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Thank you radoulov for your help on netcat command (nc -lp)

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Operating Systems Linux Thank you radoulov for your help on netcat command (nc -lp)
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Old 07-02-2011
Thank you radoulov for your help on netcat command (nc -lp)
Hello,

Thank you very much for the line nc -lp <port> . I tried to run simple chat session with nc as it's shown in catonmatDOTorg but failed miserably with that syntax inspite of opening port 7777 by iptables . But your command example is working nicely.
So a bagful of thanks Smilie)

Only one hitch. After opening a port [7777 using iptables such as iptables -A INPUT -m state --state NEW -m tcp \
-p tcp --dport 7777 --j ACCEPT ] nmap still showing the port
7777 is closed. [nmap -p 7777 localhost]

---------- Post updated at 06:00 AM ---------- Previous update was at 04:30 AM ----------

Oh! I have made a conceptual mistake. I have unblocked a port but haven't opened it as unblocking a port doesn't mean opening the port, I have just enable the port to reach for so a service can use it, When a service is running in that port,, then the port is said to be a open port[ listening for a connection]
Last edited by vectrum; 07-02-2011 at 08:09 AM..
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LEARN ABOUT DEBIAN

dnetcat

dnetcat(1)							   User Commands							dnetcat(1)

NAME

       dnetcat - opens a DECnet connection

SYNOPSIS

       dnetcat {-h|--help}

       dnetcat [-v] [-z] node[::|[::] ]object

       dnetcat [-v] [-f] -l object

DESCRIPTION

       dnetcat is a netcat(1) like tool that opens a DECnet connection and copies all data between the standard input/output to/from the socket.

OPTIONS

   -v
       Be verbose. Prints useful (debug) messages.

   -z
       Zero IO mode. In this mode a connection is dropped directly after it is opened.	This can be used to scan if the remote side listens on the
       given address and object.

   -l
       Listen mode. In this mode dnetcat accepts connections on the given object.

   -f
       Fork on new connection. This let netcat accept multiple connections in listen mode.  This is ignored if -l is not given.

   --help, -h
       Prints a small help.

EXAMPLES

       This program can be used as 'ProxyCommand' for ssh(1).  You may use it via command line like this:
	ssh -o 'ProxyCommand dnetcat %h ssh' [...] mynode

       or you may use it in your ~/.ssh/config like this:
	Host *::
	ProxyCommand dnetcat %h ssh

       This will enable you to connect to any DECnet node by adding "::" at the end of the node name like this:
	ssh mynode::

       For more information on ssh(1) see it's manpage.

SEE ALSO

       ssh(1), netcat(1).

AUTHORS

       This program is written by Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>.

dntools 							  September 2008							dnetcat(1)