linux ip白名单

配置文件:/etc/hosts.allow

/etc/hosts.deny


# hosts.allow   This 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:210.192.100.

注意:ip后面不能缺少句点

设置黑名单

黑名单的含义就是不允许黑名单上的ip地址对当前服务器进行访问(这里要求Chain INPUT(policy ACCEPT))

iptables -A INPUT -p tcp -s 192.168.1.2 -j DROP

设置拒绝所有ip访问(慎用)
防火墙命令的执行是有先后顺序的,在设置好白名单,留好后路之后,再执行该命令,除了白名单的ip,拒绝其它所有ip访问

iptables -A INPUT -p tcp -j DROP

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