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Full Discussion: Create a TCP/IP Connection
Top Forums Shell Programming and Scripting Create a TCP/IP Connection Post 302196666 by era on Monday 19th of May 2008 06:47:04 AM
Old 05-19-2008
Hmm, looks like you just get "Invalid argument" in $! if you use a host name which doesn't exist, so that doesn't help much. Still, a good habit to always include $! in suicide notes.

Connection refused means you forgot to start the listener on port 4343. You can't connect if nobody has opened the port for listening. Just run nc -l -p 4343 on there for now. Once you have the client working, you can work on replacing the server with something more to your liking.
 

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LEARN ABOUT DEBIAN

dhid

DHID(8) 						    BSD System Manager's Manual 						   DHID(8)

NAME

     dhid -- Dynamic Host Information System client.

SYNOPSIS

     dhid [-h] [-p port] [-P pidfile] [-f conffile]

DESCRIPTION

     dhid is the DHIS client daemon. After setting up with a DHIS provider, each machine may run a dhid daemon (in background) in order to update
     its dynamic IP address within the server.

     /etc/dhid.conf should be configured according to the provider's assigned parameters.

     Once running, dhid sends echo request packets to the server and expects a reply. Once received, dhid tries to authenticate at the server
     either in secure on insecure mode. From then on, and providing authentication was successful, the client waits and replies to queries origi-
     nated at the server. If the server doesn't receive acknowledgments of these packets the host is marked offline.  Likewise, if the client
     doesn't receive queries for a period of time the offline stage is restored.

     Therefore, the only thing a DHIS host needs is to run the dhid client.  The server is able to determine when the host is online and the
     server tables are updated automatically.

OPTIONS

     -h      Show usage information.

     -p port
	     Specify port to listen on. If not specified, the default is port 58800.

     -P pidfile
	     Use an alternative PID file instead of /var/run/dhisd.pid.

     -l conffile
	     Use an alternative configuration file instead of /etc/dhid.conf.

FILES

     /etc/dhid.conf
	     DHIS client configuration.

AUTHOR

     dhid has been written by Joao Cabral <jcnc@dhis.org>.

     This manual page was written by Guus Sliepen <guus@debian.org> for the Debian GNU/Linux system.

Debian GNU/Linux						   June 1, 2019 						  Debian GNU/Linux
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