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>From: Mark A. Manske [mailto:mmanske@minter-weisman.com]
>why can someone telnet to your mail service?

You can't stop it[1]. Try "telnet <smtpserver> 25" from a command prompt on
a pc. The 25 identifies the port number to connect to on the remote machine,
port 25 is the mail port. If you restricted someone from telnetting to port
25 you'd also restrict another mail server from connecting.

-Walden

[1]There is a half-baked thing you can do that says if the data coming in is
being sent one byte at a time then disconnect since most servers send chunks
of data but telnet sends byte at a time. Of course telnet can be changed to
send line at a time so that wouldn't help too much.

------------
Walden H Leverich III
President
Tech Software
(516) 627-3800 x11
(208) 692-3308 eFax
WaldenL@TechSoftInc.com
http://www.TechSoftInc.com

Quiquid latine dictum sit altum viditur.
(Whatever is said in Latin seems profound.)



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