notify_rc restart_firewall

I'm trying to work out why today the syslog has many rc_service entries such as this: May 6 09:35:01 rc_service: amas_lib 368:notify_rc restart_firewall May 6 09:35:02 nat: apply nat rules (/tmp/nat_rules_eth0_eth0) May 6 10:19:37 rc_service: amas_lib 12463:notify_rc restart_firewall May 6...