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    Is it possible to change an alias dynamically?

    Scheduled Pinned Locked Moved Firewalling
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    • R
      rcoleman-netgate Netgate @Tobi
      last edited by

      @tob that list is of known/created interfaces, not aliases.

      Ryan
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      • T
        Tobi @rcoleman-netgate
        last edited by

        @rcoleman-netgate OK and where I can find build in Network aliases?

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        • R
          rcoleman-netgate Netgate @Tobi
          last edited by

          @tobi Firewall->Aliases

          3e0b542d-8efb-4e9b-ba23-717d0ef5786b-image.png

          Then you choose "Alias" in the drop menu and enter the Alias name in the text field next to it on the form.

          Ryan
          Repeat, after me: MESH IS THE DEVIL! MESH IS THE DEVIL!
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          • S
            SteveITS Galactic Empire @Tobi
            last edited by

            @tobi "LAN5 Net" is to what I was referring.

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            • Bob.DigB
              Bob.Dig LAYER 8 @Tobi
              last edited by Bob.Dig

              @tobi said in Is it possible to change an alias dynamically?:

              It would be nice if this could be done automatically.

              You can't. There is a lot to desire when it comes to dynamic IPv6 in pfSense.

              One thing you can do is create an alias from a hostname which is set in a static mapping in the DHCPv6 Server in pfSense, similar to how it works with the DHCPv4 Server. That hostname, and with that, that alias you created, will be updated automatically.

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              • T
                Tobi @Bob.Dig
                last edited by

                Thanks all for the answers.
                I will try if I can achieve everything with the proposal of @SteveITS

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                • Bob.DigB
                  Bob.Dig LAYER 8 @Tobi
                  last edited by

                  @tobi Looking at your screenshot more closely, yes, just use the build in *_net for that, no need for aliases in the first place.

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                  • T
                    Tobi @Bob.Dig
                    last edited by

                    @bob-dig Does not work unfortunately and I have absolutely no idea why at the moment.
                    As soon as I take out the aliases in the FW rules and enter the "lanX" networks, the communication is blocked.
                    Here an example for ICMP

                    1. Works great
                      21-07-_2022_17-09-52.jpg

                    2. Alias definition
                      21-07-_2022_17-10-15.jpg

                    3. Not work anymore
                      21-07-_2022_17-12-02.jpg
                      21-07-_2022_17-13-39.jpg

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                    • Bob.DigB
                      Bob.Dig LAYER 8 @Tobi
                      last edited by

                      @tobi Show us your rule and what you want to achieve.

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                      • S
                        SteveITS Galactic Empire @Bob.Dig
                        last edited by

                        @bob-dig As I understand it, he's trying to create firewall rules for an IPv6 subnet that changes. I was thinking the "Net" interfaces would update with the new IPv6 subnet, though (sorry) I haven't tried that.

                        Ryan @rcoleman-netgate do you know at what point the "Net" interface definition updates if the assigned IPv6 changes? Is it not instant?

                        @Tobi Do you need to know the IPv6 subnet at the point of doing the rules? I mean, can you not just allow or block IPv6 on that interface? Or are you trying to allow one subnet but block another IPv6 subnet routed through it? Also your example was IPv4, though I'd have expected that to work based on your rule. The rule did allow something because it shows 350 bytes.

                        Pre-2.7.2/23.09: Only install packages for your version, or risk breaking it. Select your branch in System/Update/Update Settings.
                        When upgrading, allow 10-15 minutes to restart, or more depending on packages and device speed.
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                        • Bob.DigB
                          Bob.Dig LAYER 8 @SteveITS
                          last edited by

                          @steveits said in Is it possible to change an alias dynamically?:

                          I was thinking the "Net" interfaces would update with the new IPv6 subnet, though (sorry) I haven't tried that.

                          They do or there is no IPv6 connectivity at all.

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                          • T
                            Tobi @Bob.Dig
                            last edited by Tobi

                            @bob-dig
                            21-07-_2022_17-34-44.jpg

                            @bob-dig said in Is it possible to change an alias dynamically?:

                            They do or there is no IPv6 connectivity at all.

