为什么不能通过kcptun + tinyproxy打开网页？

Question

操作系统在vps上：

uname -a
Linux vultr.guest 4.9.0-12-amd64 #1 SMP Debian 4.9.210-1 (2020-01-20) x86_64 GNU/Linux

我用这种方式在我的vps上构建了tinyproxy和kcptun。微型代理

apt-get install tinyproxy
touch  /run/tinyproxy/tinyproxy.pid

保留所有默认设置。

systemctl start tinyproxy
systemctl status  tinyproxy
● tinyproxy.service - Tinyproxy lightweight HTTP Proxy
   Loaded: loaded (/lib/systemd/system/tinyproxy.service; enabled; vendor preset
   Active: active (running) 

tinyproxy处于良好状态，可供使用。

kcptun服务器端获取kcptun服务器端。

wget https://github.com/xtaci/kcptun/releases/download/v20200226/kcptun-linux-amd64-20200226.tar.gz
tar  -zxf  kcptun-linux-amd64-20200226.tar.gz
cp  server_linux_amd64   /usr/bin/server_linux_amd64

为kcptun服务器创建服务。

vi  /etc/systemd/system/kcptun.service
[Unit]
Description=Kcptun server
Requires=network.target
After=network-online.target

[Service]
Type=simple
User=nobody
RemainAfterExit=yes
ExecStart=/usr/bin/server_linux_amd64 -c /etc/kcptun/conf.json  > /tmp/kcptun.log  2>&1 
ExecReload=/usr/bin/kill -HUP $MAINPID
RestartSec=1min
Restart=on-failure

[Install]
WantedBy=multi-user.target

为kcptun服务器端设置配置文件。

vim  /etc/kcptun/conf.json
{
        "listen": ":20000",
        "target": "127.0.0.1:8888",
        "key": "xxxxxxxx",
        "crypt": "salsa20",
        "mode": "normal",
        "mtu": 1400,
        "sndwnd": 2048,
        "rcvwnd": 2048,
        "datashard": 10,
        "parityshard": 3,
        "dscp": 46,
        "nocomp": true,
        "acknodelay": false,
        "nodelay": 1,
        "interval": 40,
        "resend": 2,
        "nc": 1,
        "sockbuf": 16777217,
        "smuxver": 1,
        "smuxbuf": 16777217,
        "streambuf": 2097152,
        "keepalive": 10,
        "pprof":false,
        "quiet":false,
        "tcp":false
}

8888是tinyproxy的端口，20000是kcptun服务器和kcptun客户端之间的连接端口。

打开20000端口。

firewall-cmd --zone=public --add-port=20000/udp --permanent
firewall-cmd --reload

Sart kcptun服务器。

systemctl start kcptun
systemctl status kcptun
● kcptun.service - Kcptun server
   Loaded: loaded (/etc/systemd/system/kcptun.service; disabled; vendor preset: 
   Active: active (running) since Sun 2020-03-08 08:14:26 UTC; 58min ago
 Main PID: 2082 (server_linux_am)
    Tasks: 6 (limit: 4915)
   CGroup: /system.slice/kcptun.service
           └─2082 /usr/bin/server_linux_amd64 -c /etc/kcptun/conf.json

情况很好。

在本地pc中，kcptun客户端几乎与在vps上设置kcptun服务器相同。去找kcptun

wget https://github.com/xtaci/kcptun/releases/download/v20200226/kcptun-linux-amd64-20200226.tar.gz
tar  -zxf  kcptun-linux-amd64-20200226.tar.gz   

为kcptun客户端创建一个服务。

vim /etc/systemd/system/kcptun.service
[Unit]
Description=kcptun
Wants=basic.target
After=basic.target network.target

[Service]
User=nobody
Group=nogroup
ProtectSystem=full
ExecStart=/home/debian/client_linux_amd64 -c /home/debian/config.json  > /tmp/kcptun.log 2>&1
ExecReload=/bin/kill -HUP $MAINPID
Restart=always
StandardOutput=syslog
StandardError=syslog
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target

设置配置文件。

vim config.json
{
  "localaddr": "127.0.0.1:8123",
  "remoteaddr": "vps_ip:20000",
  "key": "xxxxxxxx",
  "crypt": "salsa20",
  "mode": "normal",
  "dscp": 46,
  "sockbuf": 16777217,
  "smuxver": 2,
  "streambuf": 2097152,
  "nocomp": true
}

在我的浏览器上设置代理--firefox，127.0.0.1，端口8123。

启动kcptun客户端服务。

systemctl start kcptun
systemctl status kcptun
● kcptun.service - kcptun
   Loaded: loaded (/etc/systemd/system/kcptun.service; disabled; vendor preset: 
   Active: active (running)

它也处于良好的状态，我不能通过firefox(8123)--kcptun client(27107)--(27107)kcptun server(8888)--tinyproxy(8888)--target webpage打开网页，检查它的端口。

lsof -i :20000
COMMAND    PID   USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
server_li 4363 nobody    6u  IPv6  23318      0t0  UDP *:20000 

港口状况良好。客户端和服务器端都没有日志文件。

在服务器端：

cat /tmp/kcptun.log

没有输出。

在客户端：

cat /tmp/kcptun.log

没有输出。

Answer 1

1.在firefox中设置http和https代理。2.在vps服务器端设置config.json。

vim /etc/kcptun/config.json
{
  "listen": ":20000",
  "target": "127.0.0.1:8888",
  "key": "xxxxxxxx",
  "crypt": "salsa20",
  "mode": "normal",
  "dscp": 46,
  "sockbuf": 16777217,
  "smuxver": 2,
  "streambuf": 2097152,
  "nocomp": true
}