Insufficient responses for TCP sequencing (3), OS detection may be less accurate
Interesting ports on mail.iss.org.uk (194.238.79.231):
(The 1527 ports scanned but not shown below are in state: closed)
Port       State       Service
21/tcp     open        ftp                     
23/tcp     filtered    telnet                  
25/tcp     filtered    smtp                    
80/tcp     open        http                    
110/tcp    open        pop-3                   
135/tcp    open        loc-srv                 
137/tcp    filtered    netbios-ns              
138/tcp    filtered    netbios-dgm             
139/tcp    filtered    netbios-ssn             
443/tcp    open        https                   
1030/tcp   open        iad1                    
1080/tcp   filtered    socks                   
5631/tcp   open        pcanywheredata          
8080/tcp   filtered    http-proxy              
65301/tcp  open        pcanywhere              

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

# Nmap run completed at Wed Jun  6 00:08:24 2001 -- 1 IP address (1 host up) scanned in 21 seconds