Question

任何人都可以指出当我的Nginx服务器被要求提供其不知道的站点时，如何配置默认主机响应吗？我尝试过：

server {
       listen 443 default_server;
       listen [::]:443 default_server;

       server_name _;

       return 444;
}

这最终导致所有其他站点引起“意外关闭连接”错误。

请注意，我没有计划支持旧版https客户端（那些不了解SNI的客户端）。

我正在使用Nginx 1.14.0

Answer 1

通过浏览Web，答案似乎是您需要创建一个自签名证书，然后将其应用于默认主机。没有人会相信这一点，但是鉴于它们以未处理的主机名结尾，这可能没有太大关系吗？

我按照Digital Ocean上的说明进行操作，这里将对其进行总结（太多内容无法包含全部内容）：

创建自签名证书
生成dhparam文件
配置“默认”主机以在https config（端口443）中引用该主机

生成dhparm文件（需要一段时间）：

sudo openssl dhparam -out /etc/ssl/certs/dhparam.pem 2048

默认主机的443配置：

server {
       listen 443 default_server;
       listen [::]:443 default_server;

       include snippets/self-signed.conf;
       include snippets/ssl-params.conf;

       server_name _;

        root /var/www/html;

        # Add index.php to the list if you are using PHP
        index index.html index.htm index.nginx-debian.html;

        server_name _;

        location / {
                ssi on;
                # First attempt to serve request as file, then
                # as directory, then fall back to displaying a 404.
                try_files $uri $uri/ =404;
        }
}

ssl-signed.conf文件内容：

ssl_certificate /etc/ssl/certs/nginx-selfsigned.crt;
ssl_certificate_key /etc/ssl/private/nginx-selfsigned.key;

ssl-params.conf文件内容：

# from https://cipherli.st/

# and https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html

ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH";
ssl_ecdh_curve secp384r1;
ssl_session_cache shared:SSL:10m;
ssl_session_tickets off;
ssl_stapling on;
ssl_stapling_verify on;
resolver 8.8.8.8 8.8.4.4 valid=300s;
resolver_timeout 5s;
# Disable preloading HSTS for now.  You can use the commented out header line that includes
# the "preload" directive if you understand the implications.
#add_header Strict-Transport-Security "max-age=63072000; includeSubdomains; preload";
add_header Strict-Transport-Security "max-age=63072000; includeSubdomains";
add_header X-Frame-Options DENY;
add_header X-Content-Type-Options nosniff;

ssl_dhparam /etc/ssl/certs/dhparam.pem;

请注意，以上内容已通过Nginx 1.14.0进行了测试

使用Nginx和SNI时未知主机的回退配置？

1 个答案: