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    Second Lan network same interface

    Scheduled Pinned Locked Moved General pfSense Questions
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    • johnpozJ
      johnpoz LAYER 8 Global Moderator
      last edited by

      well with those rules.. Then yes anything on lan should be able to ping anything on vlan3..  And vlan3 should be able to ping anything on lan

      For sure the interface on pfsense be it lan or vlan3.

      If you can not ping some client on the other network then is either that client has firewall or maybe it doesn't have pfsense set as its gateway.

      are you saying a device on lan can ping the pfsense lan IP, but it can not ping the vlan3 pfsense interface IP?  I would check your masks on your client and pfsense for your interface IPs.

      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

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      • JKnottJ
        JKnott
        last edited by

        A bit of change.  After creating that single rule, I can now ping the firewall from the desktop via VLAN3 and the desktop from the firewall, but couldn't earlier.  However, when I ping from the notebook to the desktop VLAN interface, I can the incoming ping, with Wireshark, but no response.  However, the source of the incoming ping, from the notebook, is from 172.16.0.40.  Yet I don't see a response on either VLAN or LAN.  Not sure what's happening.  Perhaps the desktop system is getting confused about having 2 routes to the notebook.  I'll have to try creating a separate interface, instead of VLAN3, to see if that eliminates the problem.

        There is a firewall, but turning it off doesn't make any difference.  Both the desktop and notebook are running openSUSE 42.3.

        PfSense running on Qotom mini PC
        i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
        UniFi AC-Lite access point

        I haven't lost my mind. It's around here...somewhere...

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        • DerelictD
          Derelict LAYER 8 Netgate
          last edited by

          Just to clarify, on the pfSense router, the main LAN is 172.16.0.1/24, VLAN3 is 172.16.3.1/24  My desktop system has both LAN (172.16.0.10) and VLAN (172.16.3.10) enabled, but my notebook computer LAN  (172.16.0.40) only.  From the notebook, I can ping 172.16.3.1, but not 172.16.3.10.  From the desktop, when I ping 172.16.3.1, I get no response.

          You will have asymmetry in that case.

          When 172.16.0.40 has traffic for 172.16.3.10 it will send it to the default gateway and it will be routed out the 172.16.3.0 interface.

          That traffic will arrive at 172.16.3.10 sourced from 172.16.0.40.

          When 172.16.3.10 has reply traffic, the proper thing to happen would be for it to be sent back to the 172.16.3.1 for routing but that will not happen. 172.16.3.10 also has an interface in the laptop's local subnet so 172.16.0.10 will ARP for 172.16.0.40 (if necessary) and send the reply traffic directly. I wouldn't say it is confused. It is just doing as it has been told.

          I generally have a few VLAN interfaces on my workstation, too, but I only use them to source connections from there to something else on the local subnet. That way reply traffic is always same-subnet and it works. I never expect it to be routed.

          Chattanooga, Tennessee, USA
          A comprehensive network diagram is worth 10,000 words and 15 conference calls.
          DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
          Do Not Chat For Help! NO_WAN_EGRESS(TM)

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          • JKnottJ
            JKnott
            last edited by

            You will have asymmetry in that case.

            That what I suspected and mentioned in the post above yours.  I'll have to create another interface that I can experiment with.  I just plugged in another NIC, but it doesn't seem to come up.  I'll have to investigate why.  I'm not sure if it's good or not, as it was given to me by a friend years ago.  If not, I'll have to connect my Cisco router and use VLAN3 on it to experiment with.

            Incidentally, that NIC, while listed in the dashboard, doesn't show a MAC or IP address.  The ifconfig command shows a MAC but not IP address.

            You will have asymmetry in that case.

            That what I suspected and mentioned in the post above yours.  I'll have to create another interface that I can experiment with.  I just plugged in another NIC, but it doesn't seem to come up.  I'll have to investigate why.  I'm not sure if it's good or not, as it was given to me by a friend years ago.  If not, I'll have to connect my Cisco router and use VLAN3 on it to experiment with.

            Incidentally, that NIC, while listed in the dashboard, doesn't show a MAC or IP address.  The ifconfig command shows a MAC but not IP address.

