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Massive outgoing UDP traffic port 53

Discussion in 'Security' started by whplus, Oct 24, 2010.

  1. whplus

    whplus Well-Known Member

    Joined:
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    During recent days I received a massive increase in outgoing UDP traffic port 53. My server connection is going very slow.

    How do we resolve the problem?
    Should we block outgoing UDP port 53 requests? What's the implication?

    Fyi this is cpanel server 11.26.20 with external DNSOnly server.

    Your advice will be greatly appreciated.

    Thank you very much.
     
  2. inetbizo

    inetbizo Well-Known Member

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    Location:
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    Twitter:
    Code:
    include "/etc/rndc.key";
    
    controls {
        inet 127.0.0.1 allow { localhost; } keys { "rndc-key"; };
    };
    zone "." {
            type hint;
            file "/var/named/named.ca";
    };
    
    acl "trusted" {
    127.0.0.1;
    [COLOR="Red"]LIST YOUR NOC NS IPs HERE <===
    LIST YOUR OWN NS IPs HERE <===[/COLOR]
    10.20.9.0/24;
    };
    
    options {
       allow-recursion { trusted; };
       version   "<HIDDEN>";
    };
    
    ACL's in bind are access control list
     
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