SSH防暴力破解的解决方法:
1、禁止root用户ssh登陆;
1.1、修改PermitRootLogin项:
[root@localhost ~]# vi /etc/ssh/sshd_config
[root@localhost ~]# grep Root /etc/ssh/sshd_config
PermitRootLogin no ### 将默认的 #PermitRootLogin yes 修改成这样的 ###
# the setting of "PermitRootLogin without-password".
[root@localhost ~]# vi /etc/ssh/sshd_config
[root@localhost ~]# grep Root /etc/ssh/sshd_config
PermitRootLogin no ### 将默认的 #PermitRootLogin yes 修改成这样的 ###
# the setting of "PermitRootLogin without-password".
1.2、重启sshd服务
Stopping sshd: [ OK ]
Starting sshd: [ OK ]
Stopping sshd: [ OK ]
Starting sshd: [ OK ]
2、修改ssh默认端口22;
2.1、将默认端口22修改为自定义的2020端口
[root@localhost ~]# vi /etc/ssh/sshd_config
[root@localhost ~]# grep Port /etc/ssh/sshd_config
Port 2020
#GatewayPorts no
[root@localhost ~]# vi /etc/ssh/sshd_config
[root@localhost ~]# grep Port /etc/ssh/sshd_config
Port 2020
#GatewayPorts no
2.2、在防火墙中加入2020端口的策略
[root@localhost ~]# vi /etc/sysconfig/iptables
[root@localhost ~]# grep 2020 /etc/sysconfig/iptables
-A INPUT -p tcp -m state --state NEW -m tcp --dport 2020 -j ACCEPT
[root@localhost ~]# vi /etc/sysconfig/iptables
[root@localhost ~]# grep 2020 /etc/sysconfig/iptables
-A INPUT -p tcp -m state --state NEW -m tcp --dport 2020 -j ACCEPT
2.3、重启防火墙策略
[root@localhost ~]# /etc/init.d/iptables restart
iptables: Setting chains to policy ACCEPT: nat filter [ OK ]
iptables: Flushing firewall rules: [ OK ]
iptables: Unloading modules: [ OK ]
iptables: Applying firewall rules: [ OK ]
[root@localhost ~]# /etc/init.d/iptables restart
iptables: Setting chains to policy ACCEPT: nat filter [ OK ]
iptables: Flushing firewall rules: [ OK ]
iptables: Unloading modules: [ OK ]
iptables: Applying firewall rules: [ OK ]
2.4、重启sshd服务
[root@localhost ~]# /etc/init.d/sshd restart
Stopping sshd: [ OK ]
Starting sshd: [ OK ]
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