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Thread: cerocscotland DNS broken?

  1. #1
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    cerocscotland DNS broken?

    Probably not the best place to ask if anyone else is having problems accessing the forum, since most people having problems will not see the question...

    Presumably whether or not you have the problem will depend on which ISP you use, I have no idea how widespread the problem is.

    It appears that at least one of the global top level DNS servers is serving the wrong address for ns1.cerocscotland.com.

    It appears that with my ISP (maybe also with others), if the first nameserver returned by the global top level domain server does not point to a working DNS server it fails to resolve any names within the domain.
    Whilst not trying the second nameserver is probably a violation of standards there may be a number of ISPs which do so.

    Some technical stuff which might help explain the above follows:
    Code:
    debian:/# dig @k.gtld-servers.net cerocscotland.com ns
    
    ; <<>> DiG 9.5.1-P1 <<>> @k.gtld-servers.net cerocscotland.com ns
    ; (1 server found)
    ;; global options:  printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42243
    ;; flags: qr rd; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 2
    ;; WARNING: recursion requested but not available
    
    ;; QUESTION SECTION:
    ;cerocscotland.com.             IN      NS
    
    ;; ANSWER SECTION:
    cerocscotland.com.      172800  IN      NS      ns1.cerocscotland.com.
    cerocscotland.com.      172800  IN      NS      ns2.cerocscotland.com.
    
    ;; ADDITIONAL SECTION:
    ns1.cerocscotland.com.  172800  IN      A       64.120.163.199
    ns2.cerocscotland.com.  172800  IN      A       64.120.163.198
    
    ;; Query time: 48 msec
    ;; SERVER: 192.52.178.30#53(192.52.178.30)
    ;; WHEN: Mon Jan 11 19:19:36 2010
    ;; MSG SIZE  rcvd: 103
    
    debian:/# dig @64.120.163.199 forum.cerocscotland.com
    
    ; <<>> DiG 9.5.1-P1 <<>> @64.120.163.199 forum.cerocscotland.com
    ; (1 server found)
    ;; global options:  printcmd
    ;; connection timed out; no servers could be reached
    
    debian:/# dig @64.120.163.198 forum.cerocscotland.com
    
    ; <<>> DiG 9.5.1-P1 <<>> @64.120.163.198 forum.cerocscotland.com
    ; (1 server found)
    ;; global options:  printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15553
    ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
    ;; WARNING: recursion requested but not available
    
    ;; QUESTION SECTION:
    ;forum.cerocscotland.com.       IN      A
    
    ;; ANSWER SECTION:
    forum.cerocscotland.com. 600    IN      A       64.120.163.197
    
    ;; AUTHORITY SECTION:
    forum.cerocscotland.com. 86400  IN      NS      ns1.cerocscotland.com.
    forum.cerocscotland.com. 86400  IN      NS      ns2.cerocscotland.com.
    
    ;; ADDITIONAL SECTION:
    ns1.cerocscotland.com.  14400   IN      A       64.120.163.197
    ns2.cerocscotland.com.  14400   IN      A       64.120.163.198
    
    ;; Query time: 108 msec
    ;; SERVER: 64.120.163.198#53(64.120.163.198)
    ;; WHEN: Mon Jan 11 19:20:45 2010
    ;; MSG SIZE  rcvd: 125

  2. #2
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    Re: cerocscotland DNS broken?

    Quote Originally Posted by jiveclone View Post
    Probably not the best place to ask if anyone else is having problems accessing the forum, since most people having problems will not see the question...

    Presumably whether or not you have the problem will depend on which ISP you use, I have no idea how widespread the problem is.

    It appears that at least one of the global top level DNS servers is serving the wrong address for ns1.cerocscotland.com.

    It appears that with my ISP (maybe also with others), if the first nameserver returned by the global top level domain server does not point to a working DNS server it fails to resolve any names within the domain.
    Whilst not trying the second nameserver is probably a violation of standards there may be a number of ISPs which do so.

    Some technical stuff which might help explain the above follows:
    Code:
    debian:/# dig @k.gtld-servers.net cerocscotland.com ns
    
    ; <<>> DiG 9.5.1-P1 <<>> @k.gtld-servers.net cerocscotland.com ns
    ; (1 server found)
    ;; global options:  printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42243
    ;; flags: qr rd; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 2
    ;; WARNING: recursion requested but not available
    
    ;; QUESTION SECTION:
    ;cerocscotland.com.             IN      NS
    
    ;; ANSWER SECTION:
    cerocscotland.com.      172800  IN      NS      ns1.cerocscotland.com.
    cerocscotland.com.      172800  IN      NS      ns2.cerocscotland.com.
    
