Maintained by: NLnet Labs

[Unbound-users] Unbound Slow to Prime

Mark Deneen
Sun Aug 7 05:58:04 CEST 2011


On Sat, Aug 6, 2011 at 4:19 PM, Alan Gutierrez <alan at prettyrobots.com>wrote:

> It used to be the case that I could flush the unbound cache and then
> resolve a name immediately. Now there is a long delay before I start to get
> results. It is especially bad on Fedora 15 running in VirtualBox on OS X
> Lion, but I'm also seeing it slow down on Fedora 15 at EC2. I updated
> root.hints, but that didn't seem to help. I can't make much sense of the
> debugging logging output. A couple weeks ago, flushing cache or restarting,
> you might notice a light delay on the first lookup, but now it takes a few
> minutes to get results other than timeouts.
>
>
It doesn't look like you would experience this within VirtualBox or EC2, but
I had a very similar issue with Unbound behind a Cisco ASA.  The ASA would
reject responses > 512 bytes.  You may find a wireshark trace worth your
time.

https://supportforums.cisco.com/message/3064602

-M
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