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Re: Bind suddenly starts responding clients with servfail

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  Re: Bind suddenly starts responding clients with servfail Greg Rivers <gcr+bind-users@tharned.org> - 2020-05-07 21:03 -0500

#15741 — Re: Bind suddenly starts responding clients with servfail

On Monday, 27 April 2020 03:59:39 CDT Søren Andersen wrote:
> I'm running a few BIND servers, but lately one of my servers suddenly starts
> responding to clients with servfail for every request from the clients, and
> BIND doesn't respond to the rndc or statistics interface anymore.
> 
> My logs for client-channel show me this:
> 25-Apr-2020 21:52:04.501 client @XX XX.37#2921 (google.dk): no more
> recursive clients (1000/900/1000): quota reached
> 
> I've removed all the dns traffic from the server, and the quota is still
> reached after 6+ hours?
> 
> Do you guys have some clue what all this is about? - Or any suggestions
> where to look for any further information?
> 
> I'm running BIND 9.16.1 on CentOS 7:
>
I've had the very same thing happen twice in the past two weeks on different production recursive servers running BIND 9.16.2 on FreeBSD. I've opened a ticket with ISC, and they are looking into it. Can you share any additional information that might aid troubleshooting?

If anyone else experiences this, please report it.

-- 
Greg

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