UNIX for Dummies Questions & Answers

Hi,

I need to log telnet sessions. Therefor i want to use telnets logging function.
UNIX man pages - telnet: unixhelp.ed.ac.uk/CGI/man-cgi?telnet
Like:

Code:

telnet -n /path/to/logfile IP PORT

But it doesn't work. The file is created, but it is an emty file after the session.

I've also googled around, but only found the manpages,
but there is no more information.

anyone has a idea?

That is for a tracefile, not logging sessions.
You need to create an interposer process, an alias maybe
This only works for outbound telnet -- not when someone connects to your system.
create a script called /usr/local/bin/telnet that does something like this:

Code:

#!/bin/ksh
umask 000     
[ ! -d tmp/log  ] && mkdir /tmp/log  2>&1> /dev/null
script -a /tmp/telnet.log.$$
/usr/bin/telnet  $*
exit 0

next in /etc/profile

Code:

alias telnet=/usr/bin/local/telnet

Users have to login again to activate this. When a user types "telnet somenode"
the system will telnet to there and record the entire session in a file in /tmp/log

Is this what you mean -- keylogging?

Thats just what i want. Loging an outgoing telnet session.

So ill try it.

but whats than a tracefile. nothing to do with logging?

---------- Post updated 5th Nov 2010 at 02:07 PM ---------- Previous update was 4th Nov 2010 at 02:46 PM ----------

I've tried it without success

Code:

user@base:~/workspace$ telnet 10.16.1.23 54432
/usr/bin/local/telnet: line 2: syntax error at line 3: `>' unexpected

as i think line 3 only checks if the directory exists
i commented it out and tried again

Code:

user@base:~/workspace$ telnet 10.16.1.23 54432
Script started, file is /tmp/telnet.log.11133
user@base:~/workspace$

So there is no interactive telnet session now.
But the logfile /tmp/telnet.log.11133 is created and emty