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    pfSense VM on Proxmox: PPPoE only works when parent NIC is PCI passthrough — virtual NIC breaks LAN→WAN traffic

    Scheduled Pinned Locked Moved Plus 25.11 Snapshots
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    • N Online
      netblues @w0w
      last edited by netblues

      @w0w I have now created a fresh default install
      Directly install 25.11rc from netgate installer , configured everything by the gui just for a single lan, and a single pppoe connection.

      Automatic outbound nat etc. No changes anywhere

      ping works, everything else on physical lan fails (miserably)
      pfsense (and anything on virtual) can install packages, and has full Internet

      have tried disabling checksums too. No dice

      ifconfig vtnet1
      vtnet1: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
         description: WAN
         options=8800a8<VLAN_MTU,JUMBO_MTU,VLAN_HWCSUM,LINKSTATE,HWSTATS>
         ether d4:5d:64:08:66:46
         inet6 fe80::d65d:64ff:fe08:6646%vtnet1 prefixlen 64 scopeid 0x2
         media: Ethernet autoselect (10Gbase-T <full-duplex>)
         status: active
         nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
      
      pppoe0: flags=10088d1<UP,POINTOPOINT,RUNNING,NOARP,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1492
         description: Ftth1G
         options=0
         inet 100.79.101.245 --> 10.106.108.100 netmask 0xffffffff
         inet6 fe80::d65d:64ff:fe08:6646%pppoe0 prefixlen 64 scopeid 0x7
         nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
      

      As a side note, when restoring configuration to a fresh install 25.11rc, all packages got reinstalled, however the widget says no packages.
      I have tried removing it and adding again. Nada.
      Tried adding a new package (from gui), package got installed the widget insists. No packages installed.

      Steps to reproduce. Install fresh pfplus 25.11rc, restore config that has package widget and some packages, wait for the packages reinstallation, and voila !

      w0wW 1 Reply Last reply Reply Quote 0
      • w0wW Offline
        w0w @netblues
        last edited by w0w

        @netblues
        You forgot to show your ifconfig LAN output.

        loader.conf.local (you need to reboot after making changes)

        hw.vtnet.altq_disable=1
        hw.vtnet.tso_disable=1
        hw.vtnet.csum_disable=1
        

        LAN

        ix0: flags=1008943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
        	options=4813828<VLAN_MTU,JUMBO_MTU,WOL_UCAST,WOL_MCAST,WOL_MAGIC,VLAN_HWFILTER,HWSTATS,MEXTPG>
        	ether a0:3------25
        	inet6 fe80::aab8:e0ff:fe02:655a%ix0 prefixlen 64 scopeid 0x1
        	media: Ethernet autoselect (10Gbase-T <full-duplex>)
        	status: active
        	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
        

        WAN parent

        vtnet0: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
        	options=880008<VLAN_MTU,LINKSTATE,HWSTATS>
        	ether a-----:24
        	inet6 fe80::aab8:e0ff:fe02:655a%vtnet0 prefixlen 64 scopeid 0x6
        	media: Ethernet autoselect (10Gbase-T <full-duplex>)
        	status: active
        	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
        

        Shell Output - sysctl hw.vtnet.

        hw.vtnet.altq_disable: 1
        hw.vtnet.lro_mbufq_depth: 0
        hw.vtnet.lro_entry_count: 128
        hw.vtnet.rx_process_limit: 1024
        hw.vtnet.tso_maxlen: 65535
        hw.vtnet.mq_max_pairs: 32
        hw.vtnet.mq_disable: 0
        hw.vtnet.lro_disable: 1
        hw.vtnet.tso_disable: 1
        hw.vtnet.fixup_needs_csum: 0
        hw.vtnet.csum_disable: 1
        

        Side note — if you have vlans on LAN you should not use -vlanhwtag posted previously, this will break vlans

        N 1 Reply Last reply Reply Quote 0
        • N Online
          netblues @w0w
          last edited by

          @w0w
          All vlan configuration is handled at the hypervisor level.
          pf sees only virtual interfaces.

