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    Virtual IP and Outbound NAT

    Scheduled Pinned Locked Moved NAT
    13 Posts 2 Posters 6.8k Views
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    • GruensFroeschliG
      GruensFroeschli
      last edited by

      Yes this is possible.

      We do what we must, because we can.

      Asking questions the smart way: http://www.catb.org/esr/faqs/smart-questions.html

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      • I
        idmax
        last edited by

        Nice and how setup outbound rule please?

        @GruensFroeschli:

        Yes this is possible.

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        • GruensFroeschliG
          GruensFroeschli
          last edited by

          firewall –> NAT --> "outbound"
          enable "Manual Outbound NAT"

          Create rules according to your needs.
          In the field "translation" you can set the VIP.

          We do what we must, because we can.

          Asking questions the smart way: http://www.catb.org/esr/faqs/smart-questions.html

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          • I
            idmax
            last edited by

            Yes, i was setup rule:

            Interface: WAN
            Source: 10.0.0.101 (internal IP of the server with public virtual ip 82.82.82.101) mask /32
            Dastination: 72.14.207.99 (example google site where i look as IP 82.82.82.100) mask /32
            Translation: "Interfaces address", port empty
            Description: test

            and not working, it is wrong?

            Thanks

            @GruensFroeschli:

            firewall –> NAT --> "outbound"
            enable "Manual Outbound NAT"

            Create rules according to your needs.
            In the field "translation" you can set the VIP.

            1 Reply Last reply Reply Quote 0
            • GruensFroeschliG
              GruensFroeschli
              last edited by

              In the field "translation" you can set the VIP.

              You need to create a VIP first.

              We do what we must, because we can.

              Asking questions the smart way: http://www.catb.org/esr/faqs/smart-questions.html

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              • I
                idmax
                last edited by

                Yes, but i want map outbound traffic from server .101 to interface ip (real WAN IP), in this case 82.82.82.100

                @GruensFroeschli:

                In the field "translation" you can set the VIP.

                You need to create a VIP first.

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                • GruensFroeschliG
                  GruensFroeschli
                  last edited by

                  Ah you mean you want that the 1:1 NATed server gets NAT outbound via the main WAN?

                  That's not possible.
                  The concept of 1:1 NAT is that you NAT bidirectional all ports.

                  But you can achieve that with normal NAT.

                  1: delete the 1:1 NAT entry.
                  2: Create a normal NAT entry with a port-range from 1 to 65535 to your server and as "external address" your VIP.

                  We do what we must, because we can.

                  Asking questions the smart way: http://www.catb.org/esr/faqs/smart-questions.html

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                  • I
                    idmax
                    last edited by

                    Yes, exactly, thank you very much for your help.

                    @GruensFroeschli:

                    Ah you mean you want that the 1:1 NATed server gets NAT outbound via the main WAN?

                    That's not possible.
                    The concept of 1:1 NAT is that you NAT bidirectional all ports.

                    But you can achieve that with normal NAT.

                    1: delete the 1:1 NAT entry.
                    2: Create a normal NAT entry with a port-range from 1 to 65535 to your server and as "external address" your VIP.

                    1 Reply Last reply Reply Quote 0
                    • GruensFroeschliG
                      GruensFroeschli
                      last edited by

                      Sorry i was under the impression that you want to NAT the other clients besides thet 1:1 NATed server over the VIP too.

                      But why are you using 1:1 NAT in the first place?
                      IMO 1:1 NAT is bad.
                      If you have to forward many many single ports, just create an alias which contains all your ports and use this alias in the normal NAT rule.

                      We do what we must, because we can.

                      Asking questions the smart way: http://www.catb.org/esr/faqs/smart-questions.html

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                      • I
                        idmax
                        last edited by

                        @GruensFroeschli:

                        Sorry i was under the impression that you want to NAT the other clients besides thet 1:1 NATed server over the VIP too.

                        But why are you using 1:1 NAT in the first place?
                        IMO 1:1 NAT is bad.
                        If you have to forward many many single ports, just create an alias which contains all your ports and use this alias in the normal NAT rule.

                        For my is 1:1 better for administration and same security risk as port nat.

                        Example:If i want open port for new service, then:

                        1:1NAT - Open only firewall
                        PORTFW - Open firewall and setup portworward (edit alias)

                        This is my idea….

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                        • GruensFroeschliG
                          GruensFroeschli
                          last edited by

                          You can use aliases in the firewall rules as well as in the NAT rules.

                          Meaning if you need to add/forward new ports you just have to change the alias and nothing else.

                          But i disagree that 1:1 NAT is more secure.
                          If anything then it's less "secure" because you forward everything per default and only the firewall blocks connection attempts which are unallowed.

                          We do what we must, because we can.

                          Asking questions the smart way: http://www.catb.org/esr/faqs/smart-questions.html

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                          • I
                            idmax
                            last edited by

                            Good idea :) use same aliases for firewall and nat, thanks. In this case is better use portforward.

                            No more secure, but same as PortForward i think. Both is protected over firewall,. Only if fail firewall then can by more security issue use 1:1.

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