iptables -N town-a
iptables -N town-b
iptables -A FORWARD
iptables -A FORWARD -d 192.168.1.0/26 -j town-a
iptables -A FORWARD -s 192.168.1.0/26 -j town-a
iptables -A FORWARD -d 192.168.1.64/27 -j town-b
iptables -A FORWARD -s 192.168.1.64/27 -j town-b
iptables -A town-a -d 192.168.1.10
iptables -A town-a -s 192.168.1.10