ssh远程报错ssh_exchange_identification: read: Connection reset by peer

ssh远程登录报错：

[[email protected] ~]$ ssh     198.44.241.34

ssh_exchange_identification: read: Connection reset by peer

初步原因锁定：

1-服务器防火墙限定，

2-是否达到ssh的最大连接数，超过之后会服务器端会拒绝新的连接，直到有新的连接释放出来

3-/etc/hosts.allow和/etc/hosts.deny配置文件限定ip登录

解决方案：

1 firewall-cmd --list-all-zones

查看pubilic.xml和ssh.xml两个防火墙配置文件，是否放通指定ip

2 w 查看当天ssh远程连接数，是否达到最大连接数

#vim /etc/ssh/sshd_config

#LoginGraceTime 2m    参数表示登录验证时间

#MaxAuthTries 6    最大验证重试次数

#MaxSessions 10    最大远程连接数

3 vim /etc/hosts.all和vim /etc/hosts.deny查看限定的ip

[[email protected] ssh]# cat /etc/hosts.allow

#

# hosts.allowThis file contains access rules which are used to

#allow or deny connections to network services that

#either use the tcp_wrappers library or that have been

#started through a tcp_wrappers-enabled xinetd.

#

#See ‘man 5 hosts_options‘ and ‘man 5 hosts_access‘

#for information on rule syntax.

#See ‘man tcpd‘ for information on tcp_wrappers

sshd:122.10.70.66

4 查看ssh用户登录日志/var/log/secure

tail -20 /var/log/secure

or

#less /var/log/messages    查看最近系统操作信息

or

#last    查看最近登录日志

扩展：Linux命令之远程登录/无密码登录-ssh,ssh-keygen,ssh-copy-id

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