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Plenty of ZEROs 0000000000000, normal?

Discussion in 'General Discussion' started by brendanrtg, Feb 8, 2007.

  1. brendanrtg

    brendanrtg Well-Known Member

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    We did a netstat -na and see tons of zeros as follows:

    Active Internet connections (servers and established)
    Proto Recv-Q Send-Q Local Address Foreign Address State
    tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN
    tcp 0 0 66.90.77.53:53 0.0.0.0:* LISTEN
    tcp 0 0 66.90.77.52:53 0.0.0.0:* LISTEN
    tcp 0 0 66.90.77.51:53 0.0.0.0:* LISTEN
    tcp 0 0 66.90.77.50:53 0.0.0.0:* LISTEN
    tcp 0 0 66.90.78.94:53 0.0.0.0:* LISTEN
    tcp 0 0 66.90.78.93:53 0.0.0.0:* LISTEN
    tcp 0 0 66.90.78.92:53 0.0.0.0:* LISTEN
    tcp 0 0 208.53.143.62:53 0.0.0.0:* LISTEN
    tcp 0 0 208.53.143.61:53 0.0.0.0:* LISTEN
    tcp 0 0 208.53.143.60:53 0.0.0.0:* LISTEN
    tcp 0 0 208.53.143.59:53 0.0.0.0:* LISTEN
    tcp 0 0 66.90.78.91:53 0.0.0.0:* LISTEN
    tcp 0 0 208.53.143.58:53 0.0.0.0:* LISTEN
    tcp 0 0 208.53.143.57:53 0.0.0.0:* LISTEN
    tcp 0 0 208.53.143.56:53 0.0.0.0:* LISTEN
    tcp 0 0 208.53.143.55:53 0.0.0.0:* LISTEN
    tcp 0 0 208.53.143.54:53 0.0.0.0:* LISTEN
    tcp 0 0 208.53.143.53:53 0.0.0.0:* LISTEN
    tcp 0 0 208.53.143.52:53 0.0.0.0:* LISTEN
    tcp 0 0 208.53.143.51:53 0.0.0.0:* LISTEN
    tcp 0 0 208.53.143.50:53 0.0.0.0:* LISTEN


    Is this normal?
     
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  2. ujr

    ujr Well-Known Member

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    perfectly normal...it;s listening on localhost
     
  3. chirpy

    chirpy Well-Known Member

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    Go on, have a guess
    strictly speaking 0.0.0.0 is the wildcard address (i.e. listening on all IP addresses), as opposed to localhost which is usually 127.0.01 :)
     
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  4. brendanrtg

    brendanrtg Well-Known Member

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    This wildcard address is not sounding good at all.

    Can we setup

    the system to listen only on localhost?
     
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  5. chirpy

    chirpy Well-Known Member

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    If you don't want to listen on each IP address for named, then shut it down. If you only want to use it for local lookups, deny access to it in iptables. Same goes for FTP, if that's what you really want to do - seems an odd thing to do.
     
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  6. brendanrtg

    brendanrtg Well-Known Member

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    You are right, we dont really want to do that. Its was a silly question. :eek:
     
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