Bridge Not Forwarding ARP
Dan Lists
lists.dan at gmail.com
Mon Jul 8 17:19:58 UTC 2019
On Mon, Jul 8, 2019 at 11:55 AM Michael Sierchio <kudzu at tenebras.com> wrote:
> What's your firewall ruleset look like? (show, don't tell)
>
The firewall is off for testing (the machine is only on a private network).
# ipfw list
65535 allow ip from any to any
> What does sysctl report on the interfaces and on arp?
>
>
I have not changed any settings.
net.link.ether.inet.log_arp_permanent_modify: 1
net.link.ether.inet.log_arp_movements: 1
net.link.ether.inet.log_arp_wrong_iface: 1
net.link.ether.inet.garp_rexmit_count: 0
net.link.bridge.allow_llz_overlap: 0
net.link.bridge.inherit_mac: 0
net.link.bridge.log_stp: 0
net.link.bridge.pfil_local_phys: 0
net.link.bridge.pfil_member: 1
net.link.bridge.pfil_bridge: 1
net.link.bridge.ipfw_arp: 0
net.link.bridge.pfil_onlyip: 1
hw.em.eee_setting: 1
hw.em.rx_process_limit: 100
hw.em.enable_msix: 1
hw.em.sbp: 0
hw.em.smart_pwr_down: 0
hw.em.txd: 1024
hw.em.rxd: 1024
hw.em.rx_abs_int_delay: 66
hw.em.tx_abs_int_delay: 66
hw.em.rx_int_delay: 0
hw.em.tx_int_delay: 66
hw.em.disable_crc_stripping: 0
dev.em.2.wake: 0
dev.em.2.mac_stats.tso_ctx_fail: 0
dev.em.2.mac_stats.tso_txd: 0
dev.em.2.mac_stats.tx_frames_1024_1522: 3
dev.em.2.mac_stats.tx_frames_512_1023: 2
dev.em.2.mac_stats.tx_frames_256_511: 5675
dev.em.2.mac_stats.tx_frames_128_255: 4255
dev.em.2.mac_stats.tx_frames_65_127: 35563
dev.em.2.mac_stats.tx_frames_64: 918055
dev.em.2.mac_stats.mcast_pkts_txd: 0
dev.em.2.mac_stats.bcast_pkts_txd: 0
dev.em.2.mac_stats.good_pkts_txd: 963553
dev.em.2.mac_stats.total_pkts_txd: 963553
dev.em.2.mac_stats.good_octets_txd: 60423175
dev.em.2.mac_stats.good_octets_recvd: 16906
dev.em.2.mac_stats.rx_frames_1024_1522: 1
dev.em.2.mac_stats.rx_frames_512_1023: 0
dev.em.2.mac_stats.rx_frames_256_511: 0
dev.em.2.mac_stats.rx_frames_128_255: 0
dev.em.2.mac_stats.rx_frames_65_127: 235
dev.em.2.mac_stats.rx_frames_64: 0
dev.em.2.mac_stats.mcast_pkts_recvd: 0
dev.em.2.mac_stats.bcast_pkts_recvd: 0
dev.em.2.mac_stats.good_pkts_recvd: 236
dev.em.2.mac_stats.total_pkts_recvd: 236
dev.em.2.mac_stats.xoff_txd: 0
dev.em.2.mac_stats.xoff_recvd: 0
dev.em.2.mac_stats.xon_txd: 0
dev.em.2.mac_stats.xon_recvd: 0
dev.em.2.mac_stats.coll_ext_errs: 0
dev.em.2.mac_stats.alignment_errs: 0
dev.em.2.mac_stats.crc_errs: 0
dev.em.2.mac_stats.recv_errs: 0
dev.em.2.mac_stats.recv_jabber: 0
dev.em.2.mac_stats.recv_oversize: 0
dev.em.2.mac_stats.recv_fragmented: 0
dev.em.2.mac_stats.recv_undersize: 0
dev.em.2.mac_stats.recv_no_buff: 0
dev.em.2.mac_stats.missed_packets: 0
dev.em.2.mac_stats.defer_count: 0
dev.em.2.mac_stats.sequence_errors: 0
dev.em.2.mac_stats.symbol_errors: 0
dev.em.2.mac_stats.collision_count: 0
