Hi All,
I've just started looking at Unbound, under FreeBSD 9, currently running
unbound 1.4.17.
I have three 'local' nameservers on our LAN, and I've been using:
"
forward-zone:
name: "."
forward-addr: 1.1.1.1
forward-addr: 2.2.2.2
forward-addr: 3.3.3.3
forward-first: yes
"
[obviously 'example' IP's!]
This seems to work fine - i.e. under normal circumstances, queries are
answered fine. If I deliberately "fail" 1.1.1.1 - queries are still
answered, ditto if I fail 2.2.2.2 as well - they are all sent to 3.3.3.3 to
be resolved, and the system can still resolve names.
In 1.4.17 how are forwarders selected? - From syslog/verbose logging - it
appears it latches onto one, and stays with it (maybe the fastest
responder?)
Is there any way of seeing (e.g. from 'unbound-control dump_infra') which
forwarders it considers 'available' or 'not available' / down?
Also, can someone clarify what 'forward-first' actually means? - In the man
page it says:
"If enabled, a query is attempted without the forward clause if
it fails. The default is no."
With this set to 'yes' - if I fail all the forwarders, nothing gets
resolved (I was kind of expecting it to retry the query - with the roots? -
i.e. no forwarders?) - or does this not apply if you're trying to forward
"."?
Thanks for your time,
-Karl
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