ACK Scan against Docsrv # nmap -sA -T4 docsrv.caldera.com Starting nmap 3.77 ( http://www.insecure.org/nmap/ ) Interesting ports on docsrv.caldera.com (216.250.128.247): (The 1661 ports scanned but not shown below are in state: UNfiltered) PORT STATE SERVICE 135/tcp filtered msrpc 1434/tcp filtered ms-sql-m Nmap run completed -- 1 IP address (1 host up) scanned in 7.207 seconds