fallback对shadowsocks以及xtls的支持

[vangork]

测试下来，fallback似乎无法对shadowsocks+tls进行sni分流，以及vless fallback 到trojan后使用xtls连接trojan。希望得到确认。

服务端配置如下：

"inbounds": [
	{
		"port": 443,
		"protocol": "vless",
		"settings": {
			"clients": [
				{
					"id": "", 
					"flow": "xtls-rprx-direct",
					"level": 0,
					"email": "love@example.com"
				}
			],
			"decryption": "none",
			"fallbacks": [
				{
					"dest": 8888, // 默认回落到 Xray 的 Trojan 协议
					"xver": 1
				},
				{
					"name": "domain2.com", // shadowsocks
					"dest": 9999,
					"xver": 1
				}
			]
		},
		"streamSettings": {
			"network": "tcp",
			"security": "xtls",
			"xtlsSettings": {
				"alpn": [
                                       "h2",
					"http/1.1"
				],
				"certificates": [
					{
						"certificateFile": "/path/to/fullchain.crt", // 证书同时包含domain1.com以及domain2.com
						"keyFile": "/path/to/private.key" 
					}
				]
			}
		}
	},
	{
		"port": 8888,
		"listen": "127.0.0.1",
		"protocol": "trojan",
		"settings": {
			"clients": [
				{
					"password": "", 
					"level": 0,
					"email": "love@example.com"
				}
			],
			"fallbacks": [
				{
					"dest": 80 // 或者回落到其它也防探测的代理
				}
			]
		},
		"streamSettings": {
			"network": "tcp",
			"security": "none",
			"tcpSettings": {
				"acceptProxyProtocol": true
			}
		}
	},
	{
		"port": 9999,
		"protocol": "shadowsocks",
		"settings": {
			"clients": [
				{
					"password": "example_user_1",
					"method": "aes-128-gcm"
				}
			],
			"network": "tcp,udp"
		}
	}
],

客户端使用shadowsocks +tls连接，服务端的日志报错如下：

rejected proxy/shadowsocks: failed to read address > cipher: message authentication failed

客户端config如下：

"outbounds": [
	{
		"protocol": "shadowsocks",
		"settings": {
			"servers": [
				{
					"address": "domain2.com",
					"port": 443,
					"password": "example_user_1",
					"method": "aes-128-gcm"
				}
			]
		},
		"streamSettings": {
			"network": "tcp",
			"security": "tls"
		}
	}
]

客户端使用trojan + xtls连接，服务端的日志报错如下：

app/proxyman/inbound: connection ends > proxy/trojan: failed to use xtls-rprx-direct, maybe "security" is not "xtls"

客户端config如下：

"outbounds": [
	{
		"protocol": "trojan",
		"settings": {
			"servers": [
				{
					"address": "domain1.com", 
					"port": 443,
					"password": "",
                                        "flow": "xtls-rprx-direct"
				}
			]
		},
		"streamSettings": {
			"network": "tcp",
			"security": "xtls"
		}
	}
]

[GleenJi]

借此，想问问，有没有办法在不使用sni的情况下vless+fallback或者trojan+fallback：
1。默认回落80 http端口
2。同时还可以回落到正常的shadowsocks协议（不是ss+ws+tls）

[AkinoKaede]

Shadowsocks 的 UDP 流量是不走 Plugin 的，所以不推荐回落，这个先等 SIP003u 完成了再讨论。
目前回落的 Trojan 是不支持 XTLS 的

[ghost]

"xver": 1

请检查shadowsocks入站是否打开了acceptProxyProtocol

[GleenJi]

"xver": 1

请检查shadowsocks入站是否打开了acceptProxyProtocol

这个东西是什么，感觉加不加没啥用😂我是vless+xtls fallcak到ss+ws+tls，不加也没为什么问题

[RPRX]

@vangork

1. Shadowsocks 入站没写 "acceptProxyProtocol": true
2. VLESS XTLS 回落到 Trojan，目前无法用 Trojan XTLS 连接

@GleenJi

1. PROXY protocol 用于传递真实 IP、端口，请先阅读文档
2. 未知流量与 TLS 流量同端口是明显特征，应使用其它端口