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Published 20 hours ago • verified publisher icon snail007

多IP服务器UDP功能异常

Open Raymond-C opened this issue 2 years ago • 2 comments

多IP服务器，通过 --bind-ip 绑定出口IP，但实际使用时，发现只有主IP能使用UDP协议。而其他IP只能使用TCP协议。

Expected Behavior

多IP服务器内的所有IP都可以支持TCP/UDP流量

Current Behavior

只有主IP同时支持TCP/UDP流量，非主IP仅支持TCP流量

Possible Solution

Steps to Reproduce

  1. 通过 sps 命令起服务
  2. 通过 SSTap 软件测试，在使用子IP/主IP连接时，不同协议联通情况
  3. 测试结果为 ：只有使用主IP连接时可以发送UDP数据包，使用子IP连接时，只能发送TCP数据
  4. 通过SSTap/V2ray进行全局连接，
  5. 打开IP检查站点，发现通过主IP/子IP连接时，都显示出口IP为 bind-ip 指定的IP
  6. 编写UDP服务端/客户端，测试发送数据包，测试结果为：通过子IP连接无法发送UDP数据包，使用主IP连接时可以发送UDP数据包，但是服务端获取到的发送者IP为主IP

Context (Environment)

  1. proxy version is : commercial_11.8
  2. . full command is : proxy sps --udp -p :6666 --bind-ip 子IP:6666
  3. . system is : ubuntu 20.0
  4. . full log is:

例子中隐去实际IP，主IP用 212.212.212.212 代替，子 IP 段使用 247.247.247.12 代替，客户端IP用 191.191.191.253 代替

root@vz:~# proxy sps --udp -p :6666 --bind-ip 247.247.247.12:6666 2022/06/26 06:18:13.926036 INFO binding 247.247.247.12 for 6666 2022/06/26 06:18:13.926094 INFO init ss local cipher, aes-256-cfb, sspassword 2022/06/26 06:18:13.926265 INFO ss udp disabled 2022/06/26 06:18:13.926276 INFO tcp sps on [::]:6666 2022/06/26 06:18:18.918343 INFO your machine code is : XXXXXXXXXXXXXXXXXXXXXXXX 2022/06/26 06:18:18.918373 INFO checking ... 2022/06/26 06:18:18.932525 INFO binding 247.247.247.12 for 6666 2022/06/26 06:18:19.252370 INFO check success, your machine will expired at 2023-06-20 06:47:19

#以下为使用主IP连接时的测试情况 2022/06/26 06:18:23.937701 INFO binding 247.247.247.12 for 6666 2022/06/26 06:18:28.943881 INFO binding 247.247.247.12 for 6666 2022/06/26 06:18:30.415316 INFO ip 191.191.191.253 rate, current: 1/s, max: 20/s 2022/06/26 06:18:30.415351 INFO outgoing ip is: 247.247.247.12, for 212.212.212.212:6666 2022/06/26 06:18:30.482791 INFO conn 191.191.191.253:35569 - 104.193.88.77:80 connected [www.baidu.com:80] 2022/06/26 06:18:31.869106 INFO s5 udp on [::]:52746 2022/06/26 06:18:32.102434 INFO conn 191.191.191.253:35569 - 104.193.88.77:80 released [www.baidu.com:80] 2022/06/26 06:18:33.949338 INFO binding 247.247.247.12 for 6666 2022/06/26 06:18:34.842252 WARN connect to tcp parent fail, ERR:read auth info fail,ERR: read tcp 212.212.212.212:6666->119.60.104.215:53236: read: connection reset by peer from 119.60.104.215:53236 2022/06/26 06:18:38.955678 INFO binding 247.247.247.12 for 6666 2022/06/26 06:18:43.960872 INFO binding 247.247.247.12 for 6666 2022/06/26 06:18:48.966153 INFO binding 247.247.247.12 for 6666

