Remote connection via ssh to a piece of iron?

Question

linux

Hello. There is a piece of iron with Linux, which has a SIM card with gsm (obtained for NAT)
There is a server with a dedicated IP.
I need to connect from my computer via ssh to this piece of iron (for example, to correct or see something). How can this be organized? (As I understand it, you can somehow make the server an intermediary)
I understand Linux very superficially.
Solution: rus-linux.net/MyLDP/sec/reverse-SSH-tunnel.html

Answer 1

From simple, but not free.
1. Take the cheapest VPS.
2. On the piece of hardware, do autossh to the VPS
3. On the client, either connect to a specific external port of the VPS, or simply log in and connect to the local port via ssh
4. Use the piece of iron
Google Reverse ssh tunnel
PS read the question carefully. You don't need a VPS, a reverse tunnel to your server is enough. On the server you will connect through localhost