Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    VLAN an Firewall rule not matching

    Scheduled Pinned Locked Moved L2/Switching/VLANs
    68 Posts 3 Posters 13.1k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • johnpozJ
      johnpoz LAYER 8 Global Moderator @interessierter
      last edited by johnpoz

      @interessierter couple of things.. Wan net is NOT the internet, its just the Wan net.. So no that is not going to allow for internet.

      Since you put in your test rule that is any any - are you seeing blocks?

      Also vs ANY for the source, the any should be set to the "net" of that vlan.. Unless you had downstream networks, and this vlan was transit, should limit the source to the net interface is connected to.

      I don't see any hits on any of those rules either they are all 0/0 - so is your client even talking to pfsense? On this vlan interface?

      An intelligent man is sometimes forced to be drunk to spend time with his fools
      If you get confused: Listen to the Music Play
      Please don't Chat/PM me for help, unless mod related
      SG-4860 24.11 | Lab VMs 2.8, 24.11

      I 1 Reply Last reply Reply Quote 0
      • I
        interessierter @johnpoz
        last edited by

        @johnpoz said in VLAN an Firewall rule not matching:

        @interessierter couple of things.. Wan net is NOT the internet, its just the Wan net.. So no that is not going to allow for internet.

        Since you put in your test rule that is any any - are you seeing blocks?

        Also vs ANY for the source, the any should be set to the "net" of that vlan.. Unless you had downstream networks, and this vlan was transit, should limit the source to the net interface is connected to.

        I don't see any hits on any of those rules either they are all 0/0 - so is your client even talking to pfsense? On this vlan interface?

        I have tried as source everything, that was the last. There is also no change when I set it to the IP address or subnet as source.
        Tried to put ANY ANY, does not change the situation

        I have on the firewall rules 3 tabs, the first one is the main without any VLANS. The screenshot only show the VLAN where my client is in. And yes, this network contains clients that are also working. It feels like that the main rules are blocking this.

        johnpozJ 1 Reply Last reply Reply Quote 0
        • johnpozJ
          johnpoz LAYER 8 Global Moderator @interessierter
          last edited by

          @interessierter said in VLAN an Firewall rule not matching:

          It feels like that the main rules are blocking this.

          The lan rules have ZERO to do with what a vlan can do..

          Let see these blocks your seeing..

          An intelligent man is sometimes forced to be drunk to spend time with his fools
          If you get confused: Listen to the Music Play
          Please don't Chat/PM me for help, unless mod related
          SG-4860 24.11 | Lab VMs 2.8, 24.11

          I 1 Reply Last reply Reply Quote 0
          • I
            interessierter @johnpoz
            last edited by

            @johnpoz I know that there should no relation. But when I have a ANY ANY Rule, and still the log tells me the default rule block the request, than it must be something else

            I 1 Reply Last reply Reply Quote 0
            • I
              interessierter @interessierter
              last edited by

              @interessierter Hm after a restart of pfnblocker it works

              johnpozJ I 2 Replies Last reply Reply Quote 0
              • johnpozJ
                johnpoz LAYER 8 Global Moderator @interessierter
                last edited by

                @interessierter Please show us the blocks... And your rules - I want to see if there is any triggers 0/0 like you showed that none of those rules have matched.

                An intelligent man is sometimes forced to be drunk to spend time with his fools
                If you get confused: Listen to the Music Play
                Please don't Chat/PM me for help, unless mod related
                SG-4860 24.11 | Lab VMs 2.8, 24.11

                I 1 Reply Last reply Reply Quote 0
                • I
                  interessierter @johnpoz
                  last edited by

                  @johnpoz its solved, its working after a reboot of pfnblocker

                  1 Reply Last reply Reply Quote 0
                  • I
                    interessierter @interessierter
                    last edited by

                    @interessierter said in VLAN an Firewall rule not matching:

                    @interessierter Hm after a restart of pfnblocker it works

                    The Part of DHCP is working now.
                    I got a xaomi vacuum cleaner, and this device needs WLAN to work fully. However I want to seperate this device from the rest of my network, but I strugle here.

                    I have created vlans, a seperate WLAN SSID, and tag this SSID of VLAN ID 4000. This is configured on the switch between, the AP and the pfsense. But right now all other devices are NOT tagged with vlans, I have to do that step by step. However I want to start with the new xaomi device.

                    What I want to do is, to allow on the VLAN 4000 only Internet access, but DENY all access to my existing network infrastructure. I have tried several DENY rules on pfsense, but the access is still possible.

                    How should such a rule look like to work?
                    thanks

                    johnpozJ 1 Reply Last reply Reply Quote 0
                    • johnpozJ
                      johnpoz LAYER 8 Global Moderator @interessierter
                      last edited by

                      @interessierter here is a typical common configuration for a locked down vlan

                      lockeddown.jpg

                      Create an alias that contains all the rfc1918 space, this way as you add more vlans you don't have to worry that they would not be blocked.

                      alias.jpg

                      Certain services are normally required like dns, etc.. But if the device points to outside for dns, you could remove that, same with ntp, and if you don't want it to ping its gateway.

                      But this is a very limited vlan setup. It can not talk to anything on local networks, only internet

                      An intelligent man is sometimes forced to be drunk to spend time with his fools
                      If you get confused: Listen to the Music Play
                      Please don't Chat/PM me for help, unless mod related
                      SG-4860 24.11 | Lab VMs 2.8, 24.11

                      I 1 Reply Last reply Reply Quote 1
                      • I
                        interessierter @johnpoz
                        last edited by

                        @johnpoz I have a Alias with 192.168.1.0/24 and this Firewall rule to block:

                        941c799a-9522-4328-9776-499144a2b49e-image.png

                        But the browser access to 192.168.1.30 is still possible. The Test Client is in 10.40.23.99 net.

