[网络协议]frp 内网穿透（http、https、websocket、proxy protocol）

准备

• 云服务器一台，本次使用阿里云服务器centos8.5，需要在阿里云后台打开服务器安全组端口 7000、8000、6000，IP假定为12.12.12.12
• 备案域名一个，假定为：test.example.com
• 本地环境MacOS
• 文档：https://gofrp.org/docs/
• 客户端frpc与服务器端frps，下载地址：https://github.com/fatedier/frp/releases；找到对应机型的包下载解压即可
• mac可用 brew install frpc安装客户端

# 启动 下面二选一
brew services restart frpc
或
/usr/local/opt/frpc/bin/frpc -c /usr/local/etc/frp/frpc.ini

• linux服务器端(centos8.5)

wget https://github.com/fatedier/frp/releases/download/v0.39.1/frp_0.39.1_linux_386.tar.gz
tar -axf frp_0.39.1_linux_386.tar.gz
cd frp_0.39.1_linux_386
# 启动
./frps -c frps.ini
# 使用systemctl start frps启动
cp systemd/frps.service /etc/systemd/system/
cp frps /usr/bin/frps
mkdir  /etc/frp/
cp frps.ini /etc/frp/
# 设置开机自启动
systemctl enable frps

服务端配置

• frps.ini

[common]
# listen 端口
bind_port = 7000

# 这两个端口可以和bind_port相同
vhost_http_port = 7000
vhost_https_port = 7000

# 配置服务器dashboard，监控服务器连接流量等，通过12.12.12.12:8000访问
dashboard_addr = 0.0.0.0
dashboard_port = 8000
dashboard_user = admin
dashboard_pwd = adminpasswd

# 设置token校验，客户端的token和它一致
authentication_method = token
token = admintoken

• 解析域名到服务器ip test.example.com 12.12.12.12
• 给域名申请ssl证书 test.example.com.pem 和 test.example.com.key

客户端配置

公共配置

• frpc.ini

[common]
server_addr = 12.12.12.12
server_port = 7000

token = admintoken

# 客户端监控
admin_addr = 127.0.0.1
admin_port = 7400
admin_user = admin
admin_pwd = admin

ssh，websocket

• frpc.ini

[ssh]
type = tcp
local_ip = 127.0.0.1
local_port = 22
remote_port = 6000

• ssh -p 6000 root@test.example.com ：即可远程访问内网穿透主机
• MacOS默认不能远程访问，需要System Preferences->Sharing->Remote Login勾选才能访问
• websocket配置和上面一样（底层为tcp协议），只需要换为对应的端口即可

http

• frpc.ini

[web01]
type = http
local_ip = 127.0.0.1
local_port = 10000
custom_domains = web01.test.example.com

[web02]
type = http
local_ip = 127.0.0.1
local_port = 10001
custom_domains = web02.test.example.com

• 服务端frps.ini需要配置vhost_http_port参数，此处配置为7000
• 则http://web01.test.example.com:7000指向访问本地127.0.0.1:10000的服务；http://web02.test.example.com:7000指向访问本地127.0.0.1:10001的服务

https

• frpc.ini

[api_https]
type = https
custom_domains = api.test.example.com
plugin = https2http
plugin_local_addr = 127.0.0.1:8080
# HTTPS 证书相关的配置
plugin_crt_path = /usr/local/etc/nginx/cert/test.example.com.pem
plugin_key_path = /usr/local/etc/nginx/cert/test.example.com.key
plugin_host_header_rewrite = 127.0.0.1
plugin_header_X-From-Where = frp

• 服务端frps.ini需要配置vhost_https_port参数，此处配置为7000
• 直接访问https://api.test.example.com:7000 可以访问 本地http://127.0.0.1:8080服务

虚拟主机服务

• nginx通过Host Header来区分相同端口下的虚拟主机服务，此处使用host_header_rewrite改写host可以实现代理虚拟主机服务。
• frpc.ini

