After having done some tests with the Altavista firewall, it seems to me
that it's a little too sensitive to multiple connections.
When SYN flooding it with 20.000 connections to port 25, the smtp proxy
seems to hang, and a restart of smtp is necessary.
Actually, it seems that any kind of connection, even real smtp connections,
will cause the proxy to hang, if the number of concurrent connections
exceeds 20 (default value)
If anyone could confirm this behaviour, or provide me with additional
information, i.e. a workaround to this Denial of Service, I would, needless
to say, be very grateful.
My system is running NT 4.0 SP5 and Altavista Firewall 98 SP2
Regards
Jesper
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