Bill Davidsen wrote:
Ashley M. Kirchner wrote:
To drop or not to drop, that is the question. If there's a server
out there sending spam e-mail, and I use iptables to block it, is it
best to simply drop the packet, or should I do a '--reject-with
icmp-host-unreachable' (or 'icmp-port-unreachable') or just a
'tcp-reset'?
Basically, if I just drop the packet, the server in question would
simply continue to send stuff, wouldn't it? As far as it knows, its
spam reached the destination, whereas if I send something back, it
might actually acknowledge and stop? Yes? No?
If you drop, the sending host will often keep sending SYN packets until
it decides you are talking, maybe 3-10 packets.
If that were true, I would expect to see them in my log summary, and I
don't.
--
Cheers
John
-- spambait
1aaaaaaa@xxxxxxxxxxxxxxxx Z1aaaaaaa@xxxxxxxxxxxxxxxx
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http://www.catb.org/~esr/faqs/smart-questions.html
http://support.microsoft.com/kb/555375
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