Insufficient responses for TCP sequencing (3), OS detection may be less accurate
Interesting ports on tri.shenry.k12.in.us (165.138.167.1):
(The 1519 ports scanned but not shown below are in state: closed)
Port       State       Service
21/tcp     open        ftp                     
25/tcp     open        smtp                    
27/tcp     open        nsw-fe                  
42/tcp     open        nameserver              
53/tcp     open        domain                  
80/tcp     open        http                    
110/tcp    open        pop-3                   
119/tcp    open        nntp                    
135/tcp    open        loc-srv                 
139/tcp    open        netbios-ssn             
143/tcp    open        imap2                   
389/tcp    open        ldap                    
443/tcp    open        https                   
563/tcp    open        snews                   
593/tcp    open        http-rpc-epmap          
636/tcp    open        ldapssl                 
993/tcp    open        imaps                   
995/tcp    open        pop3s                   
1031/tcp   open        iad2                    
1127/tcp   open        supfiledbg              
5631/tcp   open        pcanywheredata          
6667/tcp   open        irc                     
6668/tcp   open        irc                     

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

# Nmap run completed at Sat Jun  2 08:40:11 2001 -- 1 IP address (1 host up) scanned in 7 seconds