          Here is the output

          sysctl hw.vtnet
          hw.vtnet.altq_disable: 1
          hw.vtnet.lro_mbufq_depth: 0
          hw.vtnet.lro_entry_count: 128
          hw.vtnet.rx_process_limit: 1024
          hw.vtnet.tso_maxlen: 65535
          hw.vtnet.mq_max_pairs: 32
          hw.vtnet.mq_disable: 0
          hw.vtnet.lro_disable: 1
          hw.vtnet.tso_disable: 1
          hw.vtnet.fixup_needs_csum: 0
          hw.vtnet.csum_disable: 1
          
          ifconfig vtnet0
          vtnet0: flags=1008943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
             options=880028<VLAN_MTU,JUMBO_MTU,LINKSTATE,HWSTATS>
             ether 52:54:00:05:01:fb
             inet 192.168.31.3 netmask 0xffffff00 broadcast 192.168.31.255
             inet6 fe80::5054:ff:fe05:1fb%vtnet0 prefixlen 64 scopeid 0x1
             media: Ethernet autoselect (10Gbase-T <full-duplex>)
             status: active
             nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
          
          w0wW 2 Replies Last reply Reply Quote 0
          • w0wW Offline
            w0w @netblues
            last edited by

            @netblues
            I kinda screwed up… I forgot to mention that this ix0 is part of a LAGG interface, and the LAN itself is using that LAGG. This shouldn’t really affect anything, but I’ll check if that’s the issue. Also, I don’t remember changing any settings for this NIC on the host, I think I left it as is.

            1 Reply Last reply Reply Quote 0
            • w0wW Offline
              w0w
              last edited by

              Configured LAN to use ix0 directly — nothing changed.

              1 Reply Last reply Reply Quote 0
              • w0wW Offline
                w0w @netblues
                last edited by w0w

                @netblues said in pfSense VM on Proxmox: PPPoE only works when parent NIC is PCI passthrough — virtual NIC breaks LAN→WAN traffic:

                JUMBO_MTU

                Hmm… I don't see any jumbo settings on my vtnet interfaces, did you change something? VM setiings? Nonstandard MTU?

                Now I have configured it directly for both pppoe and LAN

                vtnet0: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
                	options=880008<VLAN_MTU,LINKSTATE,HWSTATS>
                	ether a-
                	inet6 fe80::aab8:e0ff:fe02:655a%vtnet0 prefixlen 64 scopeid 0x5
                	media: Ethernet autoselect (10Gbase-T <full-duplex>)
                	status: active
                	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
                vtnet1: flags=1008943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
                	description: LAN
                	options=880008<VLAN_MTU,LINKSTATE,HWSTATS>
                	ether a-
                	inet 10.0.67.2 netmask 0xffffff00 broadcast 10.0.67.255
                	inet 10.0.67.5 netmask 0xffffff00 broadcast 10.0.67.255 vhid 5
                	inet 10.0.70.5 netmask 0xffffff00 broadcast 10.0.70.255 vhid 10
                	inet 10.0.70.11 netmask 0xffffff00 broadcast 10.0.70.255
                	inet6 fe80::a236:9fff:fef8:f225%vtnet1 prefixlen 64 scopeid 0x6
                	inet6 fd00:1234:abcd:1::2 prefixlen 64
                	inet6 fd00:1234:abcd:1::5 prefixlen 64 vhid 12
                	carp: MASTER vhid 5 advbase 5 advskew 100
                	      peer 224.0.0.18 peer6 ff02::12
                	carp: MASTER vhid 10 advbase 5 advskew 100
                	      peer 224.0.0.18 peer6 ff02::12
                	carp: MASTER vhid 12 advbase 5 advskew 100
                	      peer 224.0.0.18 peer6 ff02::12
                	media: Ethernet autoselect (10Gbase-T <full-duplex>)
                	status: active
                	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
                

                Ok, I've changed MTU to 9000 in proxmox for the LAN card/bridge/vtnet

                vtnet1: flags=1008943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST,LOWER_UP> metric 0 mtu 1500
                	description: LAN
                	options=880028<VLAN_MTU,JUMBO_MTU,LINKSTATE,HWSTATS>
                

                Still working for me… no problem.

