3938. [func] Added quotas to be used in recursive resolvers
that are under high query load for names in zones
whose authoritative servers are nonresponsive or
are experiencing a denial of service attack.
- "fetches-per-server" limits the number of
simultaneous queries that can be sent to any
single authoritative server. The configured
value is a starting point; it is automatically
adjusted downward if the server is partially or
completely non-responsive. The algorithm used to
adjust the quota can be configured via the
"fetch-quota-params" option.
- "fetches-per-zone" limits the number of
simultaneous queries that can be sent for names
within a single domain. (Note: Unlike
"fetches-per-server", this value is not
self-tuning.)
- New stats counters have been added to count
queries spilled due to these quotas.
These options are not available by default;
use "configure --enable-fetchlimit" (or
--enable-developer) to include them in the build.
See the ARM for details of these options. [RT #37125]
3731. [func] Added a "no-case-compress" ACL, which causes
named to use case-insensitive compression
(disabling change #3645) for specified
clients. (This is useful when dealing
with broken client implementations that
use case-sensitive name comparisons,
rejecting responses that fail to match the
capitalization of the query that was sent.)
[RT #35300]
(cherry picked from commit 166341d554)
This incorporates the following changes, plus a new configure
option "--enable-rrl" to turn them on:
3575. [func] Changed the logging category for RRL events from
'queries' to 'query-errors'. [RT #33540]
3554. [bug] RRL failed to correctly rate-limit upward
referrals and failed to count dropped error
responses in the statistics. [RT #33225]
3545. [bug] RRL slip behavior was incorrect when set to 1.
[RT #33111]
3518. [bug] Increase the size of dns_rrl_key.s.rtype by one bit
so that all dns_rrl_rtype_t enum values fit regardless
of whether it is teated as signed or unsigned by
the compiler. [RT #32792]
3494. [func] DNS RRL: Blunt the impact of DNS reflection and
amplification attacks by rate-limiting substantially-
identical responses. To enable, use "configure
--enable-rrl". [RT #28130]
3316. [tuning] Improved locking performance when recursing.
[RT #28836]
3315. [tuning] Use multiple dispatch objects for sending upstream
queries; this can improve performance on busy
multiprocessor systems by reducing lock contention.
[RT #28605]
Add
- optional "recursive-only yes|no" to the response-policy statement
- optional max-policy-ttl to limit the lies that "recursive-only no"
can introduce into resolvers' caches
- test that queries with RD=0 are not rewritten by default
- performance smoke test
Change encoding of PASSTHRU action to "rpz-passthru".
(The old encoding is still accepted.)
Fix rt26180 assert botch in zone_findrdataset() in this branch
as well.
Fix missing signatures on NOERROR results despite RPZ hits
when there are signatures and the client asks for DNSSEC,
support for addzone/delzone feature (see change
#2930). Removed "new-zone-file" option, replaced
with "allow-new-zones (yes|no)". The new-zone-file
for each view is now created automatically, with
a filename generated from a hash of the view name.
It is no longer necessary to "include" the
new-zone-file in named.conf; this happens
automatically. Zones that were not added via
"rndc addzone" can no longer be removed with
"rndc delzone". [RT #19447]
allow dynamic addition and deletion of zones.
To enable this feature, specify a "new-zone-file"
option at the view or options level in named.conf.
Zone configuration information for the new zones
will be written into that file. To make the new
zones persist after a restart, "include" the file
into named.conf in the appropriate view. (Note:
This feature is not yet documented, and its syntax
is expected to change.) [RT #19447]
