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Ubuntu Linux系统下设置shorewall防火墙

添加时间:2010-1-4
    相关阅读: 网络 系统

  服务器采用Ubuntu作为操作系统,两块网卡,一块接外网(eth0),一块接内网(eth1)。采用shorewall作为防火墙。

    配置网卡:

    sudo vi /etc/network/interfaces

    Ubuntu下设置shorewall防火墙

    服务器采用Ubuntu作为操作系统,两块网卡,一块接外网(eth0),一块接内网(eth1)。采用shorewall作为防火墙。

    配置网卡:

 sudo vi /etc/network/interfaces
------------------------------------------------
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# This is a list of hotpluggable network interfaces.
# They will be activated automatically by the hotplug subsystem.
mapping hotplug
script grep
map eth0

# The primary network interface
iface eth0 inet static
address 192.168.2.250
netmask 255.255.255.0
network 192.168.2.0
broadcast 192.168.2.255
gateway 192.168.2.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 202.96.209.6

auto eth1
iface eth1 inet static
address 192.168.10.254
netmask 255.255.255.0
network 192.168.10.0
broadcast 192.168.10.255


    1、安装shorewall

    sudo apt-get install shorewall

    2、拷贝配置文件

    sudo cp /usr/share/shorewall/modules /etc/shorewall

    sudo cp /usr/share/doc/shorewall/default-config/policy /etc/shorewall/

    sudo cp /usr/share/doc/shorewall/default-config/nat /etc/shorewall/

    sudo cp /usr/share/doc/shorewall/default-config/zones /etc/shorewall/

    sudo cp /usr/share/doc/shorewall/default-config/maclist /etc/shorewall/

    sudo cp /usr/share/doc/shorewall/default-config/blacklist /etc/shorewall/

    sudo cp /usr/share/doc/shorewall/default-config/interfaces /etc/shorewall/interfaces

    sudo cp /usr/share/doc/shorewall/default-config/rules /etc/shorewall/rules

    sudo cp /usr/share/doc/shorewall/default-config/hosts /etc/shorewall/hosts

    sudo cp /usr/share/doc/shorewall/default-config/masq /etc/shorewall/masq

    3、配置网卡

    sudo vi /etc/shorewall/interfaces

    在倒数第二行,也就是在 “#LAST LINE —— ADD YOUR ENTRIES BEFORE THIS ONE —— DO NOT REMOVE” 这一行之后加上:

    net eth0 detect

    loc eth1 detect

    4、配置网络别名

    sudo vi /etc/shorewall/zones

    在倒数第二行,也就是在 “#LAST LINE —— ADD YOUR ENTRIES BEFORE THIS ONE —— DO NOT REMOVE” 这一行之后加上:

    net Net Internet

    loc Local Local Networks

    5、配置IP伪装,也就是透明代理

    sudo vi /etc/shorewall/masq

    在倒数第二行,也就是在 “#LAST LINE —— ADD YOUR ENTRIES BEFORE THIS ONE —— DO NOT REMOVE” 这一行之后加上:

    eth0 eth1

    6、配置策略

    sudo vi /etc/shorewall/policy

    在#LAST LINE —— DO NOT REMOVE这一行最后加上:

    loc net ACCEPT

    net all DROP info

    all all REJECT info

    7、配置防火墙规则

    sudo vi /etc/shorewall/rules

    在倒数第二行,也就是在 “#LAST LINE —— ADD YOUR ENTRIES BEFORE THIS ONE —— DO NOT REMOVE” 这一行后加上:

    #incoming traffic (由 internet 去 firewall)

    AllowSSH net fw

    AllowDNS net fw

    AllowWeb net fw

    AllowSMB net fw

    AllowNNTP net fw

    AllowNTP net fw

    AllowRdate net fw

    AllowSMTP net fw

    DropPing net fw

    #outgoing traffic (由 firewall 去 internet)

    AllowWeb fw net

    AllowDNS fw net

    AllowSMTP fw net

    AllowSMB fw net

    AllowSMTP fw net

    AllowNNTP fw net

    AllowNTP fw net

    AllowRdate fw net

    AllowSSH fw net

    #open special ports

    ACCEPT net fw tcp 9980

    8、修改 shorewall.conf 自动开启 IP 转发

    sudo gedit /etc/shorewall/shorewall.conf

    查找到:

    IP_FORWARDING=Keep

    修改为:

    IP_FORWARDING=On

    # 保存关闭文件

    9、修改 /etc/default/shorewall 自动运行防火墙

    sudo vi /etc/default/shorewall

    查找到:

    startup=0

    修改为:

    startup=1

    10、启动防火墙

    sudo shorewall start

    11、至此防火墙配置完成

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