Re: Telnet Server

["Simon Coulter" <shc@xxxxxxxxxxxxxxxxx>]

0
Hello John,

Yes, this can be done.  You will need to use different ports because only one 
process 
can open a socket on a port.  It took the terribly clever Telnet folks about 5 
releases 
to work out what the Services table was for.  "Oh, you mean it's used for more 
than 
showing a name in netstat, Duh!"

In VRM440 they added support to Telnet to actually use the telnet entry in the 
Service 
table to determine what port they were supposed to use.  Prior to this they had 
hardcoded port 23 -- well why not? that is the proper port -- I despair!  When 
they 
eventually fixed this they did at least PTF it back to VRM420 and VRM430.  The 
PTFs 
are:
        SF53486 (VRM420) 
        SF53489 (VRM430)

These PTFs make the Telnet server use the port number specified in the Services 
table.   
Read the cover letter for these PTFs for the activation instructions. 

Then you can modify the Telnet entry in the services table and assign a 
different port 
for Telnet.  Use the Work with Service Table Entries (WRKSRVTBLE) command.  You 
have to 
remove the old entry and add a new one (or you can use the commands RMVSRVTBLE 
and 
ADDSRVTBLE). 

Then you simply start the Telnet server with STRTCPSVR *TELNET. 

The only drawback is that you have to modify the Service table entry for Telnet 
before 
you start each new Telnet server. 

Regards,
Simon Coulter.

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//--- forwarded letter -------------------------------------------------------
> X-Mailer: Mozilla 4.72 [en] (Win98; U)
> Date: Tue, 27 Jun 2000 08:40:18 -0700
> From: "John Earl" <johnearl@400security.com>
> To: "MIDRANGE-L@midrange.com" <MIDRANGE-L@midrange.com>
> Reply-To: MIDRANGE-L@midrange.com
> Subject: Telnet Server

> 
> Is it possible to have two instances of the telnet server active
> at once??
> 
> Even if it required different ports???   One of our developers is
> testing Telnet Exit Programs and it would be nice if we could
> isolate his tests to a separate insance of the Telnet server so
> that he didn't disrupt his own and other programmers development
> environment.
> 
> Anyone have a clue as to how to try this?
> 
> jte
> 
> --
> John Earl                               johnearl@400security.com
> The PowerTech Group                     206-575-0711
> PowerLock Network Security              www.400security.com
> --

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