                        johnpozJ 1 Reply Last reply Reply Quote 0
                        • johnpozJ
                          johnpoz LAYER 8 Global Moderator @interessierter
                          last edited by

                          @interessierter did you clear states after you created a block rule?

                          States are evaluated before rules, so if there was an existing state, that state would allow it before your rules are even looked at.

                          I don't see any triggers on that rule.. It shows 0/0 for states - so it was never evaluated.

                          Do you have any rules in floating that would allow the traffic?

                          An intelligent man is sometimes forced to be drunk to spend time with his fools
                          If you get confused: Listen to the Music Play
                          Please don't Chat/PM me for help, unless mod related
                          SG-4860 24.11 | Lab VMs 2.8, 24.11

                          I 1 Reply Last reply Reply Quote 0
                          • I
                            interessierter @johnpoz
                            last edited by

                            @johnpoz I have found this in the logs. It seems like all traffic will be blocked, only the connection to 192.168.1.30 is working. Why is that threaded differently?

                            64c4cf98-0b39-4ba3-a59b-21170b98a02f-image.png

                            I Bob.DigB 2 Replies Last reply Reply Quote 0
                            • I
                              interessierter @interessierter
                              last edited by

                              @interessierter the other rules on this vlan. No floating rules

                              553b6da7-b88e-42be-a006-6f0f2f8e7b22-image.png

                              johnpozJ 1 Reply Last reply Reply Quote 0
                              • johnpozJ
                                johnpoz LAYER 8 Global Moderator @interessierter
                                last edited by

                                @interessierter well your rule is not triggering, again you have a 0/0 for states..

                                You created your alias wrong maybe..

                                Rules are evaluated top down, first rule to trigger wins.. no other rules are evaluated. If default deny rule is being trigger then non of your rules above it either block or allowed were triggered.

                                As to that lan rule anything from the firewall itself are you natting this vlan for some reason?

                                An intelligent man is sometimes forced to be drunk to spend time with his fools
                                If you get confused: Listen to the Music Play
                                Please don't Chat/PM me for help, unless mod related
                                SG-4860 24.11 | Lab VMs 2.8, 24.11

                                I 1 Reply Last reply Reply Quote 0
                                • I
                                  interessierter @johnpoz
                                  last edited by interessierter

                                  @johnpoz The Alias is correct:

                                  687efef1-b94f-4060-bc08-b0135897c36b-image.png

                                  OK the Block rule was not on the first position, but it does not make any difference. Access is still possible.

                                  What I found is here some old NAT rules from a TEST for VPN:
                                  e70f2d73-0aef-4586-9a05-df0cb7996bd0-image.png

                                  I 1 Reply Last reply Reply Quote 0
                                  • Bob.DigB
                                    Bob.Dig LAYER 8 @interessierter
                                    last edited by Bob.Dig

                                    @interessierter said in VLAN an Firewall rule not matching:

                                    64c4cf98-0b39-4ba3-a59b-21170b98a02f-image.png

                                    Why are those IP ranges identical and why LAN has a triangle. Maybe your NAT rules are wrong? Better show all the NAT rules and Portforwarding too.

                                    Or start with a fresh install. 😉

                                    I 1 Reply Last reply Reply Quote 0
                                    • I
                                      interessierter @Bob.Dig
                                      last edited by

                                      @bob-dig 37abeb86-6405-4ca9-8501-ce145ad54012-image.png

                                      The last 4 lines are created from pfnblocker, is that the reason?

                                      1 Reply Last reply Reply Quote 0
                                      • I
                                        interessierter @interessierter
                                        last edited by

                                        @interessierter said in VLAN an Firewall rule not matching:

                                        @johnpoz The Alias is correct:

                                        687efef1-b94f-4060-bc08-b0135897c36b-image.png

                                        OK the Block rule was not on the first position, but it does not make any difference. Access is still possible.

                                        What I found is here some old NAT rules from a TEST for VPN:
                                        e70f2d73-0aef-4586-9a05-df0cb7996bd0-image.png

                                        I have removed and deleted all VPN and IPSEC configuration however this rules are still there. And this NAT WAN defintily include the subnets that I use for VLAN

                                        johnpozJ 1 Reply Last reply Reply Quote 0
                                        • johnpozJ
                                          johnpoz LAYER 8 Global Moderator @interessierter
                                          last edited by johnpoz

                                          @interessierter any interface that has a gateway and considered a "wan" would auto create outbound nat rules when your in auto mode.

                                          You can see only wan as outbound nat auto.

                                          wan.jpg

                                          I then created a gateway on one of my test interfaces - and it auto created the test outbound nat

                                          test.jpg

                                          If you have some interface with a gateway set, it would create auto outbound nats. If you want to get rid of those you would need to remove this gateway your no longer using.

                                          edit: BTW this firewall entry is the firewall itself creating traffic, not pfsense allowing traffic from 1 vlan to another

                                          thisrule.jpg

                                          An intelligent man is sometimes forced to be drunk to spend time with his fools
                                          If you get confused: Listen to the Music Play
                                          Please don't Chat/PM me for help, unless mod related
                                          SG-4860 24.11 | Lab VMs 2.8, 24.11

                                          I 1 Reply Last reply Reply Quote 0
                                          • I
                                            interessierter @johnpoz
                                            last edited by

                                            @johnpoz I have a second interface thats right, its a power Beam connection that use 10.224.1.14 as IP address, so thats not the subnet of my vlan.

                                            Yes I have my used subnet in the NAT rule, but I don t know why

                                            johnpozJ 1 Reply Last reply Reply Quote 0
                                            • First post
                                              Last post
                                            Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.