How to access the server (router) network in a vacuum from outside?

Question

Network administration

I create a plan for: anonymizing my traffic through another network that does not have an external ip.
I propose to make a list as in action movies and Batman.
Equipment:
1. Local network #1 with server and computers (own network) with external ip.
2. LAN #2 with a ton of routers (coverage extenders) and computers, (foreign network) in a vacuum. This network has its own, trusted computer and a free link to the local area.
3. A pair of routers (asus rt n10), and dlink is the simplest (with 2 lans and 1 van, I don't think that there is at least a port forwarding setting), both can be thrown into enemy territory.
What you need:
Get access to local network #2 from outside and drive traffic through it.
That is: raise a vpn server on the local network without an external ip address.

Answer 1

First, set up a VPN server where there is an external IP. You connect to it under VPN from a network where there is no external IP. Then you connect to this VPN over the network. After that, you are all on the same network and the easiest thing left is to set up Internet access through another computer as you wanted. The task was reduced to a typical one. And so that the created VPN network does not fall apart, you need to tweak the routing table a little more.
In general, the topic looks as if a stupid and negligent worker wants to poke a worker's Internet.