If you have double-NAT, you might think at first you won’t be able to run a tunnel, but using a cronjob with curl, dynamic DNS in your generic router, or specifically DDNS in OpenWrt, you can solve this problem effortlessly!
This is a quick guide on how to set up Namecheap Dynamic DNS on your FRITZ!Box.
You might be running an OpenVPN server and found that your IPv6 clients get their IP leaked. I have a quick fix! The problem If your client machine has IPv4 only, you won't notice any problems. But if your client machine has IPv6, and your OpenVPN server is IPv4 only, [...]