    ;; ADDITIONAL SECTION:
    ns1.cerocscotland.com.  172800  IN      A       64.120.163.199
    ns2.cerocscotland.com.  172800  IN      A       64.120.163.198
    
    ;; Query time: 48 msec
    ;; SERVER: 192.52.178.30#53(192.52.178.30)
    ;; WHEN: Mon Jan 11 19:19:36 2010
    ;; MSG SIZE  rcvd: 103
    
    debian:/# dig @64.120.163.199 forum.cerocscotland.com
    
    ; <<>> DiG 9.5.1-P1 <<>> @64.120.163.199 forum.cerocscotland.com
    ; (1 server found)
    ;; global options:  printcmd
    ;; connection timed out; no servers could be reached
    
    debian:/# dig @64.120.163.198 forum.cerocscotland.com
    
    ; <<>> DiG 9.5.1-P1 <<>> @64.120.163.198 forum.cerocscotland.com
    ; (1 server found)
    ;; global options:  printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15553
    ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
    ;; WARNING: recursion requested but not available
    
    ;; QUESTION SECTION:
    ;forum.cerocscotland.com.       IN      A
    
    ;; ANSWER SECTION:
    forum.cerocscotland.com. 600    IN      A       64.120.163.197
    
    ;; AUTHORITY SECTION:
    forum.cerocscotland.com. 86400  IN      NS      ns1.cerocscotland.com.
    forum.cerocscotland.com. 86400  IN      NS      ns2.cerocscotland.com.
    
    ;; ADDITIONAL SECTION:
    ns1.cerocscotland.com.  14400   IN      A       64.120.163.197
    ns2.cerocscotland.com.  14400   IN      A       64.120.163.198
    
    ;; Query time: 108 msec
    ;; SERVER: 64.120.163.198#53(64.120.163.198)
    ;; WHEN: Mon Jan 11 19:20:45 2010
    ;; MSG SIZE  rcvd: 125

  3. #3
    The Dashing Moderator
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    Re: cerocscotland DNS broken?

    I've been having problems with some ISPs too.

    My work PC today refused to recognise the forum.cerocscotland.com address. On a Plusnet account I was having problems yesterday/this morning too.
    Love dance, will travel

  4. #4
    Dickie Davies' love-child Cruella's Avatar
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    Re: cerocscotland DNS broken?

    I have no idea what on earth you just said but I have had problems getting on here too when others seemed to be able to access it fine.

  5. #5
    Registered User emmylou25's Avatar
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    Re: cerocscotland DNS broken?

    I'm not sure what you said either, but I had problems on my home laptop last night, and this morning it gave me an error when I used my history, but was fine when I came in via the old web address.

  6. #6
    Registered User gamebird's Avatar
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    Re: cerocscotland DNS broken?

    I can get on fine from work (!) but can't access from home - maybe it's Firefox..?

  7. #7
    Registered User daveb9000's Avatar
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    Re: cerocscotland DNS broken?

    The forum has recently been moved to a new server, it may just be that not all ISP caches have cought up with the new address yet.

  8. #8
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    Re: cerocscotland DNS broken?

    Quote Originally Posted by daveb9000 View Post
    The forum has recently been moved to a new server, it may just be that not all ISP caches have cought up with the new address yet.
    Try this...

    Go to start run, type cmd hit return (opens up a black command prompt window)

    type:
    ipconfig /flushdns

    and hit return

    Close command prompt window

  9. #9
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    Re: cerocscotland DNS broken?

    Quote Originally Posted by Alan Doyle View Post
    Try this...

    Go to start run, type cmd hit return (opens up a black command prompt window)

    type:
    ipconfig /flushdns

    and hit return

    Close command prompt window
    Flushing the local DNS resolver cache (i.e. the cache on your machine) will not help if your ISP has incorrect information in their cache.

  10. #10
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    Re: cerocscotland DNS broken?

    Quote Originally Posted by daveb9000 View Post
    The forum has recently been moved to a new server, it may just be that not all ISP caches have cought up with the new address yet.

    it can take a couple of days to propogate across all servers. Will prob bo ok in a day or two

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