if client and server are on different network then they can communicate with each other using socket programming?

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i want to know in socket programming client and Server can communicate with each other if both on different network place .. like a skype messenger ..
e.g i just want to send "hello string " from clients and recieve its on server then after response back to clients that "server recieved your message" ..

Posted 26-Nov-14 1:11am

Tariq Mehmood

Updated 26-Nov-14 5:41am

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Mehdi Gholam · Accepted Answer · 2014-11-26T01:19:00

Solution 1

To send a message to someone you need to be able to reach the destination address, if you are sending between different local networks and you don't have a bridge/router in between then you can't send.

To see if it is possible try :

c:\>ping <your destination="" ip=""></your>

If it does not work then you can't send.

Posted 26-Nov-14 1:19am

Mehdi Gholam

Comments

Mehdi Gholam 26-Nov-14 7:29am

We can talk because we are talking through a 3rd party messaging service, for TCP/UDP you need a direct connection.

Mehdi Gholam 26-Nov-14 7:57am

Skype has a central server where everyone connects to to advertise their availability.

Richard MacCutchan · Accepted Answer · 2014-11-26T06:14:00

Solution 2

This has nothing to do with your coding, and everything to do with your network configuration and firewall. If you cannot ping between client and server then there is no open route between those two points. If this is your network then you need to check the firewall settings and also the routing tables. If this is someone else's network then you need to ask them for assistance.

Posted 26-Nov-14 6:14am

Richard MacCutchan

Comments

[no name] 26-Nov-14 12:42pm

as you know, if skype server ping my ip ,then skype server will get response? ofcourse not
but skype server still communicating with Clients. how its going ????

Richard MacCutchan 26-Nov-14 12:46pm

Skype is a webbased system that routes through a webserver.

[no name] 27-Nov-14 13:40pm

skype is window bassed system but its use socket programming and windows services