NATTing experiment: Is this possible?

supercell29 — Mon, 11 Mar 2019 21:49:34 GMT

Hello,

I will preface this discussion by saying that I'm not sure if this is even possible. On my 5520 I am trying to use one NAT to route all inbound traffic to one private ip (SMTP) and using the same NAT point all outbound traffic from another private ip (SMTP. See attachment). If not I guess I would have to create two separate NAT's (one inbound to outbound and a separate outbound to inbound).

Thank you in advance for your suggestions!

NATTing experiment: Is this possible?

Maykol Rojas — Sat, 12 Nov 2011 23:29:55 GMT

If I understand correctly, I guess you can... however, SMTP Inbound connections of SMTP will always use the first NAT. Look at the example below:

object network smtp-server

host x.x.x.x

object network NAT-IP-1

host y.y.y.y

object network NAT-IP-2

host z.z.z.z

object service SMTP

service tcp destination eq 25

Nat (inside,outside) source static smtp-server NAT-IP-1 service SMTP SMTP

Nat (inside,outside) source dynamic smtp-server NAT-IP-2

That way, all inbound traffic for SMTP will use NAT-IP-1 and the rest of the outbound traffic from STMP server will use NAT-IP-2.

Let me know if that is what you needed.

Mike

topic NATTing experiment: Is this possible? in Network Security

NATTing experiment: Is this possible?

NATTing experiment: Is this possible?