[teraflop]

TLS with a NULL cipher does, in fact, sign every message. (effectively)

[Evidlo]

Does ssh or telnet have a similar feature? Transmit in plaintext but prevent others from tampering with my box?

[Evidlo]

Apparently this is what ipsec is for, but it looks like the Wiznet device they're using doesn't have support in its IP stack.

https://www.geeksforgeeks.org/computer-network-ip-security-i...