Identifying a buggy SFTP server found at an archaeological dig

[Peter Gutmann <pgut001%cs.auckland.ac.nz@localhost>]

I've had a report of someone having problems connecting to something that
identifies itself with the totally useless "SSH-2.0-FTP Server ready".  As
soon as it sees a SSH_MSG_KEY_DH_GEX_REQUEST it disconnects, wanting to see a
SSH_MSG_KEX_DH_GEX_REQUEST_OLD from around 20 years ago instead (and yes, it
also does blowfish, 3des, rsa1024-sha1, hmac-ripemd160, and a bunch of other
stuff).

Does anyone know what this is?  And it wasn't really found at an
archaeological dig, it's a live production server in active use.

Peter.