使用ssh连接报错:Key exchange failed. No compatible key exchange method.
Tags: Key exchange failedLinuxOSssh连接问题
现象
用SecureCRT 6.6.1连接报错:
Key exchange failed.
No compatible key exchange method. The server supports these methods: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256
No compatible hostkey. The server supports these methods: rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
用Xshell 4连接报错:
解决
在/etc/ssh/sshd_config
文件中添加
1 2 3 4 5 6 7 8 | cat >> /etc/ssh/sshd_config <<"EOF" KexAlgorithms curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 EOF -- 或 cat >> /etc/ssh/sshd_config <<"EOF" KexAlgorithms +curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519,curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256 EOF |
保存后,然后重启ssh服务