#以下为使用子IP连接时的测试情况 2022/06/26 06:19:24.005743 INFO binding 247.247.247.12 for 6666 2022/06/26 06:19:29.012340 INFO binding 247.247.247.12 for 6666 2022/06/26 06:19:34.017433 INFO binding 247.247.247.12 for 6666 2022/06/26 06:19:39.022655 INFO binding 247.247.247.12 for 6666 2022/06/26 06:19:43.081951 INFO ip 191.191.191.253 rate, current: 1/s, max: 20/s 2022/06/26 06:19:43.081990 INFO outgoing ip is: 247.247.247.12, for 247.247.247.12:6666 2022/06/26 06:19:43.525221 INFO conn 191.191.191.253:35956 - 104.193.88.123:80 connected [www.baidu.com:80] 2022/06/26 06:19:44.029176 INFO binding 247.247.247.12 for 6666 2022/06/26 06:19:44.733472 INFO s5 udp on [::]:43716 2022/06/26 06:19:44.965335 INFO conn 191.191.191.253:35956 - 104.193.88.123:80 released [www.baidu.com:80] 2022/06/26 06:19:48.410577 INFO s5 udp on [::]:39659 2022/06/26 06:19:49.034397 INFO binding 247.247.247.12 for 6666 2022/06/26 06:19:52.075429 INFO s5 udp on [::]:51154 2022/06/26 06:19:54.039378 INFO binding 247.247.247.12 for 6666 2022/06/26 06:19:55.754057 INFO s5 udp on [::]:54372 2022/06/26 06:19:59.045615 INFO binding 247.247.247.12 for 6666 2022/06/26 06:19:59.401750 INFO s5 udp on [::]:57809

Detailed Description

以下log对应 sstap 连接测试截图 image image

Possible Implementation

Raymond-C avatar Jun 26 '22 11:06 Raymond-C

多IP，-p参数必须指定IP，有多少IP指定多少IP，不指定IP就只有主IP支持UDP，比如 -p 192.168.0.2 :6666 -p 192.168.0.3 :6666 .

snail007 avatar Jun 27 '22 01:06 snail007

找一台绑了2个IP的机器进行测试，结果： 如果是通过goproxy转发到已经起好的父级服务，就没问题； 如果靠goproxy本身去起服务，就无法使用子IP进行UDP数据传输

root@ubuntu:~# ip a
2: eth0: ........
    ......................
    inet 192.168.168.1/22 brd 192.168.168.255 scope global eth0
       valid_lft forever preferred_lft forever
    inet 192.168.168.2/22 brd 192.168.168.255 scope global eth0:0
       valid_lft forever preferred_lft forever

测试1： 命令：proxy sps --udp -p 192.168.168.1:6666 -p 192.168.168.2:6666 --bind-ip 192.168.168.2:6666 结果：启动报错 log：2022/06/29 22:57:15.865826 proxy/main.go:86 ERROR err : flag 'local' cannot be repeated

测试2： 命令：proxy sps --udp -p 192.168.168.1:6666,192.168.168.2:6666 --bind-ip 192.168.168.2:6666 结果：和issue描述的问题一致，log也一样 通过主IP连接可以使用 TCP/UDP。但是UDP的出口IP为主IP；通过子IP连接只能使用TCP

测试3： 命令：1、先用 v2ray 起一个支持UDP的socks5，服务 端口 8888，绑定子IP 192.168.168.2 作为outbound 2、连接 8888 端口测试，可以同时使用TCP/UDP，且UDP端口为 192.168.168.2 3、起goproxy服务 proxy sps -p :6666 --udp -P socks5://127.0.0.1:8888 结果：通过主IP或者子IP都可以连接，且使用 TCP/UDP，UDP出口IP为 192.168.168.2 日志：

goproxy日志：

2022/06/29 23:13:49.687603 INFO conn 191.191.191.253:57450 - 127.0.0.1:8888 connected [www.baidu.com:80]
2022/06/29 23:13:51.378533 INFO conn 191.191.191.253:57450 - 127.0.0.1:8888 released [www.baidu.com:80]

v2ray日志：
2022/06/29 23:13:49 tcp:127.0.0.1:45278 accepted tcp:www.baidu.com:80 [out88]
2022/06/29 23:13:50 udp:127.0.0.1:39027 accepted udp:114.114.114.114:53 [out88]

Raymond-C avatar Jun 29 '22 15:06 Raymond-C