Jason Haar wrote:

> I'm trying to scan our DMZ using Nessus. The PIX in front appears to have a
> charming feature whereby it delays returns RSETs and changes the order of
> them too. This appears to only kick in if the PIX receives more than one
> such erroneous packet from a host in a small period of time.

Since when are RSET packets erroneous? They are very valid and a useful 
part of TCP communication. I don't see why a PIX would want to delay 
and/or reorder them (unless you're being flooded with them, but even 
then..).

With the risk of being flamed: I've used nessus from behind a Checkpoint 
FW-1 using NAT without any problems.

Sincerely,

-- 
Richard van den Berg, CISSP

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