user nobody;

worker_processes 1;

error_log logs/error.log;

error_log logs/error.log notice;

error_log logs/error.log info;

pid logs/nginx.pid;

events {

worker_connections  1024;

}

http {

include       mime.types;
default_type  application/octet-stream;

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;

sendfile        on;
tcp_nopush     on;

keepalive_timeout  65;

charset  utf-8; 

server_names_hash_bucket_size 128; 
client_header_buffer_size 4k; 
client_body_buffer_size  512k; 
client_max_body_size 300m; 
large_client_header_buffers 4 32k;  

tcp_nodelay on; 

proxy_connect_timeout    5; 
proxy_read_timeout       60; 
proxy_send_timeout       60; 
proxy_buffer_size        16k; 
proxy_buffers            4 64k; 
proxy_busy_buffers_size 128k; 
proxy_temp_file_write_size 128k; 

gzip on; 
gzip_min_length  1k; 
gzip_buffers     4 64k; 
gzip_http_version 1.1; 
gzip_comp_level 2; 
gzip_types       text/plain application/x-javascript application/json text/css application/xml; 
gzip_vary 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;
    }
    
    location / {
        proxy_pass http://oa.telecom_ip.com;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_redirect off;
        #proxy_redirect default;
        
    }
}

}

说明：
使用nginx，在阿里云主机上做反向代理就可以了（正常来说，如果OA系统渲染的html链接是绝对链接，并且没有读取Host来拼，那就需要注意配置nginx所在机器的ip或者对应的域名。）

题主您好，

个人觉得，或许直接将OA放在阿里云ECS上运行，这样会不会更好些？