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？