I have had some abnormal results using nmap 4.10 to do a syn TCP scan on a particuylar external network range. When i ran the scan as a full port scan of 0-65535, all ports are found to be filtered. Yet we know that port 10443 is open, and when i do a scan on that port, it is found to be open.
This has meant a number of open ports have been missed in scanning this range.
Is there something obvious that i have omitted, other more usual ports were found open on other hosts.
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# Nmap 4.10 scan: nmap -sS -P0 -p0-65535 -T4 -oA outputfile xx.xx.xx.xx/24
All 65536 scanned ports on host (xx.xx.xx.yy) are filtered
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nmap -sS -P0 -p10443 xx.xx.xx.yy -T4
Starting Nmap 4.10
Interesting ports on host (xx.xx.xx.yy):
PORT STATE SERVICE
10443/tcp open unknown
Nmap finished: 1 IP address (1 host up) scanned in 4.560 seconds
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thanks for your time
Shanna
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Received on Jan 14 2007
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