With dnsdist you can use a pool of resolvers in the background and set several
options. Like:
setUDPTimeout(num)
Set the maximum time dnsdist will wait for a response from a backend over
UDP, in seconds. Defaults to 2
See https://dnsdist.org/
Br,
Von: Unbound-users <unbound-users-boun...@lists.nlnetlabs.nl> Im Auftrag von
Frank Cusack via Unbound-users
Gesendet: Dienstag, 4. Juni 2024 01:32
An: Scott Q. <qm...@top-consulting.net>
Cc: unbound-users@lists.nlnetlabs.nl
Betreff: Re: Backup resolver after X seconds
How about pointing unbound to a local dnsmasq instance, configured to use
parallel upstreams?
https://serverfault.com/questions/732920/how-to-do-parallel-queries-to-the-upstream-dns-using-unbound
If you don't need some specific feature of unbound, you could just use dnsmasq
by itself.
On Mon, Jun 3, 2024 at 2:02 PM Scott Q.
<qm...@top-consulting.net<mailto:qm...@top-consulting.net>> wrote:
Some apps have even longer and don't even try a backup resolver
On Monday, 03/06/2024 at 15:57 Frank Cusack wrote:
Sorry that this isn't actually an answer, but does it matter? What client has a
5s timeout before the client moves on to its own next resolver?
On Mon, Jun 3, 2024 at 8:28 AM Scott Q. via Unbound-users
<unbound-users@lists.nlnetlabs.nl<mailto:unbound-users@lists.nlnetlabs.nl>>
wrote:
Is there a way to configure within Unbound a backup resolver for all queries
that take over 5 seconds for example ?
Aka, I'd like to forward to 8.8.8.8 all queries that I can't resolve for
whatever reason: network issues, firewalls, etc.
For example: dig +trace 77.184.100.61.in-addr.arpa
This sometimes takes 10 seconds to resolve, other times it times out completely
but 8.8.8.8 can return an answer within 1 second.
I also don't want to implement a per-host/network/domain solution, I just want
to forward all queries that take longer than 5 seconds.
Is it possible or is there an alternative ?
Thank you
