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Thread: Bind9 DNS server not responding

  1. #1
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    Nov 2012
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    Bind9 DNS server not responding

    I have a few Windows boxes all using an Ubuntu server for their primary DNS server... Its worked great for 8 months, however yesterday there was a power cut, and now DNS server isn't responding...

    I lost connection with the Ubuntu server at the time, I went and dug it out, reset it and connected via ssh, it can access the internet, Apache is working and Bind seems to be running, I've updated all the files with the new IP addresses, incremented the serial, rebooted the server and still nothing,

    the Windows computers all say that the DNS server isn't responding,

    can anyone point me in the right direction for recovering this function?
    Thanks

  2. #2
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    Re: Bind9 DNS server not responding

    Code:
    dig @ip.of.bind.server txt chaos version.bind
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  3. #3
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    Re: Bind9 DNS server not responding

    I ran that and got a warning for recursion being unavailable, but otherwise it found the server... and this is from a separate office...

    ; <<>> DiG 9.8.1-P1 <<>> @[*server ip*] txt chaos version.bind
    ; (1 server found)
    ;; global options: +cmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15299
    ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0
    ;; WARNING: recursion requested but not available

    ;; QUESTION SECTION:
    ;version.bind. CH TXT

    ;; ANSWER SECTION:
    version.bind. 0 CH TXT "9.8.1-P1"

    ;; AUTHORITY SECTION:
    version.bind. 0 CH NS version.bind.

    ;; Query time: 91 msec
    ;; SERVER: [*server ip*]#53([*server ip*])
    ;; WHEN: Tue Feb 26 17:06:03 2013
    ;; MSG SIZE rcvd: 65

  4. #4
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    Re: Bind9 DNS server not responding

    Can the Windows boxen ping the dns server?
    also you could try
    Code:
    telnet IP.of.dns.server 53
    from the Windows boxes (testing for firewall or other intervening mechanism). Can they telnet to the dns host?

    Please let us know...
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  5. #5
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    Re: Bind9 DNS server not responding

    Quote Originally Posted by Habitual View Post
    Can the Windows boxen ping the dns server?
    also you could try
    Code:
    telnet IP.of.dns.server 53
    from the Windows boxes (testing for firewall or other intervening mechanism). Can they telnet to the dns host?

    Please let us know...
    Typing in the IP address of the server into a windows box brings up the page in apache2, I've checked from "http://www.yougetsignal.com/tools/open-ports/" and port 53 appears to be open, I can ssh/telnet into the system no problems...
    any ideas?

  6. #6
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    Re: Bind9 DNS server not responding

    not a clue. Sorry.
    Someone with more dns.fu will be along to help.
    DorkBlog

    If you want something you've never had, then you must do things you've never done.
    Tools every shell scripter should have, explainshell, shellcheck, and crontab sandbox.

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