[This thread is off topic, but ... ]
On 24 September 1999 at 3:00, "Rodney W. Grimes" <[EMAIL PROTECTED]> wrote:
> Another thing that ISP coulds start doing (we are in process with
> this now, but on a monitoring only basis, instead of a deny we
> just log them) is to block all outbound from AS tcp 25 setup packets.
Monitoring this is not a bad idea. However, if you are suggesting
that an ISP should /filter/ TCP port 25 packets, I have to disagree
strongly. Vehemently, even :-)
An ISP is in the business of delivering IP traffic. An ISP that fails
to deliver ALL packets that are well formed (according to the relevant
IETF standards and have a legitimate source address) is not doing what
they are being payed to do.
> This prevents your customers from being something that could get you
> on the RBL or the DUL MAP for bad behavior, it also inforces the use
> of your smart host relay, as it/they is/are the only way to get a
> tcp port 25 setup completed.
Evil! How does the ISP know I'm not running some other protocol
(which is none of its business) on port 25? How does it know that I
don't have a policy reason for accessing some other mail server than
its own?
Don't throw out the baby with the water!
end-of-rant :-)
Jacques Vidrine / [EMAIL PROTECTED] / [EMAIL PROTECTED]
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