问题
i am developing a facebook app and i am using for that facebooker plugin and webrick server. i have configured correctly my router to froward ports to my machine for 2 ports (80 and 3000) the apache server can be accessed from the net http://ip:80 amd the webrick server can http://ip:3000 , i dont understand why , please help me.
回答1:
What IP address do you have WEBrick set to listen on? My guess is it could be set to “127.0.0.1” which would cause the problem you’re describing. If so, set it to “0.0.0.0” and see if that works. If you’re starting the server with script/server, you can specify the IP to bind to with the -b flag:
script/server webrick -b 0.0.0.0 -p 3000
回答2:
You have to access it from another Network not in your network. Because your server is running on IP and your accessing machine is also connected to the same IP[because of port forwarding]. So it will not work in same network. You have to access it from different WAN IP Network.
来源：https://stackoverflow.com/questions/2497869/cant-do-port-forwarding-ro-my-webrick-server-to-access-it-from-the-net