I install openl2tp(http://www.openl2tp.org/) in my server, lan ip of the
server is 192.168.1.100 and wan ip of the server is 18.104.22.168. i can connect l2tp
server in local area network， but i can not connect the l2tp server with wan ip, who could tell
me the reason ? thanks!
1 I can not connect to WAN from both inside or the outside of the network;
2 the routing is ok and the 1701 port is open
3 there are not enough error logs except some retry messages :(