BCP blocking list for edge networks? (was: ingress SMTP)

[jra at baylink.com (Jay R. Ashworth)]

Ok, mine is actualy even edgier than that; no transit at all, to
paraphrase Steeley Dan.

But does anyone have a pointer to a good set of ports to block in each
direction through my Shorewall DNAT setup, preferably annotated?

On reflection, that's actually only outbound; the necessity to set up
inbound DNAT manually makes it a default-deny environment, which is one
of the reasons that some people like NAT as a component of an edge
firewall.

Cheers,
-- jra
-- 
Jay R. Ashworth                   Baylink                      jra at baylink.com
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