服务器改了密码，试过密码多次后出现：

ssh_exchange_identification: read: Connection reset by peer

可以通过ssh -v查看连接时详情

OpenSSH_6.6.1, OpenSSL 1.0.1k-fips 8 Jan 2015

debug1: Reading configuration data /etc/ssh/ssh_config

debug1: /etc/ssh/ssh_config line 56: Applying options for *

debug1: Connecting to xxx [xx] port 22.

debug1: Connection established.

debug1: identity file /home/yanue/.ssh/id_rsa type -1

debug1: identity file /home/yanue/.ssh/id_rsa-cert type -1

debug1: identity file /home/yanue/.ssh/id_dsa type -1

debug1: identity file /home/yanue/.ssh/id_dsa-cert type -1

debug1: identity file /home/yanue/.ssh/id_ecdsa type -1

debug1: identity file /home/yanue/.ssh/id_ecdsa-cert type -1

debug1: identity file /home/yanue/.ssh/id_ed25519 type -1

debug1: identity file /home/yanue/.ssh/id_ed25519-cert type -1

........

最后找打解决方法：

vi /etc/hosts.allow

追加：

sshd: ALL

重启ssh就ok了

service sshd restart