服务器发送了一个意外的数据包。received:3,expected:20

  sre

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用xshell5 ssh连接ubuntu 20.04 lts报错

received:3,expected:20

解决方法:
/etc/ssh/sshd_config最后增加以下一行

KexAlgorithms curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group14-sha1

重启sshd服务或者重载服务配置文件

systemctl reload sshd

systemctl restart sshd

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