Disable AAAA lookups in Unbound DNS

Set up machine

vagrant up

Testing

1st vagrant ssh session:

vagrant@precise64:~$ sudo unbound -dv -c /etc/unbound/unbound.conf

2nd vagrant ssh session:

vagrant@precise64:~$ dig google.com AAAA @8.8.8.8
vagrant@precise64:~$ dig google.com AAAA @localhost

Run above commands twice and check query time.

Production

• Point resolv.conf to 127.0.0.1
• unbound.conf: Proper logfile, lower verbosity
• Uncomment auto-trust-anchor-file for DNSSEC support

Version

vagrant@precise64:~$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 12.04 LTS
Release:	12.04
Codename:	precise

vagrant@precise64:~$ unbound -h
Version 1.4.16
linked libs: libevent 2.0.16-stable (it uses epoll), ldns 1.6.11, OpenSSL 1.0.1 14 Mar 2012
linked modules: python validator iterator
configured for x86_64-unknown-linux-gnu on Wed Feb  8 05:48:44 UTC 2012 with options: '--prefix=/usr' '--sysconfdir=/etc' '--disable-rpath' '--with-pidfile=/var/run/unbound.pid' '--with-libevent' '--with-pythonmodule' '--with-pyunbound'