It's generally more convoluted than the equivalent alternatives, with less features. You need a shared secret - you could use totp - or you could use vpn/ssh wi

It's generally more convoluted than the equivalent alternatives, with less features. You need a shared secret - you could use totp - or you could use vpn/ssh with key based auth - both offer authentication of/to both sides and encryption/confidentiality. Blocking all icmp traffic breaks tcp - so true "invisibility" isn't that grät either.