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AutoSSL Fails for all accounts

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6 comments

  • cPanelMichael
    Hello @Bluemerlin, There are a few potential causes of this problem. For instance, I've seen a case where the data center blocked UDP connections to the root name servers. Could you open a support ticket using the link in my signature so we can take a closer look and figure out what's happening? You can post the ticket number here and we will update this thread with the outcome. Thanks!
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  • Bluemerlin
    Thanks I will do that.
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  • Mads Nordholm
    I have exactly the same issue. Have tried with both DC provided name servers and Google's public DNS. Same result. I would greatly appreciate a list of common reasons, since I know that all the domains in question resolve just fine.
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  • cPanelMichael
    Hello @Mads Nordholm, Feel free to open a support ticket so we can take a closer look and verify why the DNS resolution is failing. Thank you.
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  • Bluemerlin
    It is looking like I have found the problem. The Cisco that the server is sitting behind was using the default DNS packet length of 512. I have increased this to 1500 using. fixup protocol dns maximum-length 1500 The console message that gave me the clue was Dropped UDP DNS reply from outside:192.5.5.241/53 to Servers:xxx.xxx.xxx.xx/46173; packet length 517 bytes exceeds configured limit of 512 bytes This appears to have fixed it for most of all the sites (once a quota issue was fixed).
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  • cPanelMichael
    It is looking like I have found the problem. The Cisco that the server is sitting behind was using the default DNS packet length of 512. I have increased this to 1500 using. fixup protocol dns maximum-length 1500 The console message that gave me the clue was Dropped UDP DNS reply from outside:192.5.5.241/53 to Servers:xxx.xxx.xxx.xx/46173; packet length 517 bytes exceeds configured limit of 512 bytes This appears to have fixed it for most of all the sites (once a quota issue was fixed).

    I'm happy to see the issue is now resolved. Thank you for updating this thread with the outcome.
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