KexAlgorithms

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KexAlgorithms (Key Exchange Algorithms)

ssh -Q kex
ssh -Q kex SERVER
ssh -Q kex
diffie-hellman-group1-sha1
diffie-hellman-group14-sha1
diffie-hellman-group14-sha256
diffie-hellman-group16-sha512
diffie-hellman-group18-sha512
diffie-hellman-group-exchange-sha1
diffie-hellman-group-exchange-sha256
ecdh-sha2-nistp256
ecdh-sha2-nistp384
ecdh-sha2-nistp521
curve25519-sha256
curve25519-sha256@libssh.org
sntrup4591761x25519-sha512@tinyssh.org
ssh -Q kex SERVER
diffie-hellman-group1-sha1
diffie-hellman-group14-sha1
diffie-hellman-group14-sha256
diffie-hellman-group16-sha512
diffie-hellman-group18-sha512
diffie-hellman-group-exchange-sha1
diffie-hellman-group-exchange-sha256
ecdh-sha2-nistp256
ecdh-sha2-nistp384
ecdh-sha2-nistp521
curve25519-sha256
curve25519-sha256@libssh.org
sntrup4591761x25519-sha512@tinyssh.org



ssh -oKexAlgorithms=+diffie-hellman-group14-sha1 username@hotstname
ssh -oHostKeyAlgorithms=-ssh-rsa user@host
/etc/ssh/ssh_config
KexAlgorithms +diffie-hellman-group14-sha1

See also[edit]