chick
102 lines
2.2 KiB
Markdown
102 lines
2.2 KiB
Markdown
# fnOS EasyTier iptables 转发规则持久化
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适用于飞牛 fnOS / Debian 系 systemd 环境：开机后通过 `systemd timer` 延迟加载 iptables 转发规则，避免重启后规则丢失或网络/tun 设备未就绪导致规则加载失败。
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默认规则：
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- 开启 IPv4 转发：`/proc/sys/net/ipv4/ip_forward = 1`
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- 允许 `192.168.2.0/24` 与 `192.168.3.0/24` 双向转发
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- 允许 `tun0` 入站/出站 FORWARD
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- 开机延迟 `20s` 执行
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## 一键安装
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```bash
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curl -fsSL https://gitea.chickliu.fun/Hermes/fnos-iptables-forward/raw/branch/main/install.sh -o install.sh
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sudo bash install.sh install
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```
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或直接：
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```bash
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curl -fsSL https://gitea.chickliu.fun/Hermes/fnos-iptables-forward/raw/branch/main/install.sh | sudo bash
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```
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## 自定义网段 / 网卡 / 延迟
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```bash
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sudo LAN_A=192.168.2.0/24 LAN_B=192.168.3.0/24 TUN_IF=tun0 DELAY=20s bash install.sh install
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```
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## 查看状态
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```bash
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sudo bash install.sh status
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```
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会显示：
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- timer 状态
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- service 最近执行结果
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- `ip_forward`
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- `iptables -S FORWARD`
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## 卸载
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```bash
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sudo bash install.sh uninstall
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```
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卸载会移除：
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- `/home/scripts/iptables-forward.sh`
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- `/etc/systemd/system/iptables-forward.service`
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- `/etc/systemd/system/iptables-forward.timer`
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注意：卸载不会主动清空当前 iptables FORWARD 规则，避免误断网。如需清空请手动管理 iptables。
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## 安装后生成的文件
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### `/home/scripts/iptables-forward.sh`
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```bash
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#!/usr/bin/env bash
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set -Eeuo pipefail
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echo 1 > /proc/sys/net/ipv4/ip_forward
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iptables -F FORWARD
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iptables -P FORWARD ACCEPT
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iptables -A FORWARD -s 192.168.2.0/24 -d 192.168.3.0/24 -j ACCEPT
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iptables -A FORWARD -s 192.168.3.0/24 -d 192.168.2.0/24 -j ACCEPT
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iptables -A FORWARD -i tun0 -j ACCEPT
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iptables -A FORWARD -o tun0 -j ACCEPT
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```
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### `/etc/systemd/system/iptables-forward.service`
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```ini
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[Unit]
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Description=EasyTier iptables forward rules loader
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After=network-online.target
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Wants=network-online.target
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[Service]
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Type=oneshot
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ExecStart=/home/scripts/iptables-forward.sh
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User=root
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```
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### `/etc/systemd/system/iptables-forward.timer`
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```ini
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[Unit]
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Description=Delay load EasyTier iptables forward rules after boot
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[Timer]
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OnBootSec=20s
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Unit=iptables-forward.service
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[Install]
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WantedBy=timers.target
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```
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