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Add: [document/level-2] redirect traffic
https: //github.com/XTLS/XTLS.github.io/pull/79 Co-Authored-By: Zzz <28607089+Zzz3m@users.noreply.github.com>
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JimhHan
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[[透明代理]通过gid规避Xray流量](./iptables_gid.md) by <img src="https://avatars2.githubusercontent.com/u/57820613?s=32" width="32px" height="32px" alt="a"/> [@kirin](https://github.com/kirin10000)</font>
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在iptables/nftables实现的透明代理中，一种新的规避Xray流量的方式。
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[通过Xray将特定的流量指向特定出口，实现全局路由“分流”](./redirect.md) by <img src="https://avatars.githubusercontent.com/u/28607089?s=460" width="32px" height="32px" alt="a"/> [@Zzz3m](https://github.com/Zzz3m)</font>
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将Xray玩出花:基于 fwmark 或 sendThrough 方式实现“分流”。
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# 将特定流量指向特定出口
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通过 Xray 将特定的流量指向特定出口，实现全局路由“分流”
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## 前言
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之前在网络上看到许多代理或者 VPN 会接管全局路由，如果与 Xray 同时安装，会导致 Xray 失效。参考了网络上许多教程，及时分流，也是通过维护一张或者多张 CIDR
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路由表来实现的。这种情况下并不优雅，如果我想可以任意替换，实现按需分流，那有没有更好的办法呢？有！
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通过 fwmark 或 Xray 的 sendThrough，再简单配合路由表功能即可实现：
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1. Xray 可设置指定的 Tag、域名等走指定接口。如果您的接口是双栈的，可以指定 IPV4 或者 IPV6
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2. 其余用户则走原 IPV4 或者 IPV6
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具体设置如下（以 Debian10 为例）：
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## 1、安装代理或者 VPN 软件（例如 Wireguard、IPsec 等）
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根据不同系统和不同软件，请参考官方安装方法
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## 2、编辑 VPN 配置文件（以 WireGuard 为例）
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原始文件：
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<Tabs title="if-config">
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<Tab title="fwmark">
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```ini
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[Interface]
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PrivateKey = xxxxxxxxxxxxxxxxxxxx
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Address = "your wg0 v4 address"
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Address = "your wg0 v6 address"
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DNS = 8.8.8.8
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MTU = 1280
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[Peer]
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PublicKey = xxxxxxxxxxxxxxxxxxxxx
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AllowedIPs = ::/0
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AllowedIPs = 0.0.0.0/0
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Endpoint = "ip:port"
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```
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在 `[Interface]` 下添加如下命令：
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```ini
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Table = off
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PostUP = ip -4 rule add fwmark <mark> lookup <table>
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PostUP = ip -4 route add default dev <接口名称> table <table>
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PostUP = ip -4 rule add table main suppress_prefixlength 0
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PostUP = ip -6 rule add fwmark <mark> lookup <table>
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PostUP = ip -6 rule add not fwmark <table> table <table>
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PostUP = ip -6 route add ::/0 dev <接口名称> table <table>
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PostUP = ip -6 rule add table main suppress_prefixlength 0
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PostDown = ip -4 rule delete fwmark <mark> lookup <table>
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PostDown = ip -4 rule delete table main suppress_prefixlength 0
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PostDown = ip -6 rule delete fwmark <mark> lookup <table>
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PostDown = ip -6 rule delete not fwmark <table> table <table>
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PostDown = ip -6 rule delete table main suppress_prefixlength 0
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```
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::: tip
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- 此命令表示 IPv4 中 fwmark 为 `<mark>`，IPv6 中 fwmark 为`<mark>`，::/0 全局 v6 走 WireGuard
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- 可根据自己需求增删命令，mark 值要与 Xray-core 中设置为相同，table 值自定
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- 如果不支持配置文件，可以在系统中修改路由表
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:::
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</Tab>
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<Tab title="sendThrough">
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```ini
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[Interface]
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PrivateKey = xxxxxxxxxxxxxxxxxxxx
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Address = "your wg0 v4 address"
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Address = "your wg0 v6 address"
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DNS = 8.8.8.8
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MTU = 1280
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[Peer]
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PublicKey = xxxxxxxxxxxxxxxxxxxxx
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AllowedIPs = ::/0
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AllowedIPs = 0.0.0.0/0
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Endpoint = "ip:port"
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```
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在 `[Interface]` 下添加如下命令：
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```ini
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Table = off
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PostUP = ip -4 rule add from "your wg0 v4 address" lookup <table>
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PostUP = ip -4 route add default dev wg0 table <table>
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PostUP = ip -4 rule add table main suppress_prefixlength 0
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PostUP = ip -6 rule add not fwmark <table> table <table>
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PostUP = ip -6 route add ::/0 dev wg0 table <table>
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PostUP = ip -6 rule add table main suppress_prefixlength 0
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PostDown = ip -4 rule delete from "your wg0 v4 address" lookup <table>
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PostDown = ip -4 rule delete table main suppress_prefixlength 0
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PostDown = ip -6 rule delete not fwmark <table> table <table>
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PostDown = ip -6 rule delete table main suppress_prefixlength 0
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```
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::: tip
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- 此命令表示 IPV4 中来自 `your wg0 v4 address` 地址的走 WireGuard，IPv6 中::/0 全局 v6 走 WireGuard）
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- 可根据自己需求增删命令，实现 v6 分流，也可以与 fwmark 融合
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- 如果不支持配置文件，可以在系统中修改路由表
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:::
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</Tab>
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</Tabs>
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保存
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可顺手安装
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```bash
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apt install openresolv
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```
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## 3、启用 WireGuard 网络接口
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加载内核模块
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```bash
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modprobe wireguard
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```
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检查 WG 模块加载是否正常
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```bash
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lsmod | grep wireguard
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```
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## 4、Xray-core 配置文件修改
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<Tabs title="xray-config">
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<Tab title="fwmark">
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```json
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{
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"api": {
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"services": [
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"HandlerService",
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"LoggerService",
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"StatsService"
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],
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"tag": "api"
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},
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"inbounds": [
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{
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"listen": "127.0.0.1",
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"port": <port>,
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"protocol": "dokodemo-door",
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"settings": {
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"address": "127.0.0.1"
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},
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"tag": "api"
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}
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],
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"outbounds": [
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{
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"protocol": "freedom",
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"settings": {
