Subject: Re: Telnet to open ports
From: Ruprecht, Chris (cruprech@compucom.com)
Date: Mon Oct 01 2001 - 08:39:33 MDT
A telnet client program can be used to connect to a host machine to any
port specified over a TCP/IP network. On a host machine, a telnet server
(telnetd) is listening to incoming requests on port 23 and most telnet
clients use port 23 if no other port number is specified.
Telnet clients are very useful tools if you would like to test some
protocol manually, such as ftp, http or smtp. disabling your telnetd
server process will not prevent people from accessing any of your other
services via a telnet or any other client program.
if you want to restrict access to your machine, I suggest installing
some firewall. If you're on a cable or dsl modem, one of these little
cable/dsl routers will do the job, or you can install firewall software
(like ipchains) on your Linux machine.
Best regards,
Chris
This archive was generated by hypermail 2a24 : Mon Oct 01 2001 - 07:53:05 MDT