原因

nginx反向代理非80、8080端口会出现端口丢失的情况

解决

添加proxy_set_header Host $host:$server_port;即可

upstream f5 {
        server 172.16.31.222:1962;
    }

server {
    listen 1962;
    server_name localhost 172.16.6.10;
    proxy_set_header Host $host:$server_port;
    location / {
        proxy_pass http://f5;
    }
}