amy~#nmap -p- -sR -I -O www.secret.com
Starting nmap V. 2.52 by fyodor@insecure.org ( www.insecure.org/nmap/ )

Interesting ports on foo.bar.com (42.43.44.45):
(The 65514 ports scanned but not shown below are in state: closed)
Port       State       Service (RPC)           Owner
21/tcp     open        ftp                     root
22/tcp     open        ssh                     root
23/tcp     open        telnet                  root
25/tcp     open        smtp                    mail
80/tcp     open        http                    http
110/tcp    open        pop-3                   root
111/tcp    filtered    sunrpc                  
113/tcp    open        auth                    root
220/tcp    filtered    imap3                   
443/tcp    open        https                   http
512/tcp    filtered    exec                    
513/tcp    filtered    login                   
514/tcp    filtered    shell                   
515/tcp    filtered    printer                 
516/tcp    filtered    videotex                
517/tcp    filtered    talk                    
518/tcp    filtered    ntalk                   
635/tcp    filtered    unknown                 
939/tcp    open        (status V1)             root
2049/tcp   filtered    nfs                     
3600/tcp   open        unknown                 root

TCP Sequence Prediction: Class=random positive increments
                         Difficulty=4797787 (Good luck!)

Sequence numbers: 702A7726 70243971 7059255D 70F3C86B 710DC518 704EBFEE
Remote operating system guess: Linux 2.1.122 - 2.2.14

Nmap run completed -- 1 IP address (1 host up) scanned in 467 seconds