                Proxmox settings for WAN parent

                :~# ethtool -k enp6s0f0
                Features for enp6s0f0:
                rx-checksumming: on
                tx-checksumming: on
                        tx-checksum-ipv4: off [fixed]
                        tx-checksum-ip-generic: on
                        tx-checksum-ipv6: off [fixed]
                        tx-checksum-fcoe-crc: on [fixed]
                        tx-checksum-sctp: on
                scatter-gather: on
                        tx-scatter-gather: on
                        tx-scatter-gather-fraglist: off [fixed]
                tcp-segmentation-offload: on
                        tx-tcp-segmentation: on
                        tx-tcp-ecn-segmentation: off [fixed]
                        tx-tcp-mangleid-segmentation: off
                        tx-tcp6-segmentation: on
                        tx-tcp-accecn-segmentation: off [fixed]
                generic-segmentation-offload: on
                generic-receive-offload: on
                large-receive-offload: off
                rx-vlan-offload: on
                tx-vlan-offload: on
                ntuple-filters: off
                receive-hashing: on
                highdma: on [fixed]
                rx-vlan-filter: on
                vlan-challenged: off [fixed]
                tx-gso-robust: off [fixed]
                tx-fcoe-segmentation: on [fixed]
                tx-gre-segmentation: on
                tx-gre-csum-segmentation: on
                tx-ipxip4-segmentation: on
                tx-ipxip6-segmentation: on
                tx-udp_tnl-segmentation: on
                tx-udp_tnl-csum-segmentation: on
                tx-gso-partial: on
                tx-tunnel-remcsum-segmentation: off [fixed]
                tx-sctp-segmentation: off [fixed]
                tx-esp-segmentation: on
                tx-udp-segmentation: on
                tx-gso-list: off [fixed]
                tx-nocache-copy: off
                loopback: off [fixed]
                rx-fcs: off [fixed]
                rx-all: off
                tx-vlan-stag-hw-insert: off [fixed]
                rx-vlan-stag-hw-parse: off [fixed]
                rx-vlan-stag-filter: off [fixed]
                l2-fwd-offload: off
                hw-tc-offload: off
                esp-hw-offload: on
                esp-tx-csum-hw-offload: on
                rx-udp_tunnel-port-offload: on
                tls-hw-tx-offload: off [fixed]
                tls-hw-rx-offload: off [fixed]
                rx-gro-hw: off [fixed]
                tls-hw-record: off [fixed]
                rx-gro-list: off
                macsec-hw-offload: off [fixed]
                rx-udp-gro-forwarding: off
                hsr-tag-ins-offload: off [fixed]
                hsr-tag-rm-offload: off [fixed]
                hsr-fwd-offload: off [fixed]
                hsr-dup-offload: off [fixed]
                

                LAN

                 ethtool -k enp6s0f1
                Features for enp6s0f1:
                rx-checksumming: on
                tx-checksumming: on
                        tx-checksum-ipv4: off [fixed]
                        tx-checksum-ip-generic: on
                        tx-checksum-ipv6: off [fixed]
                        tx-checksum-fcoe-crc: on [fixed]
                        tx-checksum-sctp: on
                scatter-gather: on
                        tx-scatter-gather: on
                        tx-scatter-gather-fraglist: off [fixed]
                tcp-segmentation-offload: on
                        tx-tcp-segmentation: on
                        tx-tcp-ecn-segmentation: off [fixed]
                        tx-tcp-mangleid-segmentation: off
                        tx-tcp6-segmentation: on
                        tx-tcp-accecn-segmentation: off [fixed]
                generic-segmentation-offload: on
                generic-receive-offload: on
                large-receive-offload: off
                rx-vlan-offload: on
                tx-vlan-offload: on
                ntuple-filters: off
                receive-hashing: on
                highdma: on [fixed]
                rx-vlan-filter: on
                vlan-challenged: off [fixed]
                tx-gso-robust: off [fixed]
                tx-fcoe-segmentation: on [fixed]
                tx-gre-segmentation: on
                tx-gre-csum-segmentation: on
                tx-ipxip4-segmentation: on
                tx-ipxip6-segmentation: on
                tx-udp_tnl-segmentation: on
                tx-udp_tnl-csum-segmentation: on
                tx-gso-partial: on
                tx-tunnel-remcsum-segmentation: off [fixed]
                tx-sctp-segmentation: off [fixed]
                tx-esp-segmentation: on
                tx-udp-segmentation: on
                tx-gso-list: off [fixed]
                tx-nocache-copy: off
                loopback: off [fixed]
                rx-fcs: off [fixed]
                rx-all: off
                tx-vlan-stag-hw-insert: off [fixed]
                rx-vlan-stag-hw-parse: off [fixed]
                rx-vlan-stag-filter: off [fixed]
                l2-fwd-offload: off
                hw-tc-offload: off
                esp-hw-offload: on
                esp-tx-csum-hw-offload: on
                rx-udp_tunnel-port-offload: on
                tls-hw-tx-offload: off [fixed]
                tls-hw-rx-offload: off [fixed]
                rx-gro-hw: off [fixed]
                tls-hw-record: off [fixed]
                rx-gro-list: off
                macsec-hw-offload: off [fixed]
                rx-udp-gro-forwarding: off
                hsr-tag-ins-offload: off [fixed]
                hsr-tag-rm-offload: off [fixed]
                hsr-fwd-offload: off [fixed]
                hsr-dup-offload: off [fixed]
                
