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Full Discussion: Telnet client IP determination
Top Forums Programming Telnet client IP determination Post 25991 by thomas.jones on Thursday 8th of August 2002 06:17:19 PM
Old 08-08-2002
Telnet client IP determination
I have configured my firewall to allow only five remote IP's to connect to my server. Upon connection...i would like to automate the Xsession functions for authorized IP's.

Mainly, $DISPLAY of the environment to the client.

I understand that the "gethostbyaddr" function is capable of this. But this means i would have to make another connection(as in...a separate client-to-server) other than the original telnet to perform this. Correct?

How do i do this without burdening the client with starting two scripts?
 

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LEARN ABOUT CENTOS

tcp-env

tcp-env(1)                                                    General Commands Manual                                                   tcp-env(1)

NAME

       tcp-env - set up TCP-related environment variables

SYNOPSIS

       tcp-env [ -rR ] [ -ttimeout ] program [ arg ...  ]

DESCRIPTION

       The  input  for  tcp-env  must be a TCP connection.  tcp-env finds out information about that connection, puts the information into several
       environment variables as described in tcp-environ(5), and runs program with the given arguments.

       Usually tcp-env is run from inetd.  It might instead be run from another server that already sets up the right  environment  variables;  if
       PROTO  is  set  to  TCP  when  tcp-env  is invoked, tcp-env assumes that all the other variables are set up properly, and it does not check
       whether the input is a TCP connection.

OPTIONS

       -r     (Default.)  Attempt to obtain TCPREMOTEINFO from the remote host.

       -R     Do not attempt to obtain TCPREMOTEINFO from the remote host.

       -ttimeout
              Give up on the TCPREMOTEINFO connection attempt after timeout seconds.  Default: 30.

SEE ALSO

       tcp-environ(5), inetd(8)

                                                                                                                                        tcp-env(1)
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