If you aren't trying for tetrapod, we probably need to add a proxy...

      $ ssh-keygen -lf <(ssh-keyscan localhost 2>/dev/null)
        3072 SHA256:7F27t6Nnk92bkofW1Oz9eEAdflQdCH/0a0OZXtFQhus localhost (RSA)
         256 SHA256:ayv1wU2Rid5U3vwC2OvP7v1hZmr4gjM29//CBz0cVVA localhost (ECDSA)
         256 SHA256:1qVK28JTWBhpuH3Q5Vz8UGnOT0Fsz8/nILysAEzmEQU localhost (ED25519)