                N 1 Reply Last reply Reply Quote 0
                • N Online
                  netblues @w0w
                  last edited by

                  @w0w I see minor differences on the physical kvm interface, but I haven't done anything special, its at defaults.

                  The mtu has been adjusted to 1508, but that can't be the issue. In any case, the brigded interfaces all use 1500 as mtu.

                  As is, the same bridges are used at the same time by pfpls @25.07 pfplus @25.11rc and pfCE 2.8.1 with multiple pppoe connections over the same parent vlam.

                  Only new rc fails to work as described above.

                  ethtool -k enp1s0.31
                  Features for enp1s0.31:
                  rx-checksumming: off [fixed]
                  tx-checksumming: on
                     tx-checksum-ipv4: off [fixed]
                     tx-checksum-ip-generic: on
                     tx-checksum-ipv6: off [fixed]
                     tx-checksum-fcoe-crc: off [requested on]
                     tx-checksum-sctp: off [requested on]
                  scatter-gather: on
                     tx-scatter-gather: on
                     tx-scatter-gather-fraglist: off [requested on]
                  tcp-segmentation-offload: on
                     tx-tcp-segmentation: on
                     tx-tcp-ecn-segmentation: on
                     tx-tcp-mangleid-segmentation: on
                     tx-tcp6-segmentation: on
                  generic-segmentation-offload: on
                  generic-receive-offload: on
                  large-receive-offload: off [fixed]
                  rx-vlan-offload: off [fixed]
                  tx-vlan-offload: off [fixed]
                  ntuple-filters: off [fixed]
                  receive-hashing: off [fixed]
                  highdma: on
                  rx-vlan-filter: off [fixed]
                  vlan-challenged: off [fixed]
                  tx-gso-robust: off [fixed]
                  tx-fcoe-segmentation: off [requested on]
                  tx-gre-segmentation: off [requested on]
                  tx-gre-csum-segmentation: off [requested on]
                  tx-ipxip4-segmentation: off [requested on]
                  tx-ipxip6-segmentation: off [requested on]
                  tx-udp_tnl-segmentation: off [requested on]
                  tx-udp_tnl-csum-segmentation: off [requested on]
                  tx-gso-partial: off [fixed]
                  tx-tunnel-remcsum-segmentation: off [fixed]
                  tx-sctp-segmentation: on
                  tx-esp-segmentation: off [fixed]
                  tx-udp-segmentation: on
                  tx-gso-list: on
                  tx-nocache-copy: off
                  loopback: off [fixed]
                  rx-fcs: off [fixed]
                  rx-all: off [fixed]
                  tx-vlan-stag-hw-insert: off [fixed]
                  rx-vlan-stag-hw-parse: off [fixed]
                  rx-vlan-stag-filter: off [fixed]
                  l2-fwd-offload: off [fixed]
                  hw-tc-offload: off [fixed]
                  esp-hw-offload: off [fixed]
                  esp-tx-csum-hw-offload: off [fixed]
                  rx-udp_tunnel-port-offload: off [fixed]
                  tls-hw-tx-offload: off [fixed]
                  tls-hw-rx-offload: off [fixed]
                  rx-gro-hw: off [fixed]
                  tls-hw-record: off [fixed]
                  rx-gro-list: off
                  macsec-hw-offload: off [fixed]
                  rx-udp-gro-forwarding: off
                  hsr-tag-ins-offload: off [fixed]
                  hsr-tag-rm-offload: off [fixed]
                  hsr-fwd-offload: off [fixed]
                  hsr-dup-offload: off [fixed]
                  
