WAN static IP
re0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=8209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,LINKSTATE>
	capabilities=18399b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_UCAST,WOL_MCAST,WOL_MAGIC,LINKSTATE,NETMAP>
	ether **:**:**:**:**:46
	hwaddr **:**:**:**:**:46
	inet6 ****:****:****:b946%re0 prefixlen 64 scopeid 0x1
	inet ***.***.***.170 netmask 0xfffffff8 broadcast ***.***.***.175
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	media: Ethernet autoselect (1000baseT <full-duplex,master>)
	status: active
	supported media:
		media autoselect mediaopt flowcontrol
		media autoselect
		media 1000baseT mediaopt full-duplex,flowcontrol,master
		media 1000baseT mediaopt full-duplex,flowcontrol
		media 1000baseT mediaopt full-duplex,master
		media 1000baseT mediaopt full-duplex
		media 1000baseT mediaopt master
		media 1000baseT
		media 100baseTX mediaopt full-duplex,flowcontrol
		media 100baseTX mediaopt full-duplex
		media 100baseTX
		media 10baseT/UTP mediaopt full-duplex,flowcontrol
		media 10baseT/UTP mediaopt full-duplex
		media 10baseT/UTP
		media none
	
WAN PPPOE
re1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=8209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,LINKSTATE>
	capabilities=18399b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_UCAST,WOL_MCAST,WOL_MAGIC,LINKSTATE,NETMAP>
	ether **:**:**:**:**:ac
	hwaddr **:**:**:**:**:ac
	inet6 fe80::****:****:****:4aac%re1 prefixlen 64 scopeid 0x2
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	media: Ethernet autoselect (none)
	status: no carrier
	supported media:
		media autoselect mediaopt flowcontrol
		media autoselect
		media 1000baseT mediaopt full-duplex,flowcontrol,master
		media 1000baseT mediaopt full-duplex,flowcontrol
		media 1000baseT mediaopt full-duplex,master
		media 1000baseT mediaopt full-duplex
		media 1000baseT mediaopt master
		media 1000baseT
		media 100baseTX mediaopt full-duplex,flowcontrol
		media 100baseTX mediaopt full-duplex
		media 100baseTX
		media 10baseT/UTP mediaopt full-duplex,flowcontrol
		media 10baseT/UTP mediaopt full-duplex
		media 10baseT/UTP
		media none
LAN
rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=2008<VLAN_MTU,WOL_MAGIC>
	capabilities=3808<VLAN_MTU,WOL_UCAST,WOL_MCAST,WOL_MAGIC>
	ether 00:0e:2e:d4:a7:eb
	hwaddr 00:0e:2e:d4:a7:eb
	inet6 fe80::20e:2eff:fed4:a7eb%rl0 prefixlen 64 scopeid 0x3
	inet 192.168.0.8 netmask 0xffffff00 broadcast 192.168.0.255
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	media: Ethernet autoselect (100baseTX <full-duplex>)
	status: active
	supported media:
		media autoselect
		media 100baseTX mediaopt full-duplex
		media 100baseTX
		media 10baseT/UTP mediaopt full-duplex
		media 10baseT/UTP

enc0: flags=0<> metric 0 mtu 1536
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	groups: enc

lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
	options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
	capabilities=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
	inet6 ::1 prefixlen 128
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x5
	inet 127.0.0.1 netmask 0xff000000
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	groups: lo

pflog0: flags=100<PROMISC> metric 0 mtu 33160
	groups: pflog

pfsync0: flags=0<> metric 0 mtu 1500
	groups: pfsync
	syncpeer: 224.0.0.240 maxupd: 128 defer: on
	syncok: 1

pppoe0: flags=88d1<UP,POINTOPOINT,RUNNING,NOARP,SIMPLEX,MULTICAST> metric 0 mtu 1500
	inet6 fe80::ca60:ff:fe58:b946%pppoe0 prefixlen 64 scopeid 0x8
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	
gre0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1476
	options=80000<LINKSTATE>
	capabilities=80000<LINKSTATE>
	tunnel inet ***.***.***.170 --> ***.***.***.108
	inet 192.168.255.2 --> 192.168.255.1 netmask 0xffffff00
	inet6 fe80::***:****:****:****%gre0 prefixlen 64 scopeid 0x9
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	
gre1: flags=8011<UP,POINTOPOINT,MULTICAST> metric 0 mtu 1476
	options=80000<LINKSTATE>
	capabilities=80000<LINKSTATE>
	inet 192.168.255.2 --> 192.168.255.1 netmask 0xffffff00
	inet6 fe80::***:****:****:****%gre1 prefixlen 64 tentative scopeid 0xa
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>

На втором шлюзе на котором все работает:

lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
	options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
	capabilities=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
	inet6 ::1 prefixlen 128
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
	inet 127.0.0.1 netmask 0xff000000
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	groups: lo
enc0: flags=41<UP,RUNNING> metric 0 mtu 1536
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	groups: enc
pflog0: flags=100<PROMISC> metric 0 mtu 33160
	groups: pflog
pfsync0: flags=0<> metric 0 mtu 1500
	groups: pfsync
	syncpeer: 224.0.0.240 maxupd: 128 defer: on
	syncok: 1
LAN
hn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=40001b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,TXCSUM_IPV6>
	capabilities=40071b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,TSO4,TSO6,LRO,TXCSUM_IPV6>
	ether MAC
	hwaddr MAC
	inet6 fe80::215:5dff:fe6d:a605%hn0 prefixlen 64 scopeid 0x5
	inet 192.168.0.8 netmask 0xffffff00 broadcast 192.168.0.255
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	media: Ethernet autoselect (10Gbase-T <full-duplex>)
	status: active
	supported media:
		media autoselect
WAN
hn1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=40001b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,TXCSUM_IPV6>
	capabilities=40071b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,TSO4,TSO6,LRO,TXCSUM_IPV6>
	ether MAC
	hwaddr MAC
	inet6 fe80::215:5dff:fe6d:a606%hn1 prefixlen 64 scopeid 0x6
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	media: Ethernet autoselect (10Gbase-T <full-duplex>)
	status: active
	supported media:
		media autoselect
pppoe0: flags=88d1<UP,POINTOPOINT,RUNNING,NOARP,SIMPLEX,MULTICAST> metric 0 mtu 1492
	inet ***.***.***.171 --> ***.***.141.13  netmask 0xffffffff
	inet6 fe80::****:****:****:a605%pppoe0 prefixlen 64 scopeid 0x7
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
gre0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> metric 0 mtu 1476
	options=80000<LINKSTATE>
	capabilities=80000<LINKSTATE>
	tunnel inet ***.***.***.171 --> ***.***.***.108
	inet 192.168.255.2 --> 192.168.255.1  netmask 0xffffff00
	inet6 fe80::215:5dff:fe6d:a605%gre0 prefixlen 64 scopeid 0x8
	nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
	groups: gre

На работающем Gateway поднят и IP присвоен, monitor IP выбрал 1.1.1.1