I’m considering monkeying around with the firewall rules on my Synology router. If I mess that up, I’ll need to factory-reset the router. So I should probably back up the current configuration first. The Back Up Configuration button downloads a SynologyRouter_YYYYMMDD.dss file. What’s in it?

My router is a Synology RT2600ac; by default it runs dnsmasq. I recently replaced it with Synology’s full-fat DNS Service (it’s BIND); this broke DNS for my K3s cluster; here’s how I replaced that with ExternalDNS, making everything work again.

I recently experimented with using Tailscale Subnet Router as a VPN, to allow me to connect to my home network from the pub. It sorta works, but it’s been unreliable recently. I’m going to look at the VPN options that my Synology router gives me.

While messing around with my k3s cluster, I decided that I needed a DNS server. I tried the Synology DNS Server.