            Here's what ifconfig shows.

            em0: flags=8802 <broadcast,simplex,multicast>metric 0 mtu 1500
                    options=209b <rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum,wol_magic>ether 90:e2:ba:4d:d6:b3
                    hwaddr 90:e2:ba:4d:d6:b3
                    nd6 options=21 <performnud,auto_linklocal>media: Ethernet autoselect (1000baseT <full-duplex>)
                    status: active

            And on Status > Interfaces I see this, which I find curious.

            Screenshot_20170907_133736.png
            Screenshot_20170907_133736.png_thumb</full-duplex></performnud,auto_linklocal></rxcsum,txcsum,vlan_mtu,vlan_hwtagging,vlan_hwcsum,wol_magic></broadcast,simplex,multicast>

            PfSense running on Qotom mini PC
            i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
            UniFi AC-Lite access point

            I haven't lost my mind. It's around here...somewhere...

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            • DerelictD
              Derelict LAYER 8 Netgate
              last edited by

              No idea what you are showing us there. that is em0 and bge0.

              A parent interface of a VLAN will show like that if it is not assigned to an interface and numbered.

              igb1 is not assigned in interfaces > assignments:

              igb1: flags=8943 <up,broadcast,running,promisc,simplex,multicast>metric 0 mtu 1500
              options=500bb <rxcsum,txcsum,vlan_mtu,vlan_hwtagging,jumbo_mtu,vlan_hwcsum,vlan_hwfilter,vlan_hwtso>ether 00:08:a2:0a:59:42
              hwaddr 00:08:a2:0a:59:42
              inet6 fe80::208:a2ff:fe0a:5942%igb1 prefixlen 64 scopeid 0x2
              nd6 options=21 <performnud,auto_linklocal>media: Ethernet autoselect (1000baseT <full-duplex>)
              status: active

              VLAN 223 is…

              igb1_vlan223: flags=8943 <up,broadcast,running,promisc,simplex,multicast>metric 0 mtu 1500
              options=3 <rxcsum,txcsum>ether 00:08:a2:0a:59:42
              inet 192.168.223.1 netmask 0xffffff00 broadcast 192.168.223.255
              inet6 2600:dead:beef:cafe:208:a2ff:fe0a:5942 prefixlen 64
              inet6 fe80::1:1%igb1_vlan223 prefixlen 64 scopeid 0xb
              nd6 options=21 <performnud,auto_linklocal>media: Ethernet autoselect (1000baseT <full-duplex>)
              status: active
              vlan: 223 vlanpcp: 0 parent interface: igb1</full-duplex></performnud,auto_linklocal></rxcsum,txcsum></up,broadcast,running,promisc,simplex,multicast></full-duplex></performnud,auto_linklocal></rxcsum,txcsum,vlan_mtu,vlan_hwtagging,jumbo_mtu,vlan_hwcsum,vlan_hwfilter,vlan_hwtso></up,broadcast,running,promisc,simplex,multicast>

              Chattanooga, Tennessee, USA
              A comprehensive network diagram is worth 10,000 words and 15 conference calls.
              DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
              Do Not Chat For Help! NO_WAN_EGRESS(TM)

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              • JKnottJ
                JKnott
                last edited by

                I was showing the LAN4 interface, which doesn't appear to have a MAC address, though it does in ifconfig.  I also don't know why it shows opvpns1 on it.
                Curious.

                PfSense running on Qotom mini PC
                i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                UniFi AC-Lite access point

                I haven't lost my mind. It's around here...somewhere...

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                • DerelictD
                  Derelict LAYER 8 Netgate
                  last edited by

                  Because it is assigned to an OpenVPN instance. Look in Interfaces > (assign).

                  Chattanooga, Tennessee, USA
                  A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                  DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                  Do Not Chat For Help! NO_WAN_EGRESS(TM)

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                  • JKnottJ
                    JKnott
                    last edited by

                    Openvpn was assigned, but I have absolutely no idea how that wound up on there.  I deleted that assignment and created a new one as em0 and it came up.

                    PfSense running on Qotom mini PC
                    i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                    UniFi AC-Lite access point

                    I haven't lost my mind. It's around here...somewhere...