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"domainStrategy": "UseIPv6"
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//设置默认用户走指定方式”UseIPv6”或者”UseIPv4”
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}
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},
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{
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"protocol": "freedom",
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"tag": "wg0",
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"streamSettings": {
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"sockopt": {
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"mark": <mark>
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}
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},
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"settings": {
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"domainStrategy": "UseIPv6"
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}
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//设置fwmark为<mark>的用户走指定方式”UseIPv6””UseIPv4”
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},
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{
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"protocol": "blackhole",
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"settings": {},
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"tag": "blocked"
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}
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],
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"policy": {
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"system": {
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"statsInboundDownlink": true,
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"statsInboundUplink": true
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}
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},
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"routing": {
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"rules": [
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{
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"inboundTag": [
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"api"
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],
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"outboundTag": "api",
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"type": "field"
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},
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{
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"type": "field",
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"outboundTag": "wg0",
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"inboundTag": [
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"<inboundTag>"
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//需要之前在inbound中指定好Tag，我这里是api生成的,还可以添加域名等等
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]
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},
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{
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"outboundTag": "blocked",
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"protocol": [
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"bittorrent"
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],
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"type": "field"
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}
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]
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},
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"stats": {}
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}
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```
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</Tab>
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<Tab title="sendThrough">
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```json
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{
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"api": {
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"services": [
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"HandlerService",
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"LoggerService",
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"StatsService"
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],
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"tag": "api"
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},
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"inbounds": [
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{
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"listen": "127.0.0.1",
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"port": <port>,
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"protocol": "dokodemo-door",
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"settings": {
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"address": "127.0.0.1"
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},
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"tag": "api"
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}
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],
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"outbounds": [
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{
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"protocol": "freedom",
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"settings": {
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"domainStrategy": "UseIPv4"
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}
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//修改此处，可v4或者v6
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},
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{
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"tag": "wg0",
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"protocol": "freedom",
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"sendThrough": "your wg0 v4 address",
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//修改此处，可v4或者v6
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"settings": {
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"domainStrategy": "UseIPv4"
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}
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//修改此处，可v4或者v6
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},
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{
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"protocol": "blackhole",
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"settings": {},
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"tag": "blocked"
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}
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],
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"policy": {
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"system": {
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"statsInboundDownlink": true,
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"statsInboundUplink": true
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}
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},
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"routing": {
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"rules": [
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{
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"inboundTag": [
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"api"
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],
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"outboundTag": "api",
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"type": "field"
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},
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{
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"type": "field",
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"outboundTag": "wg0",
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"inboundTag": [
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"<inboundTag>"
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//需要之前在 inbound 中指定好 Tag，我这里是 api 生成的,还可以添加域名等等
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]
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},
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{
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"outboundTag": "blocked",
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"protocol": [
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"bittorrent"
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],
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"type": "field"
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}
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]
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},
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"stats": {}
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}
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```
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</Tab>
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</Tabs>
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::: tip
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可以通过修改 "domainStrategy": "UseIPv6"来控制对应用户的访问方式 实测优先级要高于系统本身的 gai.config
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:::
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## 5、系统设置配置
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::: tip
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需要打开系统的 ip_forward
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:::
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## 6、完成 WireGuard 相关设置
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开启隧道
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```bash
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wg-quick up wg0
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```
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开机自启
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```bash
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systemctl enable wg-quick@wg0
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systemctl start wg-quick@wg0
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```
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验证 IPv4/IPv6
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> 自行验证 Google 搜索 myip
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## 后记
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本文本意是可以避免的多余的流量浪费，将路由和分流的功能交给 Xray 处理。避免了维护路由表的繁琐工作。顺便技术提升 UP。
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## 感谢
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@Xray-core @V2ray-core @WireGuard @p3terx @w @Hiram @Luminous @Ln @JackChou
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