dev.em.2.mac_stats.late_coll: 0
dev.em.2.mac_stats.multiple_coll: 0
dev.em.2.mac_stats.single_coll: 0
dev.em.2.mac_stats.excess_coll: 0
dev.em.2.rxd_tail: 235
dev.em.2.rxd_head: 236
dev.em.2.txd_tail: 127
dev.em.2.txd_head: 127
dev.em.2.fifo_reset: 0
dev.em.2.fifo_workaround: 0
dev.em.2.fc_low_water: 45604
dev.em.2.fc_high_water: 47104
dev.em.2.rx_control: 32794
dev.em.2.device_control: 1086325321
dev.em.2.watchdog_timeouts: 0
dev.em.2.rx_overruns: 0
dev.em.2.tx_desc_fail2: 0
dev.em.2.tx_desc_fail1: 0
dev.em.2.tx_dma_fail: 0
dev.em.2.dropped: 0
dev.em.2.mbuf_defrag_fail: 0
dev.em.2.cluster_alloc_fail: 0
dev.em.2.flow_control: 3
dev.em.2.rx_processing_limit: 100
dev.em.2.itr: 488
dev.em.2.tx_abs_int_delay: 66
dev.em.2.rx_abs_int_delay: 66
dev.em.2.tx_int_delay: 66
dev.em.2.rx_int_delay: 0
dev.em.2.nvm: -1
dev.em.2.%parent: pci2
dev.em.2.%pnpinfo: vendor=0x8086 device=0x100f subvendor=0x15ad
subdevice=0x0750 class=0x020000
dev.em.2.%location: slot=3 function=0 dbsf=pci0:2:3:0
handle=\_SB_.PCI0.P2P0.S4F0
dev.em.2.%driver: em
dev.em.2.%desc: Intel(R) PRO/1000 Legacy Network Connection 1.1.0
dev.em.1.wake: 0
dev.em.1.mac_stats.tso_ctx_fail: 0
dev.em.1.mac_stats.tso_txd: 0
dev.em.1.mac_stats.tx_frames_1024_1522: 1
dev.em.1.mac_stats.tx_frames_512_1023: 0
dev.em.1.mac_stats.tx_frames_256_511: 0
dev.em.1.mac_stats.tx_frames_128_255: 0
dev.em.1.mac_stats.tx_frames_65_127: 13
dev.em.1.mac_stats.tx_frames_64: 222
dev.em.1.mac_stats.mcast_pkts_txd: 0
dev.em.1.mac_stats.bcast_pkts_txd: 0
dev.em.1.mac_stats.good_pkts_txd: 236
dev.em.1.mac_stats.total_pkts_txd: 236
dev.em.1.mac_stats.good_octets_txd: 15962
dev.em.1.mac_stats.good_octets_recvd: 5286574431
dev.em.1.mac_stats.rx_frames_1024_1522: 2876152
dev.em.1.mac_stats.rx_frames_512_1023: 269810
dev.em.1.mac_stats.rx_frames_256_511: 605978
dev.em.1.mac_stats.rx_frames_128_255: 1879331
dev.em.1.mac_stats.rx_frames_65_127: 3179015
dev.em.1.mac_stats.rx_frames_64: 6
dev.em.1.mac_stats.mcast_pkts_recvd: 0
dev.em.1.mac_stats.bcast_pkts_recvd: 0
dev.em.1.mac_stats.good_pkts_recvd: 8809664
dev.em.1.mac_stats.total_pkts_recvd: 8816562
dev.em.1.mac_stats.xoff_txd: 0
dev.em.1.mac_stats.xoff_recvd: 0
dev.em.1.mac_stats.xon_txd: 0
dev.em.1.mac_stats.xon_recvd: 0
dev.em.1.mac_stats.coll_ext_errs: 0
dev.em.1.mac_stats.alignment_errs: 0
dev.em.1.mac_stats.crc_errs: 0
dev.em.1.mac_stats.recv_errs: 0
dev.em.1.mac_stats.recv_jabber: 0
dev.em.1.mac_stats.recv_oversize: 0
dev.em.1.mac_stats.recv_fragmented: 0
dev.em.1.mac_stats.recv_undersize: 0
dev.em.1.mac_stats.recv_no_buff: 0
dev.em.1.mac_stats.missed_packets: 0
dev.em.1.mac_stats.defer_count: 0
dev.em.1.mac_stats.sequence_errors: 0
dev.em.1.mac_stats.symbol_errors: 0
dev.em.1.mac_stats.collision_count: 0
