Bitvise Tunnelier
Login SSH by Bitvise Tunnelier and got the error:
The SSH session has terminated with error. Reason: Error class: LocalSshDisconn, code: KeyExchangeFailed, message: FlowSshTransport: no mutually supported key exchange algorithm. Local list: diffie-hellman-group14-sha1,diffie-hellman-group1-sha1. Remote list: Curve25519,Curve25519@libssh,ECDH/nistp256,ECDH/nistp384,ECDH/nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256.
You must change key exchange:
Tick almost required algorithms saw in error message :
Curve25519,Curve25519@libssh,ECDH/nistp256,ECDH/nistp384,ECDH/nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256
Click OK. Done, now we can login SSH successfully.
Putty 0.63
Similarly, we will get the error by using Putty:
--------------------------- PuTTY Fatal Error --------------------------- Couldn't agree a key exchange algorithm (available: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256) --------------------------- OK ---------------------------
You should update Putty 0.74
Download for windows 64bits: https://the.earth.li/~sgtatham/putty/0.74/w64/putty.exe