                            Here is a ICMP response with my "Yellow_Network" Alias

                            "ping www.google.com

                            Ping wird ausgeführt für www.google.com [2a00:1450:4001:82a::2004] mit 32 Bytes Daten:
                            Antwort von 2a00:1450:4001:82a::2004: Zeit=7ms
                            Antwort von 2a00:1450:4001:82a::2004: Zeit=8ms
                            Antwort von 2a00:1450:4001:82a::2004: Zeit=7ms
                            Antwort von 2a00:1450:4001:82a::2004: Zeit=7ms"

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                            • T
                              Tobi @SteveITS
                              last edited by

                              @steveits said in Is it possible to change an alias dynamically?:

                              The rule did allow something because it shows 350 bytes.

                              Yes, because with the alias (Yellow_network ) ping works, both ipv4 and ipv6

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                              • Bob.DigB
                                Bob.Dig LAYER 8 @Tobi
                                last edited by

                                @tobi Show us what is not working and what you are trying in great detail.

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                                • T
                                  Tobi @Bob.Dig
                                  last edited by

                                  @bob-dig -
                                  I'm trying simple ping (ICMP)

                                  with "lan3 net"
                                  21-07-_2022_17-42-57.jpg

                                  it will not work. All packages are block.

                                  same rule but with my alias "Yellow_Network" all works great.

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                                  • S
                                    SteveITS Galactic Empire @Bob.Dig
                                    last edited by

                                    @bob-dig said in Is it possible to change an alias dynamically?:

                                    @steveits said in Is it possible to change an alias dynamically?:

                                    I was thinking the "Net" interfaces would update with the new IPv6 subnet, though (sorry) I haven't tried that.

                                    They do or there is no IPv6 connectivity at all.

                                    OK well when you write it out like that... :) That's why I suggested LAN3 Net but he's saying it doesn't work, which doesn't make a lot of sense to me.

                                    @Tobi are you sure it's not another rule blocking it? If you click the red X on the log line you'll get a popup like:

                                    "The rule that triggered this action is:
                                    @58(0) block drop in log quick on igb1 from bogonsv6:132925 to any label "block bogon IPv6 networks from WAN" ridentifier 11002"

                                    Pre-2.7.2/23.09: Only install packages for your version, or risk breaking it. Select your branch in System/Update/Update Settings.
                                    When upgrading, allow 10-15 minutes to restart, or more depending on packages and device speed.
                                    Upvote 👍 helpful posts!

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                                      Tobi @SteveITS
                                      last edited by Tobi

                                      @steveits - This rule is not blocking the trafic. But pfSense don't see the source as part of "Lan3 net" -what is not true
                                      LAN3 192.168.4.10/24. My source is 192.168.4.15

                                      And blocking rule is at the end

                                      Red X means:

                                      "Die Regel, die diese Aktion ausgelöst hat, ist:

                                      @480(0) block drop in log quick on igb4 inet from <Yellow_Network:2> to any label "USER_RULE: Deny LAN3" ridentifier 1631830970"
                                      "

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                                      • S
                                        SteveITS Galactic Empire @Tobi
                                        last edited by

                                        @tobi So, it sounds like you have a separate "Deny LAN3" rule that is blocking the pings.

                                        Pre-2.7.2/23.09: Only install packages for your version, or risk breaking it. Select your branch in System/Update/Update Settings.
                                        When upgrading, allow 10-15 minutes to restart, or more depending on packages and device speed.
                                        Upvote 👍 helpful posts!

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                                        • T
                                          Tobi @SteveITS
                                          last edited by

                                          @steveits No. I have many rules they allows things and at the end on each interface I have "Deny Rule for ALL"

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                                          • johnpozJ
                                            johnpoz LAYER 8 Global Moderator @Tobi
                                            last edited by

                                            @tobi said in Is it possible to change an alias dynamically?:

                                            I have "Deny Rule for ALL"

                                            There really is no reason for a deny rule at the end - default is deny. So unless you want to say not log anything you don't allow (default is to log).. There isn't really a reason to add specific block at the end.. Unless you wanted to make it a reject maybe for your local devices so they get a icmp notice that rejected and can save your clients some time doing retrans, etc.

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