Multiple exchange server - to Multiple External IP through one nic

  • I have multiple Exchange servers, each one has an external address, I am trying to do a one to one nat, however what happens I put the exchange server to an external IP I have a block of them, it always says its coming from the Router IP instead of the IP address I assigned.

    So My mail is being blocked. Can anyone help me with this?

    More detail,
    PFSENSE primary WAN x.x.x.3
    exchange 1 Internal IP - external address x.x.x.10
    exchange 2 internal IP - External address x.x.x.12
    exchange 3 internal ip - External address x.x.x.14

    So how do I set up pfsense to respond back to the correct IP? So when I do a check on the IP address from exchange 1 it  comes back x.x.x.10 and not x.x.x.3 cause I am at a loss.


  • LAYER 8 Netgate

    What did you configure?

  • I created a Virtual IP for each server and Each external IP, then I created a 1:1 nat from external Subnet to internal IP, and it still didnt work.

  • LAYER 8 Netgate

    Screen shots of the 1:1 NAT please. What kind of VIP?

  • Here are the Screenshots

  • LAYER 8 Netgate

    That sure looks like it should work.  I rarely have IP addresses to play with and don't do much 1:1.  I trust a 1:1 entry will take precedence over the regular outbound NAT rules.

    I'm not sure about the choice of a Proxy ARP Type.  I'm using ifAlias (because it's a HA pair).  But it should work.

    Are you sure you're not looking at an existing firewall state?  What does in a browser show from the server after you add the 1:1?

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