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    NAT1:1 Multiple external IPs pointing to same internal IP

    HA/CARP/VIPs
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    • R
      Rapture
      last edited by

      Hi all,

      I know that 1:1 NAT-ing from nulitple external IPs to a single internal IP is not recommended. But could someone please educate me as to why it is not a good idea.

      TIA

      Melvin

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      • jimpJ
        jimp Rebel Alliance Developer Netgate
        last edited by

        Because when traffic goes out, which IP is it supposed to use? Incoming connections may be OK, but outgoing connections would likely never use the second IP, no matter what you do.

        Specific port forwards and outbound NAT rules (or in 2.0 1:1 NAT rules for different IPs but with source/destination restrictions) should be OK, but just putting two whole external IPs to the same internal IP isn't likely to be what you really want to do.

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        • R
          Rapture
          last edited by

          Hi Jim, Thanks for the clarification. Makes perfect sense.

          Melvin

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