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Networking

2024

Redirect local ports with firewalld

·645 words·4 mins
Redirecting local ports with iptables directly isn’t too difficult, but can we use firewalld to get the same result? 🧱

2023

2022

Monitor a UPS with a Mikrotik router via SNMP

·703 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

·788 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

·645 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

HOWTO: Mikrotik OpenVPN server

·1074 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.

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2011