Here's another good one... quite a bit more powerful than nmap...
www.nessus.org
it's a little tricky to set up, but the info you'll get from it is VERY
informative. Check out the website they show a sample report which
comes with a suggested solution for any potential weaknesses.
On Thu, 2002-06-13 at 08:39, Jeromey Hannel wrote:
> some day I will run out of these
>
> nmap
> Nmap ("Network Mapper") is an open source utility for network exploration or
> security auditing. It was designed to rapidly scan large networks, although
> it works fine against single hosts. Nmap uses raw IP packets in novel ways
> to determine what hosts are available on the network, what services (ports)
> they are offering, what operating system (and OS version) they are running,
> what type of packet filters/firewalls are in use, and dozens of other
> characteristics. Nmap runs on most types of computers, and both console and
> graphical versions are available. Nmap is free software, available with full
> source code under the terms of the GNU GPL
>
>
> www.insecure.com/nmap
>
