echo "Using Telnet as an authentication protocol over an untrusted network is insecure. However using the tool '/usr/bin/telnet' is a great way to connect one's keyboard with a tcp port on an ip address. It is ancient as far as unix goes, but is not outdated. I would go as far to say that one cannot be a good network administrator without using it on occasion. If one is operating without it then one missing part of one's potential. It will become out dated only when we stop using connection oriented, text based application protocols (http, smtp, pop3, imap, ftp, etc..). It can and should be used by sysadmins of all platforms because they all use those text based protocols. Very often the logs just don't show enough information and you need to try it yourself to see what is wrong." > /dev/fd0
Cory On Wed, Feb 05, 2003 at 03:17:38PM -0800, Ben Barrett wrote: > That's [at least] twice in one day, that you used telnet to prove your > point, Cory! Pretty good for an ancient and insecure protocol. Can you > prove any technical points using a floppy disk, next? ; ) > > thanks for the clarification (I know it wasn't open relay, but it seemed > odd that the message's source wasn't evident to me)... > > ciao, > > BenB > > On Wed, 2003-02-05 at 14:56, Cory Petkovsek wrote: > > An open relay means a server that re-sends outbound mail. If EFN was a > > open relay server then it would allow mail incoming from somewhere being > > sent to petersen-arne.com for instance. This message was sent to EFN > > thus is not being relayed. Observe: > > > > $ telnet clavin.efn.org 25 > > Trying 66.178.136.10... > > _______________________________________________ > Eug-LUG mailing list > [EMAIL PROTECTED] > http://mailman.efn.org/cgi-bin/listinfo/eug-lug _______________________________________________ Eug-LUG mailing list [EMAIL PROTECTED] http://mailman.efn.org/cgi-bin/listinfo/eug-lug
