On 1/29/2018 4:09 PM, jin&hitman&Barracuda wrote:
We are tring to move our mx server to another isp. They gave us an IP address but there is some strange points. When i try to connect any mail related port on that ip, it send my connection to our new postfix server. There is a destination nat on it. It is strange becouse i can't see my actual source ip. I tried with many different hosts and It looks like there is a source nat and i saw same ip as my source ip wherever i try.

From new postfix server,  when i try to reach any server on internet, i see another ip address on the source ip field and it is fixed too.

I believe there is a mistake. Could it be feasible two different ip for incoming and outgoing on one mx server ?
With NAT it could definitely be possible.  What's your machines local ip address with ifconfig?  Is it a reserved private address?

Regards,
KAM

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