Re: My Webservers Are Showing Up In My Alerts

["Vadim Pushkin" <wiskbroom () hotmail com>]

> From: matt <mkettler () evi-inc com>
> To: "Vadim Pushkin" <wiskbroom () hotmail com>, 
> snort-users () lists sourceforge net
> Subject: Re: [Snort-users] My Webservers Are Showing Up In My Alerts
> Date: Thu, 13 Jun 2002 20:33:18 -0400
>
> If I'm reading you right, you've fixed one problem, but still have a 
> problem where it looks like your squid server is attacking other people's 
> networks.
>
> Have you tried modifying EXTERNAL_NET to not be "any" but instead be 
> "!$HOME_NET" or "!$HTTP_SERVERS". If you're only interested in inbound 
> attacks I'd highly recommend it as it will speed snort up, and kill this 
> kind of false alert.


You mean use something like this?

alert tcp any !$HTTP_SERVERS -> $HTTP_SERVERS $HTTP_SERVERS_PORT 
(msg:"WEB-CGI calendar access"; flags:A+; uricontent:"/calendar"; nocase; 
classtype:attempted-recon; sid:882; rev:2;)


> At 12:24 AM 6/14/2002 +0000, Vadim Pushkin wrote:
> > I already did that, in fact I have this instead:
> >
> > alert tcp $EXTERNAL_NET any -> !$HTTP_SERVERS 8080 (msg:"SCAN Proxy 
> > \(8080\) attempt"; flags:S; classtype:attempted-recon; sid:620; rev:2;)
> >
> > The problem is that these are ALSO my proxy servers running
> > Squid. As such, they are the spring broard into "other" peoples
> > webservers. Because of this I get alot of WEB-cgi calendar,
> > WEB-IIS scripts, etc to these machines. Should I add a "!"
> > into ALL of my rules? I hope not :-)
> >
> > Thanks again,
> >
> > Vad


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