Linux链接到ssh的时候可能报错：“ssh_exchange_identification: Connection closed by remote host”。
检查方法：文 章 源 自 note.t4x.orgByrd's Blog-https://note.t4x.org/error/ssh-exchange-identification-connection-closed-by-remote-host/
①：查看系统日志；文 章 源 自 note.t4x.orgByrd's Blog-https://note.t4x.org/error/ssh-exchange-identification-connection-closed-by-remote-host/
②：检查 /etc/hosts.deny 以及 /etc/hosts.allow 里面是否做了屏蔽；文 章 源 自 note.t4x.orgByrd's Blog-https://note.t4x.org/error/ssh-exchange-identification-connection-closed-by-remote-host/
③：删除用户目录的/.ssh/known_hosts测试一下；文 章 源 自 note.t4x.orgByrd's Blog-https://note.t4x.org/error/ssh-exchange-identification-connection-closed-by-remote-host/
④：sshd配置的MaxStartups限制太死，连接数不够。文 章 源 自 note.t4x.orgByrd's Blog-https://note.t4x.org/error/ssh-exchange-identification-connection-closed-by-remote-host/ 文 章 源 自 note.t4x.orgByrd's Blog-https://note.t4x.org/error/ssh-exchange-identification-connection-closed-by-remote-host/
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