plugin Nagios ICMP RTT wildcard RFC1122 SSH whitelist SSH2 OpenSSH NRPE IMAPS IMAP SMTPS timeframe setup SSL TLS plugins HTTPS OIDs OID MIB SNMP MIBs NSclient hostname Perl metadata sparta naginet URLs hostnames PostgreSQL MySQL IPv4 online ithaca Nagios CGIs PHP screenshot servicegroup hostgroup username dropdown clickable popups webserver acknowledgement programatically NDOUtils screenful Timeperiods addon CGI PNG GD2 POSIX GitHub corsica BGP OSPF failover Boutell hostgroups virtualization backend mailserver usernames nameservers NagVis internet coords CMDB DNS IP Chacon's changeset Nagiostats precached config NSCA NRPE's misconfigured HTTPD Debian Sourceforge MRTG frontend NagiosGraph pre Nagiosgraph RSS