Listen on port – client server demo


You want to listen on a port, maybe to test firewalls! ๐Ÿ™‚

Excellent introduction to client server software.


Another use bit of socket programming, courtesy of Perl! ๐Ÿ™‚

Extremely useful bit of Perl, which can be used with the other post on this site, to confirm network connectivity (port scanner).

This code (see example tab) will listen on a port (although be careful it is over 1024, unless you are running as root/admin).


perl -MIO::Socket -e '$srv=IO::Socket::INET->

or die "Failed trying to listen on $ARGV[0]n";while($cl=$srv->accept()) { while() { print }

} close($socket);' port

Can also use it as a cheap chat service! ๐Ÿ™‚ Everything gets echo'd through – so just telnet host port and type away! ๐Ÿ™‚

Also see my port scan code at the reference tab.


[tags]Perl Socket Programming, Network Programming, Perl Port Listen, Perl Client Server demo, Perl Coding School[/tags]

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