In my humble opinion GRC.com does not do a very important port test
anymore. No longer are they testing port 80.
I personnaly go "offsite" and use foundstone's superscan to test the
ports.
http://www.foundstone.com/knowledge/scanning.html
>From an externally connected computer use superscan and ping yourself to
see
what ports are full open and "resolvable".
Here are some others:
http://scan.sygatetech.com/
useful tests: Stealth Scan, Trojan Scan, TCP Scan, UDP Scan, ICMP
http://www.securitymetrics.com
useful tests: Port Scan
http://www.dslreports.com/scan
useful tests: 'online security analysis'
http://www.anti-trojan.net/at.asp?l=en&;t=onlinecheck
useful tests: Trojan Scan
http://www.blackcode.com/scan/index.php
useful tests: Port Scan, Trojan Scan
10:56:07 PM 
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