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Ubuntu防火墙UFW常用命令

ufw是Ubuntu系列发行版自带的类似iptables的防火墙管理软件,底层也是基于netfilter的。

官方man手册http://manpages.ubuntu.com/manpages/trusty/man8/ufw.8.html

Usage:
    ufw COMMAND

Commands:
 enable enables the firewall
 disable disables the firewall
 default ARG set default policy
 logging LEVEL set logging to LEVEL
 allow ARGS add allow rule
 deny ARGS add deny rule
 reject ARGS add reject rule
 limit ARGS add limit rule
 delete RULE|NUM delete RULE
 insert NUM RULE insert RULE at NUM
 route RULE add route RULE
 route delete RULE|NUM delete route RULE
  route insert NUM RULE insert route RULE at NUM
  reload reload firewall
  reset reset firewall
  status show firewall status
  status numbered show firewall status as numbered list of RULES
  status verbose show verbose firewall status
  show ARG show firewall report
  version display version information

Application profile commands:
   app list list application profiles
   app info PROFILE show information on PROFILE
   app update PROFILE update PROFILE
   app default ARG set default application policy

一、基本用法

启用ufw

~]$ufw enable

禁用ufw

~]$ufw diable

查看防火墙状态及规则列表

~]$ufw status

重置防火墙

~]$ufw reset

切换防火墙日志级别

防火墙日志级别从low->full,日志开启后默认就是low级别,记录的日志量最少,内容包括和默认策略不匹配的包(带速率限制)以及匹配了规则的包,full是记录日志内容最多的级别。

~]$ufw logging on|off|LEVEL # level : low medium high full

设置防火墙默认策略

~]$ ufw default allow|deny|reject DIRECTION #DIRECTION: incoming outgoing  routed

添加防火墙规则

如果不指定package的方向(in/out),则默认为in。

#simple syntax
~]$ufw allow port
~]$ufw allow port/protocol
~]$ufw allow protocol #will check /etc/services for the port and protocol if specifying a service by name.
#fuller syntax
~]$ufw allow proto tcp [from ip/any] to ip/any port 80
~]$ufw deny 80/tcp #禁止其他设备连接到本机的tcp协议的80端口

删除防火墙规则

~]$ ufw delete number #以状态码删除规则
~]$ ufw delete allow 80/tcp #指定具体的规则删除

二、应用集成

ufw支持通过配置文件的方式进行应用集成,配置文件位于/etc/ufw/applications.d,可以使用命令ufw app list列出当前已经集成的应用名称。可以在前面的路径下面添加自定义服务,然后使用ufw allow <name>允许该服务,其中name是应用名。也可以使用完整的语法在最后加上应用名即可。配置示例:

[OpenSSH]
title=Secure shell server, an rshd replacement
description=OpenSSH is a free implementation of the Secure Shell protocol.
ports=22/tcp

作者:西伯利亚狼_ 链接:https://www.jianshu.com/p/451218449f54 来源:简书 著作权归作者所有。商业转载请联系作者获得授权,非商业转载请注明出处。