[api]
type = http
local_port = 80
custom_domains = api.test.example.com
host_header_rewrite = api.local.com

[m]
type = http
local_port = 80
custom_domains = m.test.example.com
host_header_rewrite = m.local.com

• nginx配置，可拿真实ip。
  • $proxy_add_x_forwarded_for = $http_x_forwarded_for + $remote_addr
  • 可以使用

http{
		......
		log_format  access 'proxy_protocol_addr:$proxy_protocol_addr, remote_addr:$remote_addr, http_x_forwarded_for:$http_x_forwarded_for, proxy_add_x_forwarded_for:$proxy_add_x_forwarded_for';
		access_log  /Users/junmo/logs/nginx/access.log  access;
		......
		server {
			listen 80;
			server_name  m.local.com;
			
			location / {
				proxy_pass   http://127.0.0.1:8080;
				index  index.html index.htm;
				proxy_set_header Host $host;
				proxy_set_header X-Real-IP $remote_addr;
				proxy_set_header  X-Forwarded-Host $server_name;
				proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
			}
		}
}

• nginx日志
  • ps：对于正常的nginx访问，可以使用X-Forwarded-For头隐藏真实ip，但是要祈祷服务端不要使用$remote_addr来获取真实ip

$ curl m.test.example.com:7000
proxy_protocol_addr:-, remote_addr:127.0.0.1, http_x_forwarded_for:123.115.146.226, proxy_add_x_forwarded_for:123.115.146.226, 127.0.0.1
$ curl  -H "X-Forwarded-For: 1.1.1.1"  m.test.example.com:7000
proxy_protocol_addr:-, remote_addr:127.0.0.1, http_x_forwarded_for:1.1.1.1, 123.115.146.226, proxy_add_x_forwarded_for:1.1.1.1, 123.115.146.226, 127.0.0.1

http_proxy

• 使用服务器代理访问
• 在shell终端输入，即可在此终端使用服务器代理访问
  • export http_proxy=12.12.12.12:6000
  • export https_proxy=12.12.12.12:6000
• frpc.ini

[http_proxy]
type = tcp
remote_port = 6000
plugin = http_proxy
#plugin_http_user = abc
#plugin_http_passwd = abc

proxy protocol

• 使用proxy protocol，就可以配置ssl证书在nginx里，也可以拿到真实的客户端ip，当前版本0.39的https代理是不能拿到真实客户端ip的
• frpc.ini

[web]
type = https
local_port = 443
custom_domains = web.test.example.com
# 目前支持 v1 和 v2 两个版本的 proxy protocol 协议。
proxy_protocol_version = v2

• nginx配置，使用 $proxy_protocol_addr可以获得真实的ip，而不是代理的ip

# 观察ip
http{
		......
		log_format  access 'proxy_protocol_addr:$proxy_protocol_addr, remote_addr:$remote_addr, http_x_forwarded_for:$http_x_forwarded_for, proxy_add_x_forwarded_for:$proxy_add_x_forwarded_for';
		access_log  /Users/junmo/logs/nginx/access.log  access;
		......
		server {
			listen 443 proxy_protocol;
			server_name   web.test.example.com;
		
			ssl_certificate cert/ web.test.example.com.pem;
			ssl_certificate_key cert/ web.test.example.com.key;
			ssl_session_timeout 5m;
			ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
			ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
			ssl_prefer_server_ciphers on;
		
			location / {
				proxy_pass   http://127.0.0.1:8080;
				index  index.html index.htm;
				proxy_set_header Host $host;
				proxy_set_header X-Real-IP $proxy_protocol_addr;
				proxy_set_header  X-Forwarded-Host $server_name;
				proxy_set_header X-Forwarded-For $proxy_protocol_addr;
			}
		}
}

• nginx 日志

proxy_protocol_addr:123.115.146.226, remote_addr:127.0.0.1, http_x_forwarded_for:-, proxy_add_x_forwarded_for:127.0.0.1