From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hamish Moffatt Subject: Re: Success! TWO questions remain Date: Fri, 13 Dec 2002 00:28:01 +1100 Sender: linux-hams-owner@vger.kernel.org Message-ID: <20021212132801.GA9699@silly.cloud.net.au> References: Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hams@vger.kernel.org On Thu, Dec 12, 2002 at 08:16:22AM -0500, mvw@mvw.net wrote: > Hello all, > > Wonder if anyone saw my previous message? > > In any case, another question. I want to be able to telnet into one > machine from another using radio. Encryption is forbidden for amateur use > so this means clear passwords. Not good. (Even though I will not use root, > of course). > > BUT, compression _is_ allowed. How can I get the tcp/ip content to be > compressed, so it is at least not easily readable? Compression is still hiding the data and I would say breaks the rules. Better solution: use SSH. You can have public key authentication (no cleartext passwords) without any encryption or compression. > PS plus, how can I get telnet to accept connections only on its radio > port? This is a generalLinux question but if anyone happens to know the > answer? telnetd usually starts from inetd, but inetd doesn't seem to have a way to only listen on certain interfaces. You could use TCP wrappers (ie /etc/hosts.{allow,deny}) to limit the IP addresses which are allowed to connect to ones which you know will be on the radio interface. Hamish -- Hamish Moffatt VK3SB