At 07:11 PM 12/7/98 -0500, you wrote:
>On Mon, Dec 07, 1998 at 04:16:05PM -0000, [EMAIL PROTECTED] wrote:
>> I have TCP Wrappers on my sendmail to keep people from using
me as a relay for spam.
>
>Footnote: that's not necessary, although it's not a bad idea. Sendmail 8.9.1
>comes configured with relaying turned off by default.
Correction: I run qMail with TCP Wrappers. (MUCH simpler to
configure for no relaying than sendmail).
>Another trick, by the way: enable port 79 (finger) and log all attempted
>access to it. Or enable 23 (telnet), etc. You'd be amazed at what kinds
>of interesting packets you'll snarf if you monitor well-known ports to
>see who's tickling them.
Another thing is to disable zone transfers from DNS. This will
stop someone from extracting system names from your DNS (giving
targets to attack).
Matt Soffen
==============================================
Boss - "My boss says we need some eunuch programmers."
Dilbert - "I think he means UNIX and I already know UNIX."
Boss - "Well, if the company nurse comes by, tell her I said
never mind."
- Dilbert -
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