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Nagios plugins for console servers
Plugins are compiled executables or scripts that can be scheduled to be run in the Opengear to check the status of a connected host or service. The embedded NSCA and NRPE programs (as described in faq 279) then communicate this status to the upstream Nagios servers, which uses the results to monitor the current status of the distributed network.
Each console server is preconfigured with a selection of the checks that are part of the Nagios plugins package:
- check_tcp and check_udp are used to check open ports on network hosts
- check_ping is used to check network host availability
- check_nrpe is used to execute arbitrary plugins in other devices
Each console server is also preconfigured with two serial checks that are specific to Opengear:
- check_serial_signals is used to monitor the handshaking lines on the serial ports
- check_port_log is used to monitor the data logged for a serial port.
Additional plugins
Additional Nagios plugins (listed below) are available for the Opengear's advanced console server models (ACM/IM/IMG):
- check_apt
- check_by_ssh
- check_clamd
- check_dig
- check_dns
- check_dummy
- check_fping
- check_ftp
- check_game
- check_hpjd
- check_http
- check_imap
- check_jabber
- check_ldap
- check_load
- check_mrtg
- check_mrtgtraf
- check_nagios
- check_nntp
- check_nntps
- check_nt
- check_ntp
- check_nwstat
- check_overcr
- check_ping
- check_pop
- check_procs
- check_real
- check_simap
- check_smtp
- check_snmp
- check_spop
- check_ssh
- check_ssmtp
- check_swap
- check_tcp
- check_time
- check_udp
- check_ups
- check_users
These plugins from the Nagios plugins package can be downloaded from ftp.opengear.com. There are bash scripts which can also be downloaded and run, primarily check_log.sh.
- To configure additional checks the downloaded plugin program must be saved in the tftp addins directory on the USB flash and the downloaded text plugin file saved in /etc/config
- To enable these new additional checks you select Serial&Network: Network Port then Edit the Network Host to be monitored, and select New Checks. The additional check option will have been included in the updated Nagios Checks list, and you can again customize the arguments
If you need other plugins to be loaded into the advanced console server firmware, individual compiled programs may be generated using gcc for ARM ... and you can contact support@opengear.com if you need assistance.
Refer Chapter 10 in the User Manual for more details. You also can find more distributed Nagios information on:
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