反向代理DuckDuckGo

注意替换example.com与证书路径！
配置如下：

server {
    listen [::]:443;
    listen 443;
    server_name duckgo.example.com;
    ssl on;
    ssl_certificate /root/ssl_cert/duck.crt;
    ssl_certificate_key /root/ssl_cert/duck.key;
    sub_filter_types text/html text/css application/x-javascript text/xml;
    access_log off;

    location / {
        proxy_pass https://duckduckgo.com;
        proxy_set_header Host duckduckgo.com;
        proxy_set_header Accept-Encoding "";
        proxy_set_header Referer "";
        sub_filter "duckduckgo.com" "duckgo.example.com";
        sub_filter_once off;
    }
}

server {
    listen [::]:443;
    listen 443;
    server_name images.duckgo.example.com;
    ssl on;
    ssl_certificate /root/ssl_cert/duck.crt;
    ssl_certificate_key /root/ssl_cert/duck.key;
    access_log off;

    location / {
        proxy_pass https://images.duckduckgo.com;
        proxy_set_header Host images.duckduckgo.com;
    }
}

server {
    listen [::]:443;
    listen 443;
    server_name icons.duckgo.example.com;
    ssl on;
    ssl_certificate /root/ssl_cert/duck.crt;
    ssl_certificate_key /root/ssl_cert/duck.key;
    access_log off;

    location / {
        proxy_pass https://icons.duckduckgo.com;
        proxy_set_header Host icons.duckduckgo.com;
    }
}

server {
    listen [::]:443;
    listen 443;
    server_name ac.duckgo.example.com;
    ssl on;
    ssl_certificate /root/ssl_cert/duck.crt;
    ssl_certificate_key /root/ssl_cert/duck.key;
    access_log off;

    location / {
        proxy_pass https://ac.duckduckgo.com;
        proxy_set_header Host ac.duckduckgo.com;
    }
}

server {
    listen [::]:443;
    listen 443;
    server_name external-content.duckgo.example.com;
    ssl on;
    ssl_certificate /root/ssl_cert/duck.crt;
    ssl_certificate_key /root/ssl_cert/duck.key;
    access_log off;

    location / {
        proxy_pass https://external-content.duckduckgo.com;
        proxy_set_header Host external-content.duckduckgo.com;
    }
}
server {
    listen [::]:443;
    listen 443;
    server_name improving.duckgo.example.com;
    ssl on;
    ssl_certificate /root/ssl_cert/duck.crt;
    ssl_certificate_key /root/ssl_cert/duck.key;
    access_log off;

    location / {
        proxy_pass https://improving.duckduckgo.com;
        proxy_set_header Host improving.duckduckgo.com;
    }
}