Re: [IPCop-user] mail server issue with one remote host

[Andrew M. <and...@af...>]

Hi Td,

Ted Nutt wrote:
> Ok, lets ask some questions
> do you have 1 or more external IPs?

One single static public IP.

> we know (assume)default red, port 25 is fwd to green mail server.
> it would seem you have to have an additional IP, aliased for it to
> port fwd 25 to your orange server

Standard secure setup:
- mail server in ORANGE [dmz]
- port forwarding to mail server as needed [various standard ports including 
25, 465 and 995 with 110 being specifically not allowed and not required].

Ted.... any machine on GREEN can initiate a conversation with any machine on 
the Internet and as the conversation is initiated on GREEN IPCop will 
forward data for the established connection via normal NAT processes 
regardless of any port forwards setup.  The same is true on ORANGE, however, 
as I said before the exception being that ping responses are not allowed to 
the ORANGE [dmz] zone.

Kind Regards

AndrewM

Andrew McGlashan
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