auto fff-sw
iface fff-sw inet static
	address 10.50.252.161
	pre-up iptunnel add $IFACE mode gre remote 46.4.85.158 local 5.189.177.88 ttl 255
	up ifconfig $IFACE multicast
	pointopoint 10.50.252.8
	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-up ip -6 addr flush dev $IFACE
#	post-up ip -6 addr add fe80::babe:1:4/64 dev $IFACE
	post-up ip -6 addr add fe80::1983:1:4/64 dev $IFACE
#	post-up ip -6 addr add fe80::1985/64 dev $IFACE
	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