SSH connection protocol does not work well between VPN clients

AR300M run the vpn client connect to vpn server(10.55.114.48)
you can config ssh login to 10.55.114.48, through the wan interface. as follow:

  1. ssh AR300M, add on route:
    ip route add 10.55.114.48 via 192.168.18.1 dev eth0.2

you can modify, the AR300M, wan interface"eth0.2", and the wan interface gateway is 192.168.18.1

  1. allow the forward, lan to wan, as:
    iptables -I FORWARD -i br-lan -o eth0.2 -j ACCEPT

or sample to test:
iptables -I FORWARD -j ACCEPT

now, ssh login through the wan interface.