I wish it were that easy - this is a biz-class DSL connection, so all 
ports sail right through, as they should.  The existing mail & web 
server has been in operation for a couple of years and still works this 
morning...

Chris Bagnall wrote:

>I concur with James - my m0n0 box at home has both ports 25 and 80 answering
>on the WAN interface quite successfully.
>
>Can I suggest trying to run the NAT rules you were planning on running on
>ports 26 and 81 respectively, and see if they work that way.
>
>Unfortunately, these days it's not uncommon for ISPs to block port 25. A
>sign of the virus/trojan-infested times I guess. In fact, it's becoming
>quite a challenge to find ISPs that *don't* block port 25.
>
>Regards,
>
>Chris
>  
>