Question regarding telnetting to ports

Date: Wed, 30 Jun 1999 10:55:46 -0700 (PDT)
From: Ian White <iwhite@victoria.tc.ca>
To: Dave Wile <wildone@ns.sympatico.ca>
cc: csuite-tech@chebucto.ns.ca
Precedence: bulk
Return-Path: <csuite-tech-mml-owner@chebucto.ns.ca>

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On Wed, 30 Jun 1999, Dave  Wile wrote:

> Hello, this is a question regarding telnetting to a site with a port
> number behind it. We have a user at Cobequidnet.ns.ca who is attempting
> to telnet to the following site: telnet://tapestries.fur.com:2069
> If you just telnet like normal you have no problem but when you add the
> port number at the end, the program does not allow this, is this
> disabled in the csuite program for a reason or is it just something that
> we are missing at Cobequidnet that does not allow this? If there is not
> a reason for disabling this how do we enable telnetting to specific
> ports? 

Telnetting to ports is blocked in two places. The first is the one you're
running into which is the "no telnet port specifications" block. That is
part of the Lynx configuration. in the $CS_ROOT/bin/shell you'll find
-restrictions= and one of them will be telnet_port. If you remove this
then Lynx no longer complains when you specify a port to telnet to. This
one could probably be removed if you have the system resources to handle
users telnetting into MUDs, etc. all day. If you decide to remove it, you
probably only want to remove it for the non-anonymous section.

The second place is in the CSuite telnet client rtelnet which prevents
connections to any ports below 1024. This is to help system security by
not letting people telnet directly into SMTP servers, etc. This probably
shouldn't be changed, there typically isn't a reason to telnet into ports
that low.

Ian

-------------------------------------------
Ian White
BC Community Networks Association (BCCNA)
email: iwhite@victoria.tc.ca
phone: 250-727-2489


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