RE: Writing custom rule for SSL 401 errors

["McCammon, Keith" <Keith.McCammon () eadvancemed com>]

No can do.  SSL is not a symmetric key system, and the content will look different each time a new session is 
established.

> -----Original Message-----
> From: Eric Joe [mailto:sysop () tje1 com]
> Sent: Tuesday, August 13, 2002 2:24 PM
> To: snort-users () lists sourceforge net
> Subject: [Snort-users] Writing custom rule for SSL 401 errors
>
>
> Hello,
> I am trying to write a snort rule that sends an alert when 
> someone gets a
> 401 "Authorization Required" error while using SSL. I have the non-SSL
> rule working as such
> alert tcp $HTTP_SERVERS $HTTP_PORTS -> $EXTERNAL_NET any (msg:"ATTACK
> RESPONSES Http Failed Authorization"; content: "HTTP/1.\
> 1 401 "; flags:A+; classtype:bad-unknown; sid:1000001; rev:1;)
>
> It works fine, but with SSL encryption I am having trouble with the
> "content" parameter. I guess if I knew what HTTP/1.1 401  
> looked like when
> its encrypted, it would be a piece of cake.
> Anyone have any insight on this?  Thanks in advance.
>
>
> -- 
> Eric Joe
> Network Operations
> Journey's End Internet/Computer Connection Inc
>
>
>
>
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