vb.net - Socket programming over internet -


i making simple chat system using socket programming technique in vb.net . works fine on local network how use on internet .. try port forwarding on router ... may way wrong . please tell me correct way port forwarding .. , tell me how connect client server ??? have use public ip of server system ???

the server side code :

    imports system.net.sockets     module module1          sub main()     console.writeline("")     dim clientlistener new tcplistener(12380)     clientlistener.stop()     clientlistener.start()     console.writeline("")     dim mysocket socket = clientlistener.acceptsocket()     console.writeline("")     dim recievebuff(225) byte     mysocket.receive(recievebuff, recievebuff.length, socketflags.none)     dim str string = system.text.encoding.ascii.getstring(recievebuff, 0, recievebuff.length).trim(microsoft.visualbasic.chrw(0))     while not str.startswith(".")         console.writeline(str)         mysocket.receive(recievebuff, recievebuff.length, socketflags.none)         str = system.text.encoding.ascii.getstring(recievebuff, 0, recievebuff.length).trim(microsoft.visualbasic.chrw(0))     end while     console.writeline("")     clientlistener.stop()     end sub      end module

and client side code : (those both console applications)

    imports system.net.sockets     imports system.io      module module1      sub main()      try         console.writeline("connecting localhost ")         dim serverlistener new tcpclient("192.168.1.103", 12380)         dim readstream stream = serverlistener.getstream         serverlistener.sendbuffersize = 256         console.writeline("input lines:")         dim str string = console.readline()         while 370             dim sendbuff byte() = system.text.encoding.ascii.getbytes(str)             readstream.write(sendbuff, 0, sendbuff.length)             if str.startswith(".")                 goto done             end if             str = console.readline()          end while        done:       console.writeline("done")         catch exp exception         console.writeline("exception: " + exp.tostring())        end try        end sub        end module

you need use public ip if client outside of lan.


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