BIND 9 recursive queries returning SERVFAIL for 'legit' domain

Ian Springett ian.springett at
Wed Jun 17 08:45:37 UTC 2020

I have an issue with BIND 9.14.11 and recursive queries to one particular domain. DIG result is SERVFAIL and 'bad cookie' is logged in /var/log/messages & /var/log/

The domain has two DNS servers behind a load balancer which is causing the bad cookie result. Would this in itself be enough to cause the SERVFAIL and if so is there a way to have exceptions for known 'good' domains?

Ian Springett
Hosted Services Engineer
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Giacom World Networks Ltd
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