Identifying a buggy SFTP server found at an archaeological dig

I've had a report of someone having problems connecting to something that=
=0Aidentifies itself with the totally useless "SSH-2.0-FTP Server ready".  =
As=0Asoon as it sees a SSH_MSG_KEY_DH_GEX_REQUEST it disconnects, wanting t=
o see a=0ASSH_MSG_KEX_DH_GEX_REQUEST_OLD from around 20 years ago instead (=
and yes, it=0Aalso does blowfish, 3des, rsa1024-sha1, hmac-ripemd160, and a=
 bunch of other=0Astuff).=0A=0ADoes anyone know what this is?  And it wasn'=
t really found at an=0Aarchaeological dig, it's a live production server in=
 active use.=0A=0APeter.=0A