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                    • JKnottJ
                      JKnott
                      last edited by

                      I just came across something curious.  I've set up the new interface for LAN4 and enabled both IPv4 and IPv6.  The IPv6 prefix is within my /56.  When I ping my desktop computer, on it global IPv6 address, it's successful.  When I try on it's ULA, I get a "Destination unreachable: No route" error.  Traceroute show the path ending at 2607:f798:10:10ac:0:690:6325:5193.  I have no idea where that is, but it's certainly not on my network.  Host lookup doesn't provide a host name.  Why is pfSense trying to route a ULA off my network?  Neither "Block private networks and loopback addresses" nor "Block bogon networks" are selected for this interface or main LAN, but both are on the WAN interface.

                      PfSense running on Qotom mini PC
                      i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                      UniFi AC-Lite access point

                      I haven't lost my mind. It's around here...somewhere...

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                      • DerelictD
                        Derelict LAYER 8 Netgate
                        last edited by

                        Does pfSense know that interface has that ULA subnet on it? In other words, is that ULA subnet in the routing table with a destination of that interface?

                        Neither "Block private networks and loopback addresses" nor "Block bogon networks" are selected for this interface or main LAN, but both are on the WAN interface.

                        Those block inbound connections, not outbound. You have to specifically block RFC1918 and ULA from egressing outbound using floating rules on WAN out. At least that's how I like to do it.

                        Chattanooga, Tennessee, USA
                        A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                        DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                        Do Not Chat For Help! NO_WAN_EGRESS(TM)

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                        • JKnottJ
                          JKnott
                          last edited by

                          @Derelict:

                          Does pfSense know that interface has that ULA subnet on it? In other words, is that ULA subnet in the routing table with a destination of that interface?

                          Does it require a specific route to be added?  In Cisco & Linux routers, the interface networks are added automatically, so it's not necessary to specify the route.  The prefix is correct in RA subnets and the computer gets the correct address.

                          Netstat -r doesn't show the ULA route for the LAN or LAN4.  However, the first column, showing networks, is truncated, so the full address is not shown for all networks, but I think all interfaces show the global address routes.

                          PfSense running on Qotom mini PC
                          i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                          UniFi AC-Lite access point

                          I haven't lost my mind. It's around here...somewhere...

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                          • johnpozJ
                            johnpoz LAYER 8 Global Moderator
                            last edited by

                            You wouldn't need to add a route for anything directly connected via pfsense.  But pfsense has to have a ULA address in that prefix on the interface connected to the network your using the ULA on.

                            If you just setup the RA to hand out the ula prefix, pfsense wouldn't have to have an actual ULA address that interface.. So yeah it  would try routing it out its default IPv6 gateway..

                            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

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                            • JKnottJ
                              JKnott
                              last edited by

                              I tried adding a virtual IPv6 address to the LAN interface and it shows in ifconfig.  I can ping it from the pfSense command shell, but not from another computer.  The RAs advertise the ULA network, but not the pfSense interface address.

                              PfSense running on Qotom mini PC
                              i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                              UniFi AC-Lite access point

                              I haven't lost my mind. It's around here...somewhere...

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                              • JKnottJ
                                JKnott
                                last edited by

                                I tried setting up a static route, but the only choices for gateway were the WAN or loopback interfaces.  I couldn't select the actual interface.  When I select the loopback ::1, traceroute shows multiple lines of the firewall address.

                                Is it not possible to get pfSense to route ULA networks?  If not, that is a serious fault, as ULAs are just like RFC1918 IPv4 addresses, in that they can be routed, but not onto the Internet.  I have no problem routing IPv4 RFC1918 addresses properly.

                                PfSense running on Qotom mini PC
                                i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                                UniFi AC-Lite access point

                                I haven't lost my mind. It's around here...somewhere...

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                                • JKnottJ
                                  JKnott
                                  last edited by

                                  I set up the LAN interface as a gateway for the ULA address.  I can ping the interface ULA from my notebook, but pinging the desktop ULA displays "Time Exceeded: Hop limit" and traceroute6 shows the firewall repeatedly and not going beyond it.

