Insufficient responses for TCP sequencing (3), OS detection may be less accurate
Interesting ports on valleylab.com (216.167.77.50):
(The 1528 ports scanned but not shown below are in state: closed)
Port       State       Service
21/tcp     open        ftp                     
23/tcp     open        telnet                  
80/tcp     open        http                    
135/tcp    open        loc-srv                 
139/tcp    open        netbios-ssn             
443/tcp    open        https                   
465/tcp    open        smtps                   
512/tcp    open        exec                    
513/tcp    open        login                   
1433/tcp   open        ms-sql-s                
5631/tcp   open        pcanywheredata          
5800/tcp   open        vnc                     
5900/tcp   open        vnc                     
65301/tcp  open        pcanywhere              

Remote OS guesses: Windows NT4 / Win95 / Win98, Windows NT 4 SP3, Microsoft NT 4.0 Server SP5 + 2047 Hotfixes

# Nmap run completed at Tue Jun  5 22:30:10 2001 -- 1 IP address (1 host up) scanned in 7 seconds