[Snort-sigs] Re: [Snort-users] Community Rule Update

Matt Jonkman matt at ...2436...
Sun Apr 3 19:17:25 EDT 2005

Can we get an email with the changed or new rules put out in addition to 
the notification? That'd be convenient. :)


Jason Haar wrote:
> Alex Kirk wrote:
>>Additionally, user Alexandru Ionica <gremlin at ...3039...> submitted a
>>rule which looks for rogue proxy servers running in an organization's
>>network. Anyone who wishes to submit rules may do so at
> Hmm - where should bug reports for community rules go? :-)
> I think that rule needs to be fleshed out. For one thing it'd trigger on
> every proxy server you have, so maybe it should include a "var"
> definition. Also it is specific to Squid - the following will also match
> ISA and NetCache.
> ------------------- change ----------------
> #Change the following VALID_PROXY_SERVERS to define the valid proxy
> servers on your network,
> #otherwise this will never trigger (e.g. "var VALID_PROXY_SERVERS
> [,]")
> alert tcp !$VALID_PROXY_SERVERS any -> $EXTERNAL_NET any (msg:"COMMUNITY
> WEB-MISC Proxy \
> Server Access"; flow:established,from_server;
> content:"Proxy-Connection"; nocase; content:"Via"; nocase; content:"HTTP";\
>  nocase; content: !"ERR_ACCESS_DENIED"; nocase; logto: "proxy";
> sid:100000132; rev:2;)
> -------------------------------------------------

Matthew Jonkman, CISSP
Senior Security Engineer
765-429-0398 Direct Anytime
765-448-6847 Office
866-679-5177 24x7 NOC

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