Key exchange method (KEX)
OpenSSH changelog
- OpenSSH 9.0 Aug 2022 Use the hybrid Streamlined NTRU Prime + x25519 key exchange method by default
- OpenSSH 8.5 03 March 2021 update/replace the experimental post-quantum hybrid key exchange method
- Added curve25519-sha256@libssh.org key exchange
ssh -V OpenSSH_8.2p1 Ubuntu-4ubuntu0.2, OpenSSL 1.1.1f 31 Mar 2020 ssh -o PreferredAuthentications=keyboard-interactive -o PubkeyAuthentication=no [email protected] Unable to negotiate with 10.10.10.2 port 22: no matching key exchange method found. Their offer: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 123.123.123.123 ssh_dispatch_run_fatal: Connection to 123.123.123.123 port 22: Invalid key length
Cisco IOS
KEX Algorithms:diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1
Related terms
KexAlgorithmsdirective
See also
- KEX, KexAlgorithms, Diffie–Hellman, PSK, Elliptic-curve Diffie–Hellman (ECDH)
- Public key cryptography,
private key,public key,key length,ssh-keygen,ssh-keyscan, Root certificate, KEX, Generate a key - SSH:
ssh, TLS,.ppk, .pem, .crt, .pub, ED25519, Key exchange method (KEX), public key, private key,ssh -Q kex,IAMUserSSHKeys,known_hosts, ssh tunnel, Dropbear - TLS, mTLS: OpenSSL, LibreSSL, BoringSSL, WolfSSL, X.509,
.pem, SNI, CT, OCSP, Mbed TLS, ALPN,your connection is not private, SSL Certificate Checker, Wildcard certificate, JA3 fingerprint, sslcan, TLS inspection
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