As you can see, setting up such tunnels does not requires advanced skills, especially with the recent Linux distributions which come with pre-installed and pre-configured ssh servers.
With a little more skills, it is possible to tunnel just about everything into everything. For example, it is possible to tunnel PPP into HTTP, providing a full IP-stack tunnelling, including ICMP (ping...), DNS and servers (backward tunnels).
With a little more skills, it is possible to tunnel just about everything into everything. For example, it is possible to tunnel PPP into HTTP, providing a full IP-stack tunnelling, including ICMP (ping...), DNS and servers (backward tunnels).