Starting nmap V. 2.53 by fyodor@insecure.org ( www.insecure.org/nmap/ )
Interesting ports on sec-linux.lab.sec (192.168.0.20):
(The 65523 ports scanned but not shown below are in state: closed)
Port       State       Service
21/tcp     open        ftp                    
79/tcp     open        finger                 
111/tcp    open        sunrpc                 
113/tcp    open        auth                   
512/tcp    open        exec                   
513/tcp    open        login                  
514/tcp    open        shell                  
515/tcp    open        printer                
3001/tcp   open        nessusd                
18667/tcp  open        unknown                
31221/tcp  open        unknown                

Nmap run completed -- 1 IP address (1 host up) scanned in 33 seconds