nginx 忽略 server_name 和 default_server

我想为同一个 IP 的两个域提供服务。这是我的配置：

http {
    log_format  main  '$server_name $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;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;
    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;
    include /etc/nginx/conf.d/*.conf;
    server {
        listen       80;
        listen       [::]:80;
        server_name  mysite1.com;
        root         /usr/share/nginx/html;
        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;
        location / {
        }
        error_page 404 /404.html;
            location = /40x.html {
        }
        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }
    }
    server {
       listen 80;
       listen [::]:80;
       server_name mysite2.com;
       root /var/www/mysite2.com;
       access_log  /var/log/nginx/mysite2.com  main;
    }    
    server {
        listen       8443 ssl;
        listen       [::]:8443 ssl;
        server_name  mysite1.com;
        client_max_body_size 232m;
        ssl_certificate "/etc/pki/nginx/all.crt";
        ssl_certificate_key ....
        ssl_session_cache shared:SSL:1m;
        ssl_session_timeout  10m;
        ssl_ciphers HIGH:!aNULL:!MD5;
        ssl_prefer_server_ciphers on;
        location /static/ {
            proxy_cache_revalidate on;
            alias /usr/share/nginx/static/;
            add_header Vary Accept-Encoding;
            open_file_cache_valid 1s;
        }        
        location / {
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_pass https://127.0.0.1:9443;
        }
        error_page 404 /404.html;
            location = /40x.html {
        }
        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }
    }
}

问题是我永远无法获得 /var/www/mysite2.com/index.html 的内容。我总是得到 mysite1 的内容。如果我将 mysite2.com 切换到端口 81，那么它会在端口 81 上提供正确的页面，因此该服务器块可以正常工作。我尝试将 default_site 设置为 mysite2，但这并没有帮助，我一直从 mysite1 获取内容。同样在日志中，我从未看到对 mysite2 的请求，即使它正在被提供（/var/log/nginx/mysite2.com 为空）。

我怎样才能解决这个问题？尝试谷歌搜索，阅读其他答案，没有任何帮助。