From: Chris Johnston (chris@routerguy.com)
Date: Thu Sep 05 2002 - 04:45:18 GMT-3
Hi Michael;
Yes. RTEL is used to allow you to telnet to a port and have your traffic
pop out on a serial port. Well, this is as simple as I can explain it.
RTEL is used on terminal servers and print servers. In fact, you can
configure your AUX port on your router as a LPR port so you can print to a
dot-matrix printer or even a teletype.
To make things more interesting, you can also connect a modem to that AUX
port. You can get software (Cisco used to give it away for free) and you
can bind your local COM6 (whatever) to that port. So you could use a modem
for RAS connections that is physically somewhere across the Internet.
So to create your session, you telnet on 2001 (for 2500 series routers) or
2129 (for 3600 series routers) and so on. 1750's are at something like
TCP/2005
There is also raw and one more I cannot remember. You can look at Cisco.com
for RTEL configuration to see what the port ranges do for you.
See this URL for all of the definitions:
http://www.cisco.com/warp/public/112/chapter16.htm
Chris
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Michael Spencer
Sent: Thursday, September 05, 2002 12:19 AM
To: ccielab@groupstudy.com
Subject: reverse telnet
Can someone explain to me as what is the difference
b/w Reverse Telnet and Forward Telnet. And also why in
reverse telnet we use the port no. 2000+n as compared
to normal telnet port of 23.
TIA
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