防火墙配置示例

以下是一些常见的防火墙配置示例，帮助您更好地理解和应用防火墙规则。

示例 1：允许特定端口访问

iptables -A INPUT -p tcp --dport 80 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j ACCEPT

示例 2：禁止特定 IP 访问

iptables -A INPUT -s 192.168.1.100 -j DROP

示例 3：NAT 转发

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -A PREROUTING -i eth0 -p tcp --dport 80 -j DNAT --to-destination 192.168.1.100:80

防火墙配置示例

更多防火墙配置示例，请参考防火墙配置指南。

# Firewall Configuration Examples

Here are some common firewall configuration examples to help you better understand and apply firewall rules.

## Example 1: Allow Access to Specific Ports

```bash
iptables -A INPUT -p tcp --dport 80 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j ACCEPT

Example 2: Block Access from Specific IP

iptables -A INPUT -s 192.168.1.100 -j DROP

Example 3: NAT Forwarding

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -A PREROUTING -i eth0 -p tcp --dport 80 -j DNAT --to-destination 192.168.1.100:80

Firewall Configuration Example

For more firewall configuration examples, please refer to Firewall Configuration Guide.