nginx创建WSS服务失败

nginx 配置如下:
location /wss{
        proxy_pass http://127.0.0.1:2346;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        rewrite /wss/(.*) /$1 break;
        proxy_redirect off;
    }

访问:
    wss://portal.*****.com/wss

连接不上，提示 Could not connect to wss://portal.*****.com/wss

rewrite /wss/(.*) /$1 break;
proxy_redirect off;