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networking

2022


Monitor a UPS with a Mikrotik router via SNMP

·706 words·4 mins
Mikrotik routers and switches serve as efficient network devices, but they know other tricks, too. Monitor your UPS with a Mikrotik device and query it via SNMP. 🔌

Build a Tailscale exit node with firewalld

·792 words·4 mins
Tailscale exit nodes allow you to route your traffic through nearly any system in your tailnet. Learn how to build an exit node using firewalld. 🕳️

2021


Secure Tailscale networks with firewalld

·648 words·4 mins
Tailscale provides a handy private network mesh across multiple devices but it needs security just like any other network. 🕵

2019


2017


2016


2015


GRE tunnels with systemd-networkd

·874 words·5 mins
Switching to systemd-networkd for managing your networking interfaces makes things quite a bit simpler over standard networking scripts or NetworkManager.

Understanding systemd’s predictable network device names

·1319 words·7 mins
I talked a bit about systemd’s network device name in my earlier post about systemd-networkd and bonding and I received some questions about how systemd rolls through the possible names of network devices to choose the final name.

HOWTO: Mikrotik OpenVPN server

·1081 words·6 mins

RB850Gx2 mikrotikMikrotik firewalls have been good to me over the years and they work well for multiple purposes. Creating an OpenVPN server on the device can allow you to connect into your local network when you’re on the road or protect your traffic when you’re using untrusted networks.

Although Miktrotik’s implementation isn’t terribly robust (TCP only, client cert auth is wonky), it works quite well for most users. I’ll walk you through the process from importing certificates through testing it out with a client.

2014


2013


Moving from OS X to Linux: Day One

·1418 words·7 mins
The thought of using Linux as a manager in a highly Windows- and Mac-centric corporate environment isn’t something to be taken lightly.

2012


One week with Android

·873 words·5 mins
After getting Android-envy at LinuxCon, I decided to push myself out of my comfort zone and ditch my iPhone 4 for a Samsung Galaxy S III.

Kerberos for haters

·686 words·4 mins
I’ll be the first one to admit that Kerberos drives me a little insane.

2011


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2009


2008