                                  PfSense running on Qotom mini PC
                                  i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                                  UniFi AC-Lite access point

                                  I haven't lost my mind. It's around here...somewhere...

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                                  • DerelictD
                                    Derelict LAYER 8 Netgate
                                    last edited by

                                    Just assign an interface address to the interface. It will be connected and therefore in the routing table. No gateways or static routes necessary. pfSense doesn't care if it is routable or ULA. It's just a subnet.

                                    Chattanooga, Tennessee, USA
                                    A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                                    DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                                    Do Not Chat For Help! NO_WAN_EGRESS(TM)

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                                    • JKnottJ
                                      JKnott
                                      last edited by

                                      @Derelict:

                                      Just assign an interface address to the interface. It will be connected and therefore in the routing table. No gateways or static routes necessary. pfSense doesn't care if it is routable or ULA. It's just a subnet.

                                      The LAN interface has both global and ULA addresses on it.  Global addresses work fine.  How do I assign a 2nd address?  I created the subnet on the RA page and even created an alias on the Virtual IPs page.  Ifconfig shows the virtual IP and I can ping it from the pfSense computer, but not from the desktop computer, which has both global and ULA addresses.  The virtual address on the pfSense computer is fd48:1a37:2160::1 and the desktop has fd48:1a37:2160:0:61af:b555:ad10:3fd2

                                      When I ping from pfSense to the desktop, this is what I see.
                                      ping6 fd48:1a37:2160:0:61af:b555:ad10:3fd2
                                      PING6(56=40+8+8 bytes) fd48:1a37:2160::1 –> fd48:1a37:2160:0:61af:b555:ad10:3fd2

                                      There is no response from the desktop.  If I have a static route configured, traceroute keeps cycling through the pfSense computer.  If I don't have a static route configured, it tries to go out to the 'net.

                                      Also, Wireshark does not show any pings, in either direction.  However, the RA contains "ICMPv6 Option (Prefix information : fd48:1a37:2160::1/128)" and "ICMPv6 Option (Prefix information : fd48:1a37:2160::/64)" , so the router ULA address is being advertised.

                                      Either I'm missing something, or ULA routing isn't working properly.  As I mentioned, IPv4 RFC1918 addresses route properly.

                                      The desktop system is running openSUSE 42.3.

                                      PfSense running on Qotom mini PC
                                      i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                                      UniFi AC-Lite access point

                                      I haven't lost my mind. It's around here...somewhere...

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                                      • JKnottJ
                                        JKnott
                                        last edited by

                                        Just to update, I have 3 interfaces as follows
                                        LAN global and ULA
                                        VLAN3 ULA only
                                        LAN4 global only.

                                        From the pfSense computer or a computer on LAN4, I cannot ping the ULA on the desktop on either LAN or VLAN3.  On the pfSense computer, I can ping it's own ULA on both LAN and VLAN3.

                                        PfSense running on Qotom mini PC
                                        i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                                        UniFi AC-Lite access point

                                        I haven't lost my mind. It's around here...somewhere...

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                                        • JKnottJ
                                          JKnott
                                          last edited by

                                          Assigning a virtual IP on the LAN interface caused it to lose the global address.  There's definitely something wrong with the way pfSense handles ULA.

                                          PfSense running on Qotom mini PC
                                          i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                                          UniFi AC-Lite access point

                                          I haven't lost my mind. It's around here...somewhere...

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                                          • DerelictD
                                            Derelict LAYER 8 Netgate
                                            last edited by

                                            IDK, man. I just did it and it worked fine.

