请教个 nginx 端口转发的问题

机器 A 在异地，我本地无法直接连接，机器 A 上部署了个服务，64297 端口了 nginx 代理，开启了 ssl 、auth 等。相关配置如下：

server {

    #########################
    ### Basic server settings
    #########################
    listen 64297 ssl http2;
    index tpotweb.html;
    ssl_protocols TLSv1.3;
    server_name example.com;
    error_page 300 301 302 400 401 402 403 404 500 501 502 503 504 /error.html;


    ##############################################
    ### Remove version number add different header
    ##############################################
    server_tokens off;
    more_set_headers 'Server: apache';


    ##############################################
    ### SSL settings and Cipher Suites
    ##############################################
    ssl_certificate /etc/nginx/cert/nginx.crt;
    ssl_certificate_key /etc/nginx/cert/nginx.key;
    
    ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH:!DHE:!SHA:!SHA256';
    ssl_ecdh_curve secp384r1;
    ssl_dhparam /etc/nginx/ssl/dhparam4096.pem;

    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;


    ####################################
    ### OWASP recommendations / settings
    ####################################

    ### Size Limits & Buffer Overflows 
    ### the size may be configured based on the needs. 
    client_body_buffer_size  128k;
    client_header_buffer_size 1k;
    client_max_body_size 256k;
    large_client_header_buffers 2 1k;

    ### Mitigate Slow HHTP DoS Attack
    ### Timeouts definition ##
    client_body_timeout   10;
    client_header_timeout 10;
    keepalive_timeout     5 5;
    send_timeout          10;

    ### X-Frame-Options is to prevent from clickJacking attack
    add_header X-Frame-Options SAMEORIGIN;

    ### disable content-type sniffing on some browsers.
    add_header X-Content-Type-Options nosniff;

    ### This header enables the Cross-site scripting (XSS) filter
    add_header X-XSS-Protection "1; mode=block";

    ### This will enforce HTTP browsing into HTTPS and avoid ssl stripping attack
    add_header Strict-Transport-Security "max-age=31536000; includeSubdomains;";


    ##################################
    ### Restrict access and basic auth
    ##################################

    # satisfy all;
    satisfy any;

    allow 127.0.0.1;
    allow ::1;
    deny  all;

    auth_basic           "closed site";
    auth_basic_user_file /etc/nginx/nginxpasswd;


    #################
    ### Proxied sites
    #################

    ### Kibana
    location /kibana/ {
        proxy_pass http://127.0.0.1:64296;
        rewrite /kibana/(.*)$ /$1 break;
    }

    ### ES 
    location /es/ {
        proxy_pass http://127.0.0.1:64298/;
        rewrite /es/(.*)$ /$1 break;
    }

    ### head standalone 
    location /myhead/ {
        proxy_pass http://127.0.0.1:64302/;
        rewrite /myhead/(.*)$ /$1 break;
    }

    ### CyberChef
    location /cyberchef {
        proxy_pass http://127.0.0.1:64299;
        rewrite ^/cyberchef(.*)$ /$1 break;
    }

    ### spiderfoot
    location /spiderfoot {
        proxy_pass http://127.0.0.1:64303;
    }

        location /static {
            proxy_pass http://127.0.0.1:64303/spiderfoot/static;
        }

        location /scanviz {
            proxy_pass http://127.0.0.1:64303/spiderfoot/scanviz;
        }
        
        location /scandelete {
            proxy_pass http://127.0.0.1:64303/spiderfoot/scandelete;
        }

}

我这边有台可以连接的 B 机器，可以通这个 A 机器。 我想访问 A 机器的 64297 端口，故想通过 B 机器做中转，将 A 机器的 64297 端口代理到 B 机器上，B 机器 nginx 配置如下：

    server {
        listen 64297;
      
         
        location / {
            # x.x.x.x 为 A 机器 ip
            proxy_pass https://x.x.x.x:64297/;
        }

    }

但是访问 B 机器的 64297 端口，一直报 502 。

请教下大家，该如何解决？