ssh_exchange_identification
(2015-06-05)
Seems like a terribly late date to still be messing around with clunkers like these, but oh well
Problem
ASA 5505 factory default, can't ssh in, ssh client gets error
ssh_exchange_identification: Connection closed by remote host
Solution
Generate rsa crypto keys:
conf t
crypto key generate rsa modulus 2048
end
wr mem