NAT for use with OpenVPN

[Morgan Wesström]

> See my follow up message. It's the SNAT directive. The tutorial I was 
> looking at was
> 
> https://www.karlrupp.net/en/computer/nat_tutorial

Well, I'm too inexperienced with iptables to give you and advice here 
unfortunately.

> Definitely. I assume the way to test that would be to attempt to access 
> my router from the outside the same way I would when I log in from the 
> inside.

Yes, connect your phone with mobile data only (no WiFi) and no VPN and 
you can try to browse to the admin interface on your external ip. For a 
more thorough test you could install Termux which will give you a Linux 
terminal in your phone. It comes with a built-in package manager so you 
can install your favourite Linux tools. You can use it to install nmap 
which is the defacto port scanning tool to use. The man page will give 
you some examples of the syntax and it will scan for open ports. It 
should only find your 1194 port used by OpenVPN.

/Morgan