Enable DNSSEC for unbound resolver
Retrieve the root KSK as trust-anchor and set it's permissions:
# unbound-anchor -a /etc/unbound/root.key # chown unbound.unbound /etc/unbound/root.key
Configure unbound '/etc/unbound/unbound.conf':
auto-trust-anchor-file "/etc/unbound/root.key"
Reload the new configuration:
# service unbound reload
Validation
dig sigok.verteiltesysteme.net @127.0.0.1
(should return A record)dig sigfail.verteiltesysteme.net @127.0.0.1
(should return SERVFAIL)