[fw-wiz] Question about a Cisco PIX 515 - Routing question (I think)

Charles Norton cnorton at centralnervous.com
Tue Jun 6 09:54:12 EDT 2006


Hello everyone, I apologize if this is a question that has been answered
previously (this is my first time joining the list, and posting to it as
well) - I looked through some of the archives and couldn't find anything
that addressed it (or maybe its likely that I don't know how to properly
describe the issue).



I have a Cisco Pix 515 UR, with PIX 7.04 OS and ASDM 5.04 (the newest of
both). - I had my friend help me setup the box at his datacenter and for
the most part its been working, except I realized recently once we moved
all the servers behind it (they're all Virtual Machines running on a
single box - which should be irrelevant I suppose) the machines were
then unable to communicate with each other using their public IP #'s.


Where this became obvious is that, I have 2 SMTP servers, one Exchange
server and another is part of Plesk Hosting panel - when users on one
system email users on another - they're using the @whatever.com domain
name, which can't be resolved because those servers can't communicate on
the public equivalents of what has been NAT'd to the private network
which resides on 10.0.1.x


A good way to describe is - if I go on a machine, it has IP of
(internal) which is NAT'd to an external IP of (outside) -
coming from the general Internet, if I hit that IP #, I would get a ping
back, as well as a connection to the web server on there. - If I try to
do the same FROM that machine, or from any other machine on the PIX, it
can't find the route to connect.


Does this make sense?


Can anyone maybe offer any advice or guidance in the matter?


If anyone might be able to lend some assistance I would be most


Thank you,




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