In playing by the rules of the ToS' of my web server hosting companies (by not performing command line port scans from my dedicated servers) , can anyone recommend a thorough (free) online port scanning service to probe my local network?

(other than)

http://www.auditmypc.com/firewall-test.asp doesn't work, as I've tested it with open ports on my FW and it reports them to be closed

http://security.symantec.com/sscv6/d...d=ie&venid=sym as they've killed the, what used to be great scan.sygate.com

Thanks in advance