Forum Discussion

legacy1's avatar
legacy1
Alessandro Volta
2 days ago

DNSSEC problems today?

So I run bind and for some reason it was crashing restarting and when to my backup DNS as it restarts 

It seem something bad has gone wrong with DNSSEC and the only way to make bind stable was do this:

dnssec-validation no;

from this

dnssec-validation auto;

Anyone know whats going on?

6 Replies

  • legacy1's avatar
    legacy1
    Alessandro Volta

    So I think I have worked it out!....very interesting.

    So its to do with Acrylic DNS Proxy and Edge 

    So Acrylic DNS Proxy has been running fine and for some reason Edge is now doing DNS by TCP in the clear which my Acrylic DNS Proxy then does DNS by TCP in the clear to my bind which crashes BIND9.16.50 but not BIND9.16.3...

    looking at config options there is this "tcp-clients" which default is 150 which seems low so set to 1000 and now BIND9.16.50 does not crash. :D

     

  • legacy1's avatar
    legacy1
    Alessandro Volta

    So testing every other bind to see when it stops working it between BIND9.16.3 and BIND9.16.4...

    but why now? I'm sure BIND9.16.50 was running fine

    • Tudor's avatar
      Tudor
      Very Insightful Person

      Sorry cannot help as I run two Pi Hole DNS servers and they use their own version of DNS. What upstream DNS servers do you use?

      • legacy1's avatar
        legacy1
        Alessandro Volta

        I don't you can use root DNS to do the lookups you can do it with Pi Hole too

        https://docs.pi-hole.net/guides/dns/unbound/