Options single request etc resolv conf

Slow DNS lookups can have many reasons.

But today i had a harder one, but was easy to fix if you know how…. So I started to debug it.

Slow DNS resolving with Linux systems against Windows DNS server | Robert Penz Blog

Took five seconds until i saw a connection on port As expected, not an error within puppet. It sends out two DNS request, one for the A record and one for the AAAA record.

This is the default since glbc 2. But i only get back one answer waiting for the second.

Looks like a problem on your DNS proxy which sits on our firewall or the DNS behind. The second option sounds exactly like my problem. More detail should be: The man page of resolv.

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