インストール

# cd /usr/ports/dns/unbound
# make install clean

設定

# vi /usr/local/etc/unbound/unbound.conf

server:
	verbosity: 1
	hide-identity: yes
	hide-version: yes
	interface: 192.168.1.201
	do-ip6: no
	access-control: 127.0.0.0/8 allow
	access-control: 192.168.1.0/24 allow
	local-zone: "1.168.192.in-addr.arpa." transparent
stub-zone:
	name: "example.com."
	stub-addr: 192.168.1.200
stub-zone:
	name: "1.168.192.in-addr.arpa."
	stub-addr: 192.168.1.200

# unbound-checkconf /usr/local/etc/unbound/unbound.conf
unbound-checkconf: no errors in /usr/local/etc/unbound/unbound.conf

# printf '\n# unbound\nunbound_enable="YES"\n' >> /etc/rc.conf

起動

# /usr/local/etc/rc.d/unbound start