammer of God) (Jul 04)
- Re: suspicious firewall rules in WinXP firewall Bob Madore (Jul 03)
- Re: suspicious firewall rules in WinXP firewall Jamie Riden (Jul 03)
- <Possible follow-ups>
- RE: suspicious firewall rules in WinXP firewall Darren Clarke (Jul 03)
- Re: suspicious firewall rules in WinXP firewall jimm22222 (Jul 03)
- Re: Re: suspicious firewall rules in WinXP firewall shenba_rake (Jul 04)