Hello,
I am running Unbound on FreeBSD, initially 10.3 and now 11, I tried the one on the FreeBSD Base, and now the Port (unbound-1.5.10) compiled with libevent support.
The problem I am experiencing is, from time to time unbound become utterly slow or do not resolve anything, or almost anything.
I did several changes on unbound.conf file and the problem now return about one time a day when just me (one user) is using Unbound as resolver. If a second user begin to using Unbound at same time it became slow as described until it have just one user again.
I opened a post on FreeBSD forum, what have more information:
https://forums.freebsd.org/threads/57493/
I need to add I also tried without success to disable PF firewall looking for any kind of firewall related issue. Also, this is my current unbound.conf:
# This file was generated by local-unbound-setup.
# Modifications will be overwritten.
server:
port: 53
username: unbound
directory: /usr/local/etc/unbound
chroot: /usr/local/etc/unbound
pidfile: /usr/local/etc/unbound/unbound.pid
auto-trust-anchor-file: /usr/local/etc/unbound/root.key
root-hints: "/usr/local/etc/unbound/root.hints"
logfile: log/unbound.log
log-time-ascii: yes
val-log-level: 2
do-ip6: no
do-tcp: yes
interface: 127.0.0.2
interface: 192.168.0.220
access-control: 127.0.0.2/16 allow
access-control: 192.168.0.0/24 allow
private-address: 192.168.0.0/24
private-domain: mydomain.com
qname-minimisation: yes
minimal-responses: no
hide-identity: yes
hide-version: yes
do-not-query-localhost: no
val-clean-additional: yes
harden-glue: yes
harden-dnssec-stripped: yes
unwanted-reply-threshold: 10000
prefetch: yes
prefetch-key: yes
cache-min-ttl: 3600
cache-max-ttl: 86400
num-threads: 4
msg-cache-slabs: 8
rrset-cache-slabs: 8
infra-cache-slabs: 8
key-cache-slabs: 8
rrset-cache-size: 100m
msg-cache-size: 50m
outgoing-range: 8192
num-queries-per-thread: 4096
so-rcvbuf: 1m
so-sndbuf: 1m
unblock-lan-zones: yes
insecure-lan-zones: yes
include: /usr/local/etc/unbound/conf.d/*.conf
#forward-zone:
# name: .
# forward-addr: 189.38.95.95
# forward-addr: 189.38.95.96
remote-control:
control-enable: yes
control-interface: /usr/local/etc/unbound/unbound.ctl
control-use-cert: no
Thank you!
Alex.