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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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    • w0wW Away
      w0w @netblues
      last edited by w0w

      @netblues

      ok… thats interesting…

      ifconfig vtnet0 -rxcsum -txcsum -rxcsum6 -txcsum6 -vlanhwtag -vlanhwcsum

      Try this on LAN interface. Hope this works for you...

      I just compared ifconfig output for both working and non working VMs and looks like working VM on every interface have options=880008<VLAN_MTU,LINKSTATE,HWSTATS>
      So I applied it to the pppoe parent - still no go... and then I've tried LAN interface and it worked for me.

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

        @w0w said in pfSense VM on Proxmox: PPPoE only works when parent NIC is PCI passthrough — virtual NIC breaks LAN→WAN traffic:

        ifconfig vtnet0 -rxcsum -txcsum -rxcsum6 -txcsum6 -vlanhwtag -vlanhwcsum

        Tried that.. Still , no dice. :(

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

          @netblues
          Please show your ifconfig output for LAN and pppoe parent interface.

          N 1 Reply Last reply Reply Quote 0
          • 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 Away
              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 Away
                  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.

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                  • w0wW Away
                    w0w
                    last edited by

                    Configured LAN to use ix0 directly — nothing changed.

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                    • w0wW Away
                      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 Online
                          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 1 Reply 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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