Not sure if I understand so I'm going to try and interpret what you said. I
likewise, do not have a DMZ. Everything is mapped thru a Cisco PIX firewall
using NAT. I chose not to use the imail database anyway because I do not
necessarily want to give an email account to every IM user.  However, I am
using the same IP address as my web server. I didn't think that port 80
traffic and port 5177/78 traffic would interfere with one another. Also, I'm
running short on public IP's. But, are you saying that you created a DNS
entry with a new public IP that you mapped through your firewall to you
server and that is the ip you used in the NAT host box in IM_server??
See...,I told you I didn't understand.

Thanks

James

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Smart
Business Lists
Sent: Wednesday, February 12, 2003 4:52 PM
To: James Hyde
Subject: Re: [IpswitchIM_Forum] NAT Problems and Solutions


James,

Wednesday, February 12, 2003 you wrote:
JH> How then, did you route traffic to your server if yor DNS is pointing to
JH> your firewall?? Did you map your gateway address to your server?? That
would
JH> cause me great security concerns.

We don't have a dmz - just inside and outside.  The mail server as
well as most everything else is inside so it takes a NAT to get to it.

So I wanted to use the IMAIL server database.  But when the IM tried
to send data back to the sender it tried to go back on the external
connection of the mail server (and there are more than one since
therre are both IP-less and IP-ful domains).  But of course this is
not possible since there is only one gateway from the mail server to
the firewall.  So users could connect and users could talk to other
users but they could not see what they were typing themselves.  And so
sometimes there would be 2 message boxes open.

So I solved it by eliminating IMAIL period and setting up the IM
database.  Then I made a DNS entry for im.example.com and put that in
the gateway.  I made a new NAT entry then for that dns external so
that the back route was always going to the user.  And that worked.

Now the dev machine I tried it on first is just a single bastion host
(loosely called) with IPSEC.  And on that machine I had to open both
5177 incoming  and 5178 outgoing to make it work but I was able to
make the IMAIL server work on it.


Terry Fritts


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