dev.em.1.mac_stats.late_coll: 0
dev.em.1.mac_stats.multiple_coll: 0
dev.em.1.mac_stats.single_coll: 0
dev.em.1.mac_stats.excess_coll: 0
dev.em.1.rxd_tail: 167
dev.em.1.rxd_head: 168
dev.em.1.txd_tail: 236
dev.em.1.txd_head: 236
dev.em.1.fifo_reset: 0
dev.em.1.fifo_workaround: 0
dev.em.1.fc_low_water: 45604
dev.em.1.fc_high_water: 47104
dev.em.1.rx_control: 32794
dev.em.1.device_control: 1086325321
dev.em.1.watchdog_timeouts: 0
dev.em.1.rx_overruns: 0
dev.em.1.tx_desc_fail2: 0
dev.em.1.tx_desc_fail1: 0
dev.em.1.tx_dma_fail: 0
dev.em.1.dropped: 0
dev.em.1.mbuf_defrag_fail: 0
dev.em.1.cluster_alloc_fail: 0
dev.em.1.flow_control: 3
dev.em.1.rx_processing_limit: 100
dev.em.1.itr: 488
dev.em.1.tx_abs_int_delay: 66
dev.em.1.rx_abs_int_delay: 66
dev.em.1.tx_int_delay: 66
dev.em.1.rx_int_delay: 0
dev.em.1.nvm: -1
dev.em.1.%parent: pci2
dev.em.1.%pnpinfo: vendor=0x8086 device=0x100f subvendor=0x15ad
subdevice=0x0750 class=0x020000
dev.em.1.%location: slot=2 function=0 dbsf=pci0:2:2:0
handle=\_SB_.PCI0.P2P0.S3F0
dev.em.1.%driver: em
dev.em.1.%desc: Intel(R) PRO/1000 Legacy Network Connection 1.1.0
>
> On Mon, Jul 8, 2019 at 9:15 AM Dan Lists <lists.dan at gmail.com> wrote:
>
> > I have a server running FreeBSD 11.2 that I am wanting to use as a
> bridged
> > firewall. I have it set up and it mostly works. The problem is that
> ARP
> > replies are not being forwarded from the outside interface to the inside
> > interface. It appears to be working in the other direction. I see the
> > ARP request go out on the outside interface and the reply arrives back at
> > the outside interface. The ARP reply is never getting to the bridge or
> to
> > the inside interface.
> >
> > The firewall server and the device behind it are in ESX. I think I've
> > worked all the ESX issues out. When I manually add an ARP entry
> everything
> > works. I've done this before with a physical server running FreeBSD 8.4
> > and it works as expected. The differences are physical vs virtual, and
> > 8.4 vs 11.2.
> >
> > I'm at a loss as to why it is not working. I've searched the web and
> > found noting. If anyone could offer suggestions on how to fix this or
> > begin to debug it I would greatly appreciate it.
> >
> > Thanks,
> >
> > Dan
> > _______________________________________________
> > freebsd-net at freebsd.org mailing list
> > https://lists.freebsd.org/mailman/listinfo/freebsd-net
> > To unsubscribe, send any mail to "freebsd-net-unsubscribe at freebsd.org"
> >
>
>
> --
>
> "Well," Brahmā said, "even after ten thousand explanations, a fool is no
> wiser, but an intelligent person requires only two thousand five hundred."
>
> - The Mahābhārata
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