Re: Cisco PIX fixup protocol command

["erisk" <erisk () iinet net au>]

if the protocols are not in use then disbale the fixups (ie the ones that
are defualt upon install of the PIX). I have found instances where
nmap/superscan can pick up the fixups enabled even if the port is in use...
The implication here is that it can give an indication that a PIX is in use.

If the protocols are used  however (SMTP, FTP, DNS) "fixup" those.. It
provides attack guards over the protocols and inspects the traffic for the
connections.
----- Original Message ----- 
From: "S.Rohit" <s.rohit () usa net>
To: <security-basics () securityfocus com>
Sent: Wednesday, February 11, 2004 6:52 PM
Subject: Cisco PIX fixup protocol command


hi everyone....

   might sound like a very stupid question to ask, but i am looking for info
on wat is the use of fixup protocol commands on the Cisco PIX device. wat is
the exact usage and significance of this commands? and wat are the security
implications of this command? i know that some fixup's like say fixup
protocol
smtp are good cos of the way they restrict the SMTP command set but how
about
the general syntax [no] fixup protocol [service] [port]? what is this used
for
and wat are the security implications for this?

   i am asking this because i'm seeing a recommendation in some PIX
hardening
guide to disable fixups or they flag fixups as a security issue? y is tat?

rohit



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