Binary package “ptunnel-ng” in ubuntu jammy
Tunnel TCP connections over ICMP packets
ptunnel is an application that allows you to reliably tunnel TCP
connections to a remote host using ICMP echo request and reply
packets, commonly known as ping requests and replies. It acts as
a proxy and can handle sockets and secured identification.
.
Those features can be very handy when working in a closed networking
environment with firewalls and proxies.