#GRE-Tunnel zu fff-gw-wue2
#
#???? Michael Mifritscher (mifritscher)
#???? fff@mifritscher.de
#
#fff-gw-wue2
#       öffentlich:     
#       freifunk:       10.50.252.166
#fff-ab-01
#       öffentlich:     5.189.177.88
#       freifunk:       10.50.252.167

auto fff-gw-wue2
iface fff-gw-wue2 inet static
address 10.50.252.167
	pre-up iptunnel add $IFACE mode gre local 5.189.177.88 remote <remote-IP> ttl 225
	up ifconfig $IFACE multicast
	pointopoint 10.50.252.166
	post-up iptables -t mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -o $IFACE -j TCPMSS --clamp-mss-to-pmtu
	post-up ip rule add iif $IFACE table fff
	post-up ip rule add from 10.50.0.0/16 table fff
	post-up ip rule add to 10.50.0.0/16 table fff
	post-down ip rule del iif $IFACE table fff
	post-down ip rule del from 10.50.0.0/16 table fff
	post-down ip rule del to 10.50.0.0/16 table fff
	post-down iptables -t mangle -D POSTROUTING -p tcp --tcp-flags SYN,RST SYN -o $IFACE -j TCPMSS --clamp-mss-to-pmtu
	post-down iptunnel del $IFACE