Are these ports dangerous for incoming traffic?

[Andre Bell]

Are any of these ports dangerous to leave open?  I scanned my linux box and
these are the ports that are actually open when using local tools and
intrusion tools online at www.doshelp.com:
          Port    State       Protocol  Service
          1       open        tcp        tcpmux          
          11      open        tcp        systat          
          15      open        tcp        netstat         
          79      open        tcp        finger          
          111     open        tcp        sunrpc          
          119     open        tcp        nntp            
          143     open        tcp        imap2           
          515     open        tcp        printer         
          540     open        tcp        uucp            
          635     open        tcp        unknown         
          1068    open        tcp        instl_bootc     
          1080    open        tcp        socks           
          1524    open        tcp        ingreslock      
          2000    open        tcp        callbook        
          3128    open        tcp        squid-http      
          6000    open        tcp        X11             
          6667    open        tcp        irc             
          12345   open        tcp        NetBus          
          12346   open        tcp        NetBus          

Thanks

Andre

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