Monitoring pfSense with Nagios Using SSH – part 3

Monitoring pfSense with Nagios Using SSH – part 3

Configuring the checks on Nagios XI This is the third and final part to monitoring pfSense with Nagios XI using SSH. If you missed either of the previous parts, I’ve included them below. Note: If you’re configuring this on Nagios Core, scroll down to the bottom of this page for the example commands.cfg and services.cfg files. Part 1: Setting up password-less SSH Part 2: Downloading and testing the checks Changelog 15Dec2017 – Originally posted 9May2018 – Added uptime and CPU…

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Monitoring pfSense with Nagios Using SSH – part 2

Monitoring pfSense with Nagios Using SSH – part 2

Downloading and testing the checks In the part 1, we setup password-less SSH. Now that we have a secure connection between the systems, we are quite a bit closer to securely running check commands using the SSH proxy on Nagios XI or the check_by_ssh on Nagios Core. Changelog 15Dec2017 – Originally posted 9May2018 – Added uptime and CPU temperature check as well as a Nagios Core example 11May2018 – Modified the check_pf_mem plugin 1June2018 – Added Nagios Core services.cfg and…

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Monitoring pfSense with Nagios Using SSH – part 1

Monitoring pfSense with Nagios Using SSH – part 1

Monitoring pfSense with Nagios XI or Core Using SSH Series This walkthrough will guide you through the process of monitoring your pfSense using SSH and Nagios. Though this was originally written with Nagios XI in mind, recent additions to this walkthrough have made the process far easier for those configuring it on Nagios Core. FWIW, the scripts could also be used with NRPE without issue, although I discuss why SSH is my preferred route below. The end of part 3…

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Nagios – ndo2db not running

Nagios – ndo2db not running

Your Nagios server was shutoff unexpectedly and now you see the “database backend” with a red exclamation in the web GUI. The only thing you can do is try to start the process, but it comes back with ndo2db is not running. Fortunately, the fix is pretty simple. Feel free to copy/paste the commands to avoid typos. Just make sure you omit the ‘#’ on each command otherwise the command won’t run. Assuming you have already tried restarting the ndo2db…

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Why Net Neutrality Is Vital For Entrepreneurs

Why Net Neutrality Is Vital For Entrepreneurs

The battle over net neutrality rages on and it has far-reaching implications beyond the US. Anyone who knows or follows me knows I am a huge fan of net neutrality. I’m not saying it is the only way to protect the free and open internet, but 1) it is one of the easiest, 2) it’s all we have, and 3) simple generally leads to less loopholes. For what it is worth, this isn’t a political discussion and I don’t intend…

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Configuring Quad9 on pfSense

Configuring Quad9 on pfSense

Quad9 is a DNS platform that adds several layers of security. It does this via standard DNS queries/responses.Basically, if a machine on your network queries a known bad hostname, the Quad9 DNS server responds by stating that domain does not exist (NX DOMAIN or non-existent domain). Quad9 also allows you to use DNS over TLS. If you would like a bit more info on Quad9 including some speed benchmarks against other DNS services, I would suggest an earlier article, Quad9 – First…

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Quad9 – First Thoughts & Benchmarks

Quad9 – First Thoughts & Benchmarks

Quad9 is the collaboration of IBM X-Force, PCH, and Global Cyber Alliance. It provides a DNS platform that combines high performance with security by blocking known malicious domains. At the time of this writing, Quad9 was using 19 threat feeds. I’m not going to get into the marketing speak because quite frankly, enough folks cover that well enough. Quad9 <- Main Site New “Quad9” DNS service blocks malicious domains for everyone <- Ars Technica Instead, I’ll provide the bare essentials…

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Sending pfSense logs to the DShield project

Sending pfSense logs to the DShield project

Changelog 02June2017 – Originally posted 28Nov2017  – Updated due to script changes What is DShield and why would I send them my logs? According to the SANS Internet Storm Center (ISC), “DShield provides a platform for users of firewalls to share intrusion information. DShield is a free and open service.” While DShield is often referred to generically as a “collaborative firewall log correlation system,” for all practical purposes, it is a bit of threat intelligence well before threat intelligence was…

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Testing SPF, DKIM, and DMARC

Testing SPF, DKIM, and DMARC

If you are interested in a step-by-step implementation of SPF, DKIM, and DMARC, there’s a post for that! It’s on this site as well and it will walk you through the entire process. https://www.linuxincluded.com/implementing-spf-dkim-and-dmarc/ Changelog 17Nov2017 – Originally posted 25Mar2018 – Added more SPF tests specifically for lookups Before you jump into testing SPF, DKIM, or DMARC, you need to verify where your authoritative DNS nameservers are. The easiest way to do this is by going to a Linux command…

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Implementing SPF, DKIM, and DMARC

Implementing SPF, DKIM, and DMARC

If you made it here, you might not be interested in the why’s of implementing the holy trinity – SPF, DKIM, and DMARC – of anti-email spoofing. However, if you’re still uncertain whether you should or shouldn’t, just do it! With the guide below, you’ll see it isn’t all that difficult and when used together, they provide great benefits like brand protection, reducing a phishing attack vector, less chance of your legitimate marketing emails ending up in spam, etc. It also…

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