name : unbound-anchor.timer [Unit] Description=daily update of the root trust anchor for DNSSEC Documentation=man:unbound-anchor(8) [Timer] # Current DNSKEY TTL in root zone is 172800 seconds, i.e. 172800/60/60/24 = 2 days. # It means that unboud-anchor should be run at least once a day. OnCalendar=daily Persistent=true AccuracySec=24h [Install] WantedBy=timers.target