[dnsdist] Keep Client IP across dnsdist and PDNSRecursor

Daniel Stirnimann daniel.stirnimann at switch.ch
Wed May 4 11:45:44 UTC 2016

> The most clean example is when someone queries for a domain, dnsdist
> send the query to the recursor, the recursor gets a SERVFAIL and get
> back to the dnsdist something like.
> Sending SERVFAIL to during resolve of '58cl.com.' because:
> Too much time waiting for 58cl.com.|A, timeouts: 5, throttles: 0,
> queries: 7, 7898msec

dnsdist will always send queries to your pool servers using its own IP
address. So, you need to allow dnsdist to lookup domain names on your
server or else it gets a REFUSED answer or runs into timeout (in that
case the server is propably indicated as DOWN).


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