[Snort-users] Writing custom rule for SSL 401 errors

Stefan Dens stefan.dens at ...1187...
Fri Aug 16 14:32:08 EDT 2002


Hi,

It is inpossible to write a rule for ssl, if a webserver would encrypt with
a default encryption key then the whole SSL concept would not exists.

Sorry,
Stefan Dens

----- Original Message -----
From: "Eric Joe" <sysop at ...6291...>
To: <snort-users at lists.sourceforge.net>
Sent: Tuesday, August 13, 2002 8:23 PM
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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