firewall IP as Originating IP for emails

[Mrs. Geeta Thanu]

Hi Setve,
I also feel the same.what is wrong with the DNS entry.
DNS is inside firewall(LAN) and it does not have th IP of firewall.

I am totally confused about the problem.
waiting for your replies

Thanks
Geetha

On Thu, 9 Sep 2004, Steve Cowles wrote:

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> On Stardate 6609.08, Mrs. Geeta Thanu said:
> | Hi Gurus,
> |
> | We have our primary DNS , webserver, email server everything inside
> | firewall, all natted to WAN IP.
> |
> | Hence our mails are having the originating IP as firewall's IP ad hence
> | some domains are rejecting our mails.
> |
> | The webserver and email servers IP are same since they both are on the
> | same machine.
> |
> | can anybody please guide me what rules I am doing mistake in firewall and
> | how this problem can be solved.
>
> Based on my understanding of the above (nat'd), all outbound packets
> from any system behind your firewall *should* have their source IP
> address rewritten to the public IP address of your firewall.
>
> Exactly what rejection is being logged by *some domains* as you stated
> above? Can you show the DSN or a logfile entry from maillog? Since you
> state *some domains* are rejecting e-mail, I suspect that this could be
> a DNS PTR record problem, not a firewall rule problem.
>
> - --
> Steve Cowles
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