前提：
内网电脑只能能够访问外网电脑的8086端口。
外网电脑能否访问外网地址。
nginx.conf配置文件示例如下：
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;sendfile on;
keepalive_timeout 65;
server {
listen 8086;
server_name 10.33.36.81;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
proxy_pass http://test.com/;
proxy_set_header Host test.com;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}}
}
效果：
内网电脑通过访问外网电脑IP+端口访问到外网地址：
http://10.33.36.81:8086