隱藏 Nginx 版本號碼

使用 CURL 指令,可以從伺服器的回應中看到 nginx 的版本是 1.26.2
    
curl -I http://localhost:80
HTTP/1.1 301 Moved Permanently
Server: nginx/1.26.2
Date: Mon, 20 Jan 2025 10:54:11 GMT
Content-Type: text/html
Content-Length: 169
Connection: keep-alive
Location: https://localhost:80/
    

在弱點掃描時會出現 Version Disclosure (Nginx) 風險,我們可以透過修改 Nginx 的設定檔來隱藏 Nginx 版本號碼。

編輯 Nginx 設定檔:
    
sudo vi /etc/nginx/nginx.conf
    

增加 server_tokens 設定值來停止顯示版本號碼:
    
user  nginx;
worker_processes  auto;

error_log  /var/log/nginx/error.log notice;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}


http {
    server_tokens off;

    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    #gzip  on;

    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}
    

檢查設定檔是否正確:
    
sudo nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
    

重新讀取/套用設定檔:
    
sudo systemctl reload nginx
    

再次使用 CURL 指令,就會發現看不到版號了:
    
curl -I http://localhost:80
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Mon, 20 Jan 2025 10:56:05 GMT
Content-Type: text/html
Content-Length: 162
Connection: keep-alive
Location: https://localhost:80/
    

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