Nginx反向代理Plex时非本地识别问题的解决方法

运行Plex Media Server 1.31.2.6810版本，已在Plex服务器网络设置中配置自定义域名https://plex.mydomain.com和https://mediaplex.mydomain.com，但控制台持续报错：

Request came in with unrecognized domain / IP 'plex.mydomain.com' in header Referer; treating as non-local

需要让Plex客户端被识别为本地设备。

参考@patriotyk的思路，配置适配自定义域名的Nginx反向代理（需确保Plex网络设置正确），同时搭配优化的gzip配置，在CPU资源充足的前提下可最大化Plex客户端性能。不同于多数在线示例，此处未禁用proxy_buffers，结合最高等级的gzip压缩（level 9）和gzip_min_length=256，性能提升明显，影视海报可批量快速加载。

nginx.conf 配置 #

http {
    gzip on;
    gzip_vary on;
    gzip_min_length 256;
    gzip_proxied any;
    gzip_comp_level 9;
    gzip_disable "MSIE [1-6]\.";
    gzip_types
        text/css
        text/xml
        text/plain
        text/javascript
        text/cache-manifest
        text/x-cross-domain-policy
        application/javascript
        application/x-javascript
        application/json
        application/manifest+json
        application/xml
        application/xml+rss
        application/xhtml+xml
        application/rss+xml
        application/rdf+xml
        application/atom+xml
        application/atom_xml
        application/geo+json
        application/ttf
        application/x-ttf
        application/x-font-ttf
        application/x-font-otf
        application/x-font-truetype
        application/x-font-opentype
        application/x-web-app-manifest+json
        application/vnd.ms-fontobject
        font/eot
        font/otf
        font/ttf
        font/opentype
        image/svg+xml
        image/x-icon
        image/bmp;
    geo $lan {
        default 0;
        192.168.1.0/24 1;
    }
    map $http_upgrade $connection_upgrade {
        default upgrade;
        '' close;
    }

    upstream plex_backend {
        server 192.168.1.2:32400;
        keepalive 32;
    }

    server {
        listen 443 ssl http2;
        listen [::]:443 ssl http2;
        server_name plex.mydomain.com mediaplex.mydomain.com;
        client_max_body_size 0;
        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
            root html;
        }
        location / {
            if ($http_x_plex_device_name = '') {
                rewrite ^/$ /web/index.html;
            }
            proxy_pass                          http://plex_backend;
            proxy_set_header Host               192.168.1.2;
            proxy_set_header Referer            https://192.168.1.2:32400;
            proxy_set_header Origin             192.168.1.2;
            proxy_http_version                  1.1;
            proxy_cache_bypass                  $http_upgrade;
            proxy_set_header Upgrade            $http_upgrade;
            proxy_set_header Connection         $connection_upgrade;
            proxy_set_header Accept-Encoding    "";
            proxy_set_header X-Real-IP          $remote_addr;
            proxy_set_header X-Forwarded-For    $proxy_add_x_forwarded_for;
            proxy_set_header X-Forwarded-Proto  $scheme;
            proxy_set_header X-Forwarded-Host   $host;
            proxy_set_header X-Forwarded-Port   $server_port;
            proxy_set_header Sec-Websocket-Extensions $http_sec_websocket_extensions;
            proxy_set_header Sec-Websocket-Key $http_sec_websocket_key;
            proxy_set_header Sec-Websocket-Protocol $http_sec_websocket_protocol;
            proxy_set_header Sec-Websocket-Version $http_sec_websocket_version;
            proxy_connect_timeout               300;
            proxy_send_timeout                  300;
            proxy_read_timeout                  300;
            proxy_buffers                       512 512k;
            proxy_buffer_size                   512k;
            proxy_busy_buffers_size             512k;
            proxy_redirect off;
        }
    }

}

效果验证 #

使用上述配置后，原报错不再出现，控制台日志显示客户端已被识别为本地设备：

Request: [192.168.1.2:31997 (Allowed Network (Subnet))] GET /status/sessions (14 live) #dc855 Signed-in

内容的提问来源于stack exchange，提问作者MKANET