05-10-2019
No.
Clients do not "listen" on port 80 or 443, servers listen on them.
In general, client processes are not "listeners".
I would love to take all my time teaching you client server operations; but it is really better for you to learn about this yourself.
You cannot learn about this in 10 minutes. You need to read some books or watch 3 or 4 YT videos, or both.
I spend my time developing code. However, there may be others here at unix.com who have time to teach you client-server communications.
Sorry, I just do not have the time right now. However, I can answer one question a day if you want to ask me (maybe two at the most); but you could probably learn faster watching some YT videos.
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LEARN ABOUT DEBIAN
efax-gtk-socket-client
efax-gtk-socket-client(1) General Commands Manual efax-gtk-socket-client(1)
NAME
efax-gtk-socket-client - a client of efax-gtk to work with lpd/lprng
SYNOPSIS
efax-gtk-socket-client [hostname] [port]
DESCRIPTION
This program enables lpd/lprng to access the efax-gtk socket server. Meaning the user can send faxes to a printer, which will ack as a fax.
It takes two arguments - first a hostname to connect to, and secondly a port number at that hostname to connect to. All efax-gtk-socket-
client does is to read from standard input (in this case from lpd/lprng) and passes it to a socket at the hostname and port number passed
as arguments to it (namely the hostname of the computer efax-gtk is running on - normally you would specify localhost - and the port number
of the socket).
fax:
:sd=/var/spool/fax:
:mx#0:
:sh:
:lp=/dev/null:
:if=/var/spool/fax/efax-gtk-faxfilter:
This will cause a printer by the name of "fax" to be available, which (if printed to) will send the file to the efax-gtk socket server. If
you set efax-gtk to listen on a port other than port 9900, you will need to amend the file /var/spool/fax/efax-gtk-faxfilter by hand to
specify the correct port number on which efax-gtk is listening.
Don't forget to restart the lpd printer daemon after amending /etc/printcap.
OPTIONS
[ hostname ] - The name of the host to listen to. Usually should be locahlhost.
[ port ] - the port number to listen to on the [ hostname ].
SEE ALSO
efax(1), efax-gtk(1).
AUTHOR
efax-gtk-socket-client was written by Chris Vine <chris@cvine.freeserve.co.uk>.
This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others).
July 18, 2006 efax-gtk-socket-client(1)