Re: Signature for IPSec encrypted VPN tunnel

[Brian <bmc () snort org>]

On Mon, Mar 03, 2003 at 05:44:15PM -0500, Matt Kettler wrote:
> Unfortunately snort currently doesn't understand the idea of protocols 
> other than ip, tcp, udp or arp. It would be nice to be able to do something 
> like:
>
> alert ip any any -> any any (transportprotocol:50; msg:"Ipsec ESP data";)
> alert ip any any -> any any (transportprotocol:51; msg:"Ipsec AH data";)

You mean like this?

alert ip any any -> any any (ip_proto:50; msg:"Ipsec ESP data";)
alert ip any any -> any any (ip_proto:51; msg:"Ipsec AH data";)

-brian


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