linux中如何禁止指定的ip访问呢?
比如被别人暴力破解,被别人使用不同的密码尝试登录:
所以我想直接禁用这些ip的访问.怎么办呢?
解决方案:修改配置文件/etc/hosts.deny
把要禁止ssh访问的ip都放在/etc/hosts.deny 中:
配置文件中有ip 117.136.38.47.
那么当这个ip尝试ssh登陆时,就会:
直接就拒绝登录了,都不会校验用户名和密码.
配置文件/etc/hosts.deny 内容:
Html代码 
- #
- # hosts.deny This file contains access rules which are used to
- # deny connections to network services that either use
- # the tcp_wrappers library or that have been
- # started through a tcp_wrappers-enabled xinetd.
- #
- # The rules in this file can also be set up in
- # /etc/hosts.allow with a 'deny' option instead.
- #
- # See 'man 5 hosts_options' and 'man 5 hosts_access'
- # for information on rule syntax.
- # See 'man tcpd' for information on tcp_wrappers
- #
- sshd:121.42.0.15
- sshd:121.42.0.17
- sshd:121.42.0.19
- sshd:121.42.0.30
- sshd:121.42.0.31
- sshd:121.42.0.36
- sshd:121.15.151.181
使用# 可以注释
也支持ip 局部匹配:
参考:解决阿里云主机受到攻击的问题2:
http://hw1287789687.iteye.com/blog/2269701