Please implement VPN over ICMP (ICMP Tunnel)
(it can be very useful in some countries with a totalitarian regime)))
Absolutely correct. ICMP is commonly filtered and would not be a reliable method of connectivity.Hello
From high-level point of view, there would be little difference between udp. And high stream of large icmp packets would be a red flag on it's own.
Furthermore, some networks / routers perform icmp "optimisation" / rate limiting, which would result in high packet loss.
So far from stealthy.
Ps: if stealth is needed, hide in plain sight -> ssl based vpn, as almost everything is using it nowadays.