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For my link archive: DNS over https

Posted by jpluimers on 2021/09/02

DNS over HTTPS

For my link archive:

JSON DNS output

Some DNS over HTTSP providers support dns-json, which Cloudflare delivers non-pretty printed.

To pretty print in the same order as the input, pipe through json_pp or python -m json.tool which however will sort (either alphabetically or by dictionary hash) the output.

If you like jq and colourised output, then you can pipe through jq .  as well  (which does not sort the nodes).

Piping curl output requires the curl --silent parameter to suppress progress reporting.

See these for more information:

Example:

$ curl --header 'accept: application/dns-json' 'https://cloudflare-dns.com/dns-query?name=atlassian-domain-for-localhost-connections-only.com&type=A'
{"Status": 0,"TC": false,"RD": true, "RA": true, "AD": false,"CD": false,"Question":[{"name": "atlassian-domain-for-localhost-connections-only.com.", "type": 1}],"Answer":[{"name": "atlassian-domain-for-localhost-connections-only.com.", "type": 1, "TTL": 1761, "data": "127.0.0.1"}]}
$ curl --silent --header 'accept: application/dns-json' 'https://cloudflare-dns.com/dns-query?name=atlassian-domain-for-localhost-connections-only.com&type=A' | json_pp
{
   "Status" : 0,
   "AD" : false,
   "Question" : [
      {
         "type" : 1,
         "name" : "atlassian-domain-for-localhost-connections-only.com."
      }
   ],
   "CD" : false,
   "RD" : true,
   "RA" : true,
   "TC" : false,
   "Answer" : [
      {
         "type" : 1,
         "TTL" : 813,
         "name" : "atlassian-domain-for-localhost-connections-only.com.",
         "data" : "127.0.0.1"
      }
   ]
}
$ curl --silent --header 'accept: application/dns-json' 'https://cloudflare-dns.com/dns-query?name=atlassian-domain-for-localhost-connections-only.com&type=A' | jq .
{
  "Status": 0,
  "TC": false,
  "RD": true,
  "RA": true,
  "AD": false,
  "CD": false,
  "Question": [
    {
      "name": "atlassian-domain-for-localhost-connections-only.com.",
      "type": 1
    }
  ],
  "Answer": [
    {
      "name": "atlassian-domain-for-localhost-connections-only.com.",
      "type": 1,
      "TTL": 218,
      "data": "127.0.0.1"
    }
  ]
}

Based on [WayBack] How to check whether DNS is working through a browser? – Super User

–jeroen

This entry was posted on 2021/09/02 at 18:00 and is filed under Communications Development, Development, DNS, HTTP, Internet, Internet protocol suite, Power User, Software Development, TCP, TLS. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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