                                            DHCP WAN, Track Interface LAN, ULA IP Alias VIP /64 on LAN, Added ULA /64 as a subnet for RA on LAN, firewall rule passing all traffic from ULA::/64 on LAN, booted test VM:

                                            pfSense LAN:
                                            re0: flags=8843 <up,broadcast,running,simplex,multicast>metric 0 mtu 1500
                                            options=80098 <vlan_mtu,vlan_hwtagging,vlan_hwcsum,linkstate>ether fe:e0:54:6e:79:49
                                            hwaddr fe:e0:54:6e:79:49
                                            inet 172.25.233.1 netmask 0xffffff00 broadcast 172.25.233.255
                                            inet6 2001:dead:beef:fd01:fce0:54ff:fe6e:7949 prefixlen 64
                                            inet6 fe80::1:1%re0 prefixlen 64 scopeid 0x1
                                            inet6 fd08:1e26:8fea:525b::1 prefixlen 64
                                            nd6 options=21 <performnud,auto_linklocal>media: Ethernet autoselect (100baseTX <full-duplex>)
                                            status: active

                                            Test host interface:
                                            derelict@Host-B1:~$ ifconfig
                                            eth0      Link encap:Ethernet  HWaddr 9a:b3:de:87:fa:4b 
                                                      inet addr:172.25.233.100  Bcast:172.25.233.255  Mask:255.255.255.0
                                                      inet6 addr: fd08:1e26:8fea:525b:98b3:deff:fe87:fa4b/64 Scope:Global
                                                      inet6 addr: fe80::98b3:deff:fe87:fa4b/64 Scope:Link
                                                      inet6 addr: 2001:dead:beef:fd01:98b3:deff:fe87:fa4b/64 Scope:Global
                                                      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
                                                      RX packets:205 errors:0 dropped:0 overruns:0 frame:0
                                                      TX packets:122 errors:0 dropped:0 overruns:0 carrier:0
                                                      collisions:0 txqueuelen:1000
                                                      RX bytes:34081 (34.0 KB)  TX bytes:15844 (15.8 KB)

                                            To pfSense LAN VIP:
                                            derelict@Host-B1:~$ ping6 -c 3 -I fd08:1e26:8fea:525b:98b3:deff:fe87:fa4b fd08:1e26:8fea:525b::1
                                            PING fd08:1e26:8fea:525b::1(fd08:1e26:8fea:525b::1) from fd08:1e26:8fea:525b:98b3:deff:fe87:fa4b : 56 data bytes
                                            64 bytes from fd08:1e26:8fea:525b::1: icmp_seq=1 ttl=64 time=0.518 ms
                                            64 bytes from fd08:1e26:8fea:525b::1: icmp_seq=2 ttl=64 time=0.294 ms
                                            64 bytes from fd08:1e26:8fea:525b::1: icmp_seq=3 ttl=64 time=0.684 ms

                                            –- fd08:1e26:8fea:525b::1 ping statistics ---
                                            3 packets transmitted, 3 received, 0% packet loss, time 1998ms
                                            rtt min/avg/max/mdev = 0.294/0.498/0.684/0.161 ms

                                            To the WAN address of upstream pfSense:
                                            derelict@Host-B1:~$ ping6 -c 3 -I fd08:1e26:8fea:525b:98b3:deff:fe87:fa4b 2001:dead:beef:7fff::ed96:eec5
                                            PING 2001:dead:beef:7fff::ed96:eec5(2001:dead:beef:7fff::ed96:eec5) from fd08:1e26:8fea:525b:98b3:deff:fe87:fa4b : 56 data bytes
                                            64 bytes from 2001:dead:beef:7fff::ed96:eec5: icmp_seq=1 ttl=64 time=0.524 ms
                                            64 bytes from 2001:dead:beef:7fff::ed96:eec5: icmp_seq=2 ttl=64 time=0.287 ms
                                            64 bytes from 2001:dead:beef:7fff::ed96:eec5: icmp_seq=3 ttl=64 time=0.320 ms

                                            –- 2001:dead:beef:7fff::ed96:eec5 ping statistics ---
                                            3 packets transmitted, 3 received, 0% packet loss, time 2000ms
                                            rtt min/avg/max/mdev = 0.287/0.377/0.524/0.104 ms

                                            I don't have routing for that ULA from anything else.

                                            Note this is a recent 2.4-RC since that's what my test environment is currently running.</full-duplex></performnud,auto_linklocal></vlan_mtu,vlan_hwtagging,vlan_hwcsum,linkstate></up,broadcast,running,simplex,multicast>

                                            Chattanooga, Tennessee, USA
                                            A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                                            DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                                            Do Not Chat For Help! NO_WAN_EGRESS(TM)

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