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 The following key-exchange method(s) are supported but not currently allowed for this session: 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,curve25519-sha256 Key-exchange methods can be turned on in the Session Options dialog in the
解决办法：
1、SecureCRT 8+版本增加了对curve25519-sha256密钥交换算法的支持
2、勾选如下截图
