Security
by alpha-male
The first answer is definitely correct. You'll want to use the tools hackers use and learn their techniques. There are a couple good books out there worth reading in the "Hacking Exposed" series. They may even have one that's netware specific. Also,take a look at www.packet-level.com. You'll find tools, tips, how tos and reference material (along with a ton of good links). I learned a LOT from Laura's site and her seminar.
The PODBooks are great too...for network performance, troubleshooting and security.
Hope this helps!
by alveden
If you are familiar with unix base system like solaris, linux, *BSD, etc. You can use the following tools for network penetration test and scanning. But you need to have some compilation skill.
nmap
http://www.insecure.org/nmap/nmap_download.html
A port scanner - I believe there is a windows base version as well.
saint
http://www.wwdsi.com/products/saint_engine.html
Does penetration test on network services.
nessus
http://www.nessus.org/
Does penetration test on network services.
Down below is a few commercial network security scanner.
http://www.clearview.co.uk/securescan_nx.htm
http://www.iss.net/products_services/enterprise_protection/vulnerability_assessment/scanner_internet.php
by pierrejamme
A quick simple test is to go to Gibson Research at www.GRC.com and "Test My Shields" and "Probe My Ports". Might give you some peace of mind while you learn how to do all the other answers, or you may pull the plug on the Internet. I have three locations running NetWare and so far people seem to leave them alone. I'm sure this won't last but NDS is comforting now.
I also recommend setting "Intruder Lockout" from the default of 24 hours to seven days, as you may not even know Admin has been locked out. I just happen to notice the Console at one location where the Admin had been "Intruder Locked Out" for three of the last five days.
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