www.NWPSW.com has a pretty good port scanner in NetScanTools 4.0, which is
useful for other Windows tcp/ip tasks, too.
For host security, www.zonelarm.com can block ports with "no reponse", ie,
no response to probe, and helps out on the DDOS problem by blocking all of
a windows machine's OUTBOUND traffic (ie, DDOS agents) unless specifically
enabled.
http://advice.networkice.com has black ice, a detection intrusion product
for windows with graphical real-time displays of attacks in progress, so
you know when this and other @ssholes mount their attacks, if not their
girlfriends. One of my leased-line customers scared himself white watching
as Black Ice expose all the sh|t that was being thrown at his desktop
PC. today, the saying should be "as sure as death, taxes, and scanning"
www.GRC.com will scan you for free, these people
http://www.automatedscanning.com/ will do it for fee, probably more
aggressively.
http://www.interhack.net/pubs/fwfaq/, if you're new to network security and
firewalls.
You can build very effective stateful, packet filtering, logging
firewall/router with FreeBSD and Darren Reed's ipfilter, both free.
For host security, I can email you HP's .pdf of "Building a Windows NT
bastion host in practice" written by one of their consultants in Sweden,
dated 1999-09. comprehensive.
The guy may try to take out your DNS (run BIND 8.2.2 p5) and your mail
server, too, never mind your NT turkeys. postfix and qmail claim a lot
more mail security than sendmail. postfix on FreeBSD can be an extremely
effective mail gateway "in front of" your mail server. I've got a mailing
list for the Imail people, but not really restricted to them, for a project
I call IMGate, which is postfix on FreeBSD configured as a defensive,
relay-only mail gateway. You can join my list join here:
mailto:[EMAIL PROTECTED]?subject=subscribe%20IMGate
Len < still waiting for Michael Dinowitz to fix his broken DNS records for
HOF mail server that postfix is warning me of wrong forward/reverse records >
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