自建反代DoH服务器保护DNS安全服务

由于某些特殊原因，大部分公共DoH服务在某些国家无法访问。
为了安全的获取DNS记录，必须自建DoH服务器。
下面直接列出核心代码，推荐使用谷歌DNS和openDNS

location /lookopen {
        proxy_http_version 1.1;
        proxy_set_header Host $http_host;
        proxy_buffering off;
        proxy_redirect off;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass https://doh.opendns.com/dns-query; 
}

location /lookgg {
        proxy_http_version 1.1;
        proxy_set_header Host $http_host;
        proxy_buffering off;
        proxy_redirect off;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass https://dns.google/dns-query; 
}

location /looksb {
        proxy_http_version 1.1;
        proxy_set_header Host $http_host;
        proxy_buffering off;
        proxy_redirect off;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass https://doh.dns.sb/dns-query; 
}

location /lookiij {
        proxy_http_version 1.1;
        proxy_set_header Host $http_host;
        proxy_buffering off;
        proxy_redirect off;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass https://public.dns.iij.jp/dns-query; 
}

location / {
        return 444;
}