nginx端口转发需要特殊模块实现貌似现在转发很多都是http协议那就可以用反代配合ddns

server
#ddns反代
{
    #本地转发监听端口
    listen 17778;
    
    resolver 8.8.8.8 valid=600s;
    resolver_timeout 1s;
     #需要中转的落地鸡域名和端口
    set $proxy_pass_url http://8yy.com:8018; #域名:端口
    
    location / {
     proxy_pass $proxy_pass_url;        
     proxy_http_version 1.1;    
     proxy_set_header Upgrade $http_upgrade;    
     proxy_set_header Connection "Upgrade";    
     proxy_set_header X-real-ip $remote_addr;
     proxy_set_header X-Forwarded-For $remote_addr;
     }
}