Different NAT translations on incoming and outgoing direction
I have the following situation on a router. I have a mail relay agent(10.0.0.5) and I have to translate port 25 of my global address x.x.x.x:25 to it. The mail relay agent sends the received mail to the mail server which has the address 10.0.0.6. Then the mail server sends messages directly to the internet and I have to translate its address to the global x.x.x.x:25. It looks like this:
Message arrives at x.x.x.x:25 translates to -> 10.0.0.5:25. Then 10.0.0.5 sends mails to 10.0.0.6(mail server).
When 10.0.0.6(mail server) sends mail to the internet translates to -> x.x.x.x:25
Basically I have to translate the public x.x.x.x:25 to 10.0.0.5 when it enters the outside interface and translate 10.0.0.6 to x.x.x.x:25 when it goes out the interface.
I will be very garetful if somebody can help with that configuration issue. Regards,
Re: Different NAT translations on incoming and outgoing directio
That is a correct configuration but when you have an outbound connection
server's address 10.0.0.6 will get translated with a random port, not port 25, since it is staticaly reserved from the statement ip nat inside source tcp 10.0.0.5 25 x.x.x.x 25. I need to keep port 25 as well. Ivaylo
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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