方案背景

部分客户会在腾讯云短信配置回执URL（功能描述：短信下发给用户后，腾讯云短信服务可以通过回调业务 URL 的方式，通知业务方短信下发的状态），但是客户不希望直接把内部业务的机器配置成回执接收方，把IP暴露出去。

方案介绍

通过nginx添加一层反向代理实现转发，就可以对外隐藏内网机器的信息。

实施方案

准备：(系统 ：centos 7.6)

短信状态回调URL机器：外网不能直接访问，与代理机可以通信。 IP：172.16.0.9 A机

nginx代理机器：外网可以直接访问，与代理机可以通信。IP：159.75.219.99 B机

*资源有限，我用同一台机器的内外网IP分别当作A机和B机。

A机搭建短信回执接收接口

安装python环境（3.0+）

wget https://mirrors.tuna.tsinghua.edu.cn/anaconda/miniconda/Miniconda3-py39_4.9.2-Linux-x86_64.sh
bash Miniconda3-py39_4.9.2-Linux-x86_64.sh
source /root/.bashrc
conda -V
conda deactivate
conda create -n py39 python=3.9.2
conda activate py39
pip install flask

编写回执接收接口

# _*_ coding:utf-8 _*_
from flask import Flask
from flask import request
app=Flask(__name__)
@app.route("/proxy_callback",methods=["POST"])
def receiveResponse():
    if request.method=="POST":
        print(request.json)
    return "sms callback!"
if __name__=="__main__":
    app.run(host="172.16.0.9",port=9527,debug=True)

运行脚本

B机搭建nginx代理

编译安装nginx

wget http://nginx.org/download/nginx-1.20.1.tar.gz
tar xzvf nginx-1.20.1.tar.gz
cd nginx-1.20.1/
./configure --prefix=/usr/local/nginx --with-http_ssl_module --with-http_stub_status_module --with-http_realip_module --with-threads --with-stream
make && make install

nginx启动测试

cd /usr/local/nginx/
./sbin/nginx -v
./sbin/nginx

nginx主配置文件（nginx.conf）修改

http {
    include       mime.types;
    #default_type  application/octet-stream;
    default_type  application/json;
    include vhosts/*.conf;
    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';
    #access_log  logs/access.log  main;
    log_format log_req_resp escape=json '$remote_addr - $remote_user [$time_local] '
        '"$request" $status $body_bytes_sent '
        '"$http_referer" "$http_user_agent" $request_time "$request_body"';
access_log  logs/access.log  log_req_resp;
    sendfile        on;
    #tcp_nopush     on;
    #keepalive_timeout  0;
    keepalive_timeout  65;
    #gzip  on;
    server {
        listen       80;
        server_name  localhost;
        #charset koi8-r;
        #access_log  logs/host.access.log  main;
        location / {
            root   html;
            index  index.html index.htm;
        #error_page  404              /404.html;
        # redirect server error pages to the static page /50x.html
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #location ~ /\.ht {
        #    deny  all;
    # another virtual host using mix of IP-, name-, and port-based configuration
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;
    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    # HTTPS server
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;
    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;
    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;
    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;
    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
}

*修改部分

nginx虚拟主机文件配置

mkdir /usr/local/nginx/conf/vhosts
vim T159.75.219.99.conf

T159.75.219.99.conf配置内容

server {
	listen 80;
	server_name 159.75.219.99;
        location /proxy_callback {
                proxy_pass http://172.16.0.9:9527;
                 proxy_set_header X-Real-IP $remote_addr;
 proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;