Networking Articles - jcutrer.com

WiFi6 certified UniFi6 Access Points are coming in 2020!

By JC | May 20, 2020 | Comments 0 Comment

Recent FCC ID applications by Ubiquiti Inc. (NYSE:UI) provides a hint that they are hard at work developing the next generation of WiFi6 UniFi Wireless Access Points. Want a sneak peek?

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MikroTik Tutorial: How to enable DNS over HTTPS (DoH)

By JC | May 17, 2020 | Comments 61 comments

In this MikroTik Tutorial I will show you how to configure DNS over HTTPS on your MikroTik router using either Cloudflare DNS servers or Google DNS servers.

The latest stable version of RouterOS 6.47 adds support for DNS over HTTPS or DoH. DoH is a protocol for performing remote DNS over HTTPS protocol. It is similar to DoT (DNS over TLS) but not exactly the same.

DNS Queries over HTTPS (DoH) is an accept IETF standard RFC8484.

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MikroTik Tutorial: show mac address table

By JC | October 15, 2019 | Comments 0 Comment

Here are the commands to show the mac address table on a MikroTik Router. In addition to using the command line to show the mac address table, this tutorial I will also show you how to search for a specific MAC address and filter the table to show mac addresses learned through a specific port. There are actually several commands that you should know, depending on how your router is configured.

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Mikrotik Tutorial: How to configure persistent logging

By JC | August 3, 2018 | Comments 6 comments

The default logging configuration on a MikroTik router is to only keep logs in memory. When the router reboots the logging history is erased. In this article I will show you the simple steps to configure persistent logging to disk.

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MikroTik Script: Router Rebooted Script

By JC | July 31, 2018 | Comments 12 comments

This is a useful little RouterOS script that will email you a nice report when your router reboots. The emailed report contains recent critical log events that may point you to the cause for the reboot. ie “router was rebooted without proper shutdown” or “out of memory condition was detected”.

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How to convert 48V PoE to 24V PoE

By JC | July 13, 2018 | Comments 1 comment

48V PoE (Power over Ethernet) is also known as 802.3af and 802.3at (PoE+) is the most common voltage. Some devices from manufacturers like Ubiquiti require 24V PoE. In this article I will highlight some of the inexpensive devices that you can use to convert 48V PoE to 24V PoE as well as

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MikroTik RouterOS Automation with NAPALM

By JC | February 5, 2018 | Comments 3 comments

In this tutorial, we will explore using the NAPALM python module to query data from a MikroTik Router.

Before we begin, you are expected to have python3 and pip installed as well as access to a MikroTik router running RouterOS. NAPALM will attempt to connect to the router on the default API port of 8728. You will need to enable the API service which is found in IP | Services using winbox

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