Snort mailing list archives
Re: Snort, Queso and iptables
From: John Sage <jsage () finchhaven com>
Date: Wed, 10 Oct 2001 06:49:51 -0700
Juergen: This may help, see: http://project.honeynet.org/scans/arch/scan5.txt To quote: "QUESTION -------- 1. What is the purpose of these packets? ANSWER ------ Its the OS Fingerprinting Tool, Queso" Also see: http://www.linux.org/apps/AppId_2014.html"Queso identifies operating systems via the TCP packet signature rather than banners, daemon versions, etc. The current config file lists over 80 OS's and versions. It can detect Linux Kernel versions and TCP responses from devices such as routers, terminal servers, printers, etc."
What's kernel.org doing spitting these out?Maybe they have a project doing OS inventory; maybe the source IP is forged...
HTH.. - John -- John Sage FinchHaven, Vashon Island, WA, USA http://www.finchhaven.com/ mailto:jsage () finchhaven com "The web is so, like, five minutes ago..." Juergen Fiedler wrote:
Hello, Just about every other day, snort reports a 'Possible Queso Fingerprint attempt' from a machine at kernel.org (most frequently mirrors.kernel.org). This is puzzling to me for several reasons: With whitehats.com being down, I was unable to determine what a Queso Fingerprint is. Looks like some probe of my auth port, but I have no idea what it is actually trying to do. I believe that the people at kernel.org are good and righteous. Why would they try to probe my auth port. Port 113 should be hidden behind my iptables firewall. In fact, I tried to connect to this port from the outside and was unsuccessful. Does snort actually analyze packets before they hit iptables? That seems somewhat weird. Could anyone please shed some light on one or more of my questions? Thanks in advance, Juergen
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Current thread:
- Snort, Queso and iptables Juergen Fiedler (Oct 09)
- Re: Snort, Queso and iptables John Sage (Oct 10)
- <Possible follow-ups>
- RE: Snort, Queso and iptables Graeme Fowler (Oct 10)