                  ethtool -k enp1s0.835
                  Features for enp1s0.835:
                  rx-checksumming: off [fixed]
                  tx-checksumming: on
                  	tx-checksum-ipv4: off [fixed]
                  	tx-checksum-ip-generic: on
                  	tx-checksum-ipv6: off [fixed]
                  	tx-checksum-fcoe-crc: off [requested on]
                  	tx-checksum-sctp: off [requested on]
                  scatter-gather: on
                  	tx-scatter-gather: on
                  	tx-scatter-gather-fraglist: off [requested on]
                  tcp-segmentation-offload: on
                  	tx-tcp-segmentation: on
                  	tx-tcp-ecn-segmentation: on
                  	tx-tcp-mangleid-segmentation: on
                  	tx-tcp6-segmentation: on
                  generic-segmentation-offload: on
                  generic-receive-offload: on
                  large-receive-offload: off [fixed]
                  rx-vlan-offload: off [fixed]
                  tx-vlan-offload: off [fixed]
                  ntuple-filters: off [fixed]
                  receive-hashing: off [fixed]
                  highdma: on
                  rx-vlan-filter: off [fixed]
                  vlan-challenged: off [fixed]
                  tx-gso-robust: off [fixed]
                  tx-fcoe-segmentation: off [requested on]
                  tx-gre-segmentation: off [requested on]
                  tx-gre-csum-segmentation: off [requested on]
                  tx-ipxip4-segmentation: off [requested on]
                  tx-ipxip6-segmentation: off [requested on]
                  tx-udp_tnl-segmentation: off [requested on]
                  tx-udp_tnl-csum-segmentation: off [requested on]
                  tx-gso-partial: off [fixed]
                  tx-tunnel-remcsum-segmentation: off [fixed]
                  tx-sctp-segmentation: on
                  tx-esp-segmentation: off [fixed]
                  tx-udp-segmentation: on
                  tx-gso-list: on
                  tx-nocache-copy: off
                  loopback: off [fixed]
                  rx-fcs: off [fixed]
                  rx-all: off [fixed]
                  tx-vlan-stag-hw-insert: off [fixed]
                  rx-vlan-stag-hw-parse: off [fixed]
                  rx-vlan-stag-filter: off [fixed]
                  l2-fwd-offload: off [fixed]
                  hw-tc-offload: off [fixed]
                  esp-hw-offload: off [fixed]
                  esp-tx-csum-hw-offload: off [fixed]
                  rx-udp_tunnel-port-offload: off [fixed]
                  tls-hw-tx-offload: off [fixed]
                  tls-hw-rx-offload: off [fixed]
                  rx-gro-hw: off [fixed]
                  tls-hw-record: off [fixed]
                  rx-gro-list: off
                  macsec-hw-offload: off [fixed]
                  rx-udp-gro-forwarding: off
                  hsr-tag-ins-offload: off [fixed]
                  hsr-tag-rm-offload: off [fixed]
                  hsr-fwd-offload: off [fixed]
                  hsr-dup-offload: off [fixed]
                  
                  ethtool -k enp1s0
                  Features for enp1s0:
                  rx-checksumming: on
                  tx-checksumming: on
                  	tx-checksum-ipv4: on
                  	tx-checksum-ip-generic: off [fixed]
                  	tx-checksum-ipv6: on
                  	tx-checksum-fcoe-crc: off [fixed]
                  	tx-checksum-sctp: off [fixed]
                  scatter-gather: on
                  	tx-scatter-gather: on
                  	tx-scatter-gather-fraglist: off [fixed]
                  tcp-segmentation-offload: on
                  	tx-tcp-segmentation: on
                  	tx-tcp-ecn-segmentation: off [fixed]
                  	tx-tcp-mangleid-segmentation: off
                  	tx-tcp6-segmentation: on
                  generic-segmentation-offload: on
                  generic-receive-offload: on
                  large-receive-offload: off [fixed]
                  rx-vlan-offload: on
                  tx-vlan-offload: on
                  ntuple-filters: off [fixed]
                  receive-hashing: on
                  highdma: on [fixed]
                  rx-vlan-filter: on [fixed]
                  vlan-challenged: off [fixed]
                  tx-gso-robust: off [fixed]
                  tx-fcoe-segmentation: off [fixed]
                  tx-gre-segmentation: off [fixed]
                  tx-gre-csum-segmentation: off [fixed]
                  tx-ipxip4-segmentation: off [fixed]
                  tx-ipxip6-segmentation: off [fixed]
                  tx-udp_tnl-segmentation: off [fixed]
                  tx-udp_tnl-csum-segmentation: off [fixed]
                  tx-gso-partial: off [fixed]
                  tx-tunnel-remcsum-segmentation: off [fixed]
                  tx-sctp-segmentation: off [fixed]
                  tx-esp-segmentation: off [fixed]
                  tx-udp-segmentation: off [fixed]
                  tx-gso-list: off [fixed]
                  tx-nocache-copy: off
                  loopback: off
                  rx-fcs: off
                  rx-all: off
                  tx-vlan-stag-hw-insert: off
                  rx-vlan-stag-hw-parse: on
                  rx-vlan-stag-filter: on [fixed]
                  l2-fwd-offload: off [fixed]
                  hw-tc-offload: off [fixed]
                  esp-hw-offload: off [fixed]
                  esp-tx-csum-hw-offload: off [fixed]
                  rx-udp_tunnel-port-offload: off [fixed]
                  tls-hw-tx-offload: off [fixed]
                  tls-hw-rx-offload: off [fixed]
                  rx-gro-hw: off [fixed]
                  tls-hw-record: off [fixed]
                  rx-gro-list: off
                  macsec-hw-offload: off [fixed]
                  rx-udp-gro-forwarding: off
                  hsr-tag-ins-offload: off [fixed]
                  hsr-tag-rm-offload: off [fixed]
                  hsr-fwd-offload: off [fixed]
                  hsr-dup-offload: off [fixed]
                  
