This is a text-only version of the following page on https://raymii.org: --- Title : Nagios plugin to check an OCSP server Author : Remy van Elst Date : 06-05-2013 URL : https://raymii.org/s/software/Nagios_plugin_to_check_OCSP.html Format : Markdown/HTML --- This is a nagios plugin to check an OCSP server. It does so by having either a PEM encoded certificate in the code, and the PEM encoded certificate of the issuer in the code, or by using two given PEM files. This is sent to the OCSP server and the response is then parsed to give the correct nagios result. It is targeted at administrators who have their own OCSP and need to know when it is not working. This version has contributions from [Pali Sigurdsson][1].

Recently I removed all Google Ads from this site due to their invasive tracking, as well as Google Analytics. Please, if you found this content useful, consider a small donation using any of the options below:

I'm developing an open source monitoring app called Leaf Node Monitoring, for windows, linux & android. Go check it out!

Consider sponsoring me on Github. It means the world to me if you show your appreciation and you'll help pay the server costs.

You can also sponsor me by getting a Digital Ocean VPS. With this referral link you'll get $200 credit for 60 days. Spend $25 after your credit expires and I'll get $25!

#### Download [Download the plugin from my github][3] [Download the plugin from raymii.org][4] #### Usage `./check_ocsp.sh`: * `-H host_name` \- remote host to check * `-P port` \- port to use * `--noverify` \- Don't verify if certificate is valid * `--max-age 4800` \- alert if certificate is about to expire * `--cert filename` \- use this cert file instead of the hardcoded one * `--issuer filename.pem` \- use this issuer certificate instead of the hardcoded one * `--verbose` \- handy for troubleshooting, echos the exact openssl command used #### Installation This guide covers the steps needed for Ubuntu 10.04/12.04 and Debian 6. It should also work on other distro's, but make sure to modify the commands where needed (package installation for example). First make sure you have the required tools: apt-get install gawk grep bash sed wget curl openssl Place the script on the nagios host (I've placed it in _/etc/nagios/plugins/_ ): wget -O */etc/nagios/plugins/check_ocsp_hard.sh http://raymii.org/s/inc/downloads/check_ocsp_hard.sh Make sure that the script is executable: chmod +x /etc/nagios/plugins/check_ocsp_hard.sh Now test it: /etc/nagios/plugins/check_ocsp_hard.sh OK: OCSP up and running - status of certificate for raymii.org GOOD by OCSP: http://ocsp.comodoca.com/ #### Nagios config Here's some example nagios config: Lets create a command definition: define command{ command_name check_ocsp command_line /etc/nagios-plugins/check_ocsp.sh -H $USER1$ -p $USER2$ --cert $USER3$ --issuer $USER4$ } And a service check: define service { use generic-service host_name localhost service_description OCSP check of $OCSP for $DOMAIN contact nagiosadmin check_command check_ocsp!raymii.org!443!/etc/ssl/certs/raymiiorg.pem!/etc/ssl/certs/comodo.pem } Or if you use a hardcoded certificate: define command{ command_name check_ocsp_hard command_line /etc/nagios-plugins/check_ocsp.sh } define service { use generic-service host_name localhost service_description OCSP check of $OCSP for $DOMAIN with hardcoded certificate contact nagiosadmin check_command check_ocsp_hard } [1]: https://github.com/palli/ [2]: https://www.digitalocean.com/?refcode=7435ae6b8212 [3]: https://github.com/RaymiiOrg/nagios [4]: https://raymii.org/s/inc/downloads/check_ocsp.sh --- License: All the text on this website is free as in freedom unless stated otherwise. This means you can use it in any way you want, you can copy it, change it the way you like and republish it, as long as you release the (modified) content under the same license to give others the same freedoms you've got and place my name and a link to this site with the article as source. This site uses Google Analytics for statistics and Google Adwords for advertisements. You are tracked and Google knows everything about you. Use an adblocker like ublock-origin if you don't want it. All the code on this website is licensed under the GNU GPL v3 license unless already licensed under a license which does not allows this form of licensing or if another license is stated on that page / in that software: This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . Just to be clear, the information on this website is for meant for educational purposes and you use it at your own risk. I do not take responsibility if you screw something up. Use common sense, do not 'rm -rf /' as root for example. If you have any questions then do not hesitate to contact me. See https://raymii.org/s/static/About.html for details.