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Failing to DNAT incoming POP3 to mail server

Aydin Pirinccioglu
I'm failing to get an inbound POP3 packets to my mail server.  I have setup all types of DNATs, current one being:

Any > ADSL_Interface / POP3
SRC Translation: none
DST Translation: mail

mail is the internal host with a private IP

I have also tried setting up matching Packet Filter rules:

Any POP3 ADSL_Interface Allow

Any POP3 mail Allow

I even tried using the POP3 Proxy in reverse.

Nothing yet.

Any help would be much appreciated.

Thanks in advance,

Aydin
   


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  • 0
    You  need to set up a NAT/Masq rule AND a packet filter rule.
    My setup:
    NAT/Masq rule
    Name: POP3
    Rule Type: DNAT/SNAT
    Packets to Match:
       Source: Any
       Dest: eth1_Interface__ 
       Service: POP3
    Change Source to:
       Address: No Change
    Change Destination to:
       Address: POP_Server
       Service: No Change

    Packet filter rule:
    From: Any
    Service: POP3
    To: POP_Server
    Rule: Allow

    Hope this helps. 
  • 0 in reply to JimmyM
    Dont forget the responding SNAT rule....

    change source POP3 ==> ADSL_Interface