What kind of linux tunnels are there without encryption functions? What are the tunnels on linux IP-in-IP? What is a GRE tunnel: A GRE tunnel is a point-to-point connection, it can be considered one of the varieties of a VPN tunnel without encryption. Wireguard did not fit, it encrypts incoming data into the tunnel, which means the CPU / RAM loads more + besides, the ping is high in the first seconds. The TCP/UDP protocol is needed.
