openwrt 安装iptables

要在 OpenWrt 上安装 iptables，可以使用以下命令：

opkg update
opkg install iptables

这将更新软件包列表并安装 iptables。安装完成后，可以使用以下命令来检查 iptables 是否已经安装成功：

iptables --version

如果成功安装，将会显示 iptables 的版本信息。

相关问题

openwrt iptables

OpenWrt is a Linux-based firmware for routers that provides a wide range of network features, including firewall capabilities using iptables. iptables is a command-line tool that allows you to configure firewall rules in Linux.

To configure iptables on OpenWrt, you can use the following steps:

1. Log in to your OpenWrt router using SSH or the LuCI web interface.

2. Navigate to the Firewall section in the web interface or use the command-line tool to create firewall rules.

3. Create a new firewall zone that defines the rules for the traffic to be allowed or blocked. For example, you can create a "wan" zone for incoming traffic from the Internet, and a "lan" zone for traffic between devices in your local network.

4. Add rules to the firewall zone using the iptables syntax. For example, you can allow incoming SSH traffic from the Internet to a specific device in your local network using the following command:

iptables -A zone_wan_input -p tcp --dport 22 -d 192.168.1.100 -j ACCEPT

This rule allows incoming TCP traffic to port 22 (SSH) on the device with IP address 192.168.1.100 in the "lan" zone.

5. Save the firewall rules to the OpenWrt configuration file to make them persistent across reboots:

/etc/init.d/firewall save

6. Restart the firewall service to apply the changes:

/etc/init.d/firewall restart

These are just some examples of how to configure iptables on OpenWrt. For more information and advanced configuration options, refer to the OpenWrt documentation or consult with a network administrator.

iptables拦截域名_openwrt路由器使用iptables进行域名过滤

好的，针对您的问题，我可以给出以下回答：

在 OpenWrt 路由器上使用 iptables 进行域名过滤需要进行以下步骤：

1. 安装 dnsmasq 和 iptables-mod-ipopt 软件包：

opkg update
opkg install dnsmasq iptables-mod-ipopt

2. 配置 dnsmasq，将需要过滤的域名解析到一个不存在的 IP 地址上，比如 0.0.0.0：

vi /etc/dnsmasq.conf

在 dnsmasq.conf 中添加以下内容：

address=/example.com/0.0.0.0

其中 example.com 是需要过滤的域名。

3. 配置 iptables 规则，将被解析到 0.0.0.0 的流量进行拦截：

iptables -I FORWARD -p tcp -d 0.0.0.0 -j REJECT
iptables -I FORWARD -p udp -d 0.0.0.0 -j REJECT

4. 保存 iptables 规则：

/etc/init.d/firewall save

5. 重启 dnsmasq 和 iptables 服务：

/etc/init.d/dnsmasq restart
/etc/init.d/firewall restart

这样，当路由器解析到需要过滤的域名时，将会被解析到一个不存在的 IP 地址上，然后被 iptables 规则拦截，从而实现域名过滤的效果。