Which program to choose for organizing a proxy (vpn) on Linux?

Question

linux

Hello!
My first question, so don't criticize too much.
The task is this: there is a home network (a computer, a couple of laptops, a tablet, and phones) that go to the Internet through a Wi-Fi router. The router itself works through the SIM card of the mobile operator, because the IP is dynamic.
There is a rented server on Linux (root). You need to put something on this server to create a VPN in such a way that you can connect from the router using your login and password and all home network traffic goes through this VPN.
What is the best program to use for this on the server?
OpenVPN does not seem to be suitable, since it creates certificates, and the router will not understand this certificate.
The difficulty is that you need to redirect any traffic through the server, including p2p, ssh, etc.
What do you advise?

Answer 1

Try using IPSec

Answer 2

You need to dance on what the router supports, and not abstractly look for something. See the manual for your specific router model.
As for certificates - the format of certificates is standardized, so they can usually be used anywhere. If necessary, certificates can be converted from one representation to another, for example, using openssl.