If you've setup Monit according one of Falko's howto's: http://www.howtoforge.com/server_monitoring_monit_munin or http://www.howtoforge.com/server_monitoring_with_munin_monit_debian_etch you're able to use monit to monitor the following processes: proftpd, sshd, mysql, apache & postfix If you add some extra lines to your /etc/monit/monitrc you're also able to monitor: bind9, Courier pop3, Courier pop3-SSL & Courier-imap. Lines to be added: check process bind9 with pidfile /var/lib/named/var/run/bind/run/named.pid group bind start program = "/etc/init.d/bind9 start" stop program = "/etc/init.d/bind9 stop" if failed port 53 then restart if 5 restarts within 5 cycles then timeout check process pop3 with pidfile /var/run/courier/pop3d.pid group mail start program = "/etc/init.d/courier-pop start" stop program = "/etc/init.d/courier-pop stop" if failed port 110 then restart if 5 restarts within 5 cycles then timeout check process pop3-ssl with pidfile /var/run/courier/pop3d-ssl.pid group mail start program = "/etc/init.d/courier-pop-ssl start" stop program = "/etc/init.d/courier-pop-ssl stop" if failed port 995 then restart if 5 restarts within 5 cycles then timeout check process imap with pidfile /var/run/courier/imapd.pid group mail start program = "/etc/init.d/courier-imap start" stop program = "/etc/init.d/courier-imap stop" if failed port 143 then restart if 5 restarts within 5 cycles then timeout After adding these extra lines do not forget to restart monit with: /etc/init.d/monit restart