                  1 Reply Last reply Reply Quote 0
                  • stephenw10S Offline
                    stephenw10 Netgate Administrator
                    last edited by

                    Can you ping across it with large packets?

                    When ICMP passes and nothing else does it's usually either an MTU issue or some sort of asymmetric routing problem. But neither should have changed in 25.11.

                    The packages widget issue is known: https://forum.netgate.com/topic/199375/zero-packages-install/

                    N w0wW 2 Replies Last reply Reply Quote 0
                    • N Online
                      netblues @stephenw10
                      last edited by netblues

                      @stephenw10 Obviously yes

                      ping 8.8.4.4 -l 1472 -f

                      Pinging 8.8.4.4 with 1472 bytes of data:
                      Reply from 8.8.4.4: bytes=1472 time=14ms TTL=112
                      Reply from 8.8.4.4: bytes=1472 time=14ms TTL=112
                      Reply from 8.8.4.4: bytes=1472 time=14ms TTL=112
                      Reply from 8.8.4.4: bytes=1472 time=14ms TTL=112

                      Ping statistics for 8.8.4.4:
                      Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
                      Approximate round trip times in milli-seconds:
                      Minimum = 14ms, Maximum = 14ms, Average = 14ms

                      And same config couldn't cause mtu issues imho too.

                      And this is a plain vanila config, only one wan one lan interface, no policy routing, nothing fancy

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                      • stephenw10S Offline
                        stephenw10 Netgate Administrator
                        last edited by

                        Yup I agree it shouldn't. But PPPoE has always had MTU/MSS requirements and if_pppoe specifically had an MSS issue previously.

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                        • w0wW Offline
                          w0w @stephenw10
                          last edited by

                          @stephenw10 said in pfSense VM on Proxmox: PPPoE only works when parent NIC is PCI passthrough — virtual NIC breaks LAN→WAN traffic:

                          some sort of asymmetric routing problem.

                          I think these might be some of the commits on the FreeBSD side from the list I posted above. I don’t know whether Netgate uses the vanilla vtnet driver from FreeBSD 16 or their own custom patches. From what I can see, those checksum-related patches could potentially trigger this issue, but ifconfig vtnet0 -rxcsum -txcsum -tso -lro should disable this functionality, so I have no idea what is actually happening.

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                          • w0wW Offline
                            w0w @stephenw10
                            last edited by w0w

                            @stephenw10 said in pfSense VM on Proxmox: PPPoE only works when parent NIC is PCI passthrough — virtual NIC breaks LAN→WAN traffic:

                            and if_pppoe

                            BTW, mpd have the same issue. More precisely, the bug is not related to if_pppoe or mpd5, since it appears the same way with both.

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                            • w0wW Offline
                              w0w @netblues
                              last edited by

                              @netblues

                              Do you have the same settings?

                              2f15fa41-dcea-4151-8809-7f5bb87f2d90-image.png code_text

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