I am running server on one machine and client on another machine, when I execute the code then it shows "connect retuned rc= -1". With the same code when I runc client and server on same machine then it does not give wny problem.

Please address this problem as soon as possible.

Now that you said that... No... I think I'll waste my time else where thank you very much. All help here is volunteed, so don't tell us to address this problem as soon as possible, because it's not a problem that effects us.

P.S. you haven't actually said what your using, what scripts or whatever your using. You have given us no real information what so ever so what you think we can do to fix this for you, I have no frigging idea. In future be more careful with what you say and think about what we actually need to know to help you out.

I am actually using Ubuntu to run the Linux client-server program.
I tried giving 192.168.1.144 as an IP telnet address to the client but it is still not getting connected.

Do you want me to put the code client server code here?

how to use perror instead of errno?

It's a while ago that I did socket programming but if you check things like errno and use perror, you might be able to fine something.

As it's the client that does not connect, try telnet ipaddress portno or telnet hostname portno to connect to the server and see what works.

Check name resolution and firewalls.

I tried giving 192.168.1.144 as an IP telnet address to the client but it is still not getting connected.

Do you want me to put the code client server code here?

OK, by specifying the ip-adderss we can rule out dns issues.

No need to post your code, it will be more or less OK as it works on a local machine.

Assuming your server is listening on port 5678, you should use telnet 192.168.1.144 5678. I guess that this (exact) command works on the server itself and does not work when used on a remote machine. Please post the error message that telnet gives.

I don't think that this is a code issue; check your firewall settings.

And you should modify your client code so it will give more detailed information (as said earlier by using errno, perror and similar functions) just like telnet does.