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a simple DNS-over-HTTPS client

Project description

doh-cli

A simple DNS over HTTPS client for the command line.

This is a simple DoH python client (RFC 8484, GET), which supports plain (default) and json output.

Install

pip3 install doh-cli

Upgrade

or upgrade to latest version by

pip install --upgrade doh-cli

Requirements

It's based & tested on Python 3.

If you want to contribute, you can clone the repository and install all dependencies locally:

pip3 install .

Usage

doh-cli libredns.gr A

Help

doh-cli --help

Supported Resource Records

  • A
  • AAAA
  • CNAME
  • MX
  • NS
  • SOA
  • SPF
  • SRV
  • TXT
  • CAA
  • DNSKEY
  • DS

Supported DoH Providers

DoH Options

  • libredns (default)
  • libredns-ads (LibreDNS No-Trackers/Ads)
  • google
  • cloudflare
  • quad9
  • cleanbrowsing (blocks access to adult, pornographic and explicit sites, also VPNs)
  • cleanbrowsing-secure (blocks access to phishing, malware and malicious domains)
  • cleanbrowsing-adult (blocks access to all adult, pornographic and explicit sites)
  • cira (CIRA's Canadian Shield)
  • cira-protect (Malware and phishing protection)
  • cira-family (blocking pornographic content plus protected)
  • securedns
  • securedns-ads (blockign ads, malware and phishing)

Some Examples

IPv4

doh-cli libredns.gr A
116.202.176.26

in json

doh-cli libredns.gr A --json
[{"Query": "libredns.gr.", "TTL": "366", "RR": "A", "Answer": "116.202.176.26"}]

you can use jq to format, parse output:

doh-cli libredns.gr A --json | jq .
[
  {
    "Query": "libredns.gr.",
    "TTL": "54",
    "RR": "A",
    "Answer": "116.202.176.26"
  }
]

IPv6

doh-cli example.org AAAA

2606:2800:220:1:248:1893:25c8:1946
doh-cli example.org AAAA --json | jq .

[
  {
    "Query": "example.org.",
    "TTL": "45832",
    "RR": "AAAA",
    "Answer": [
      "2606:2800:220:1:248:1893:25c8:1946"
    ]
  }
]

CNAME

doh-cli www.libredns.gr CNAME --json | jq .
[
  {
    "Query": "www.libredns.gr.",
    "TTL": "600",
    "RR": "CNAME",
    "Answer": "libredns.gr."
  }
]

MX

doh-cli libreops.cc MX --json | jq .
[
  {
    "Query": "libreops.cc.",
    "TTL": "10794",
    "RR": "MX",
    "Answer": [
      "10",
      "spool.mail.gandi.net.",
      "libreops.cc.",
      "10794",
      "IN",
      "MX",
      "50",
      "fb.mail.gandi.net."
    ]
  }
]

CAA

doh-cli libredns.gr CAA --json
[{"Query": "libredns.gr.", "TTL": "590", "RR": "CAA", "Answer": ["0", "issue", "\"letsencrypt.org\""]}]

DNSKEY

DNS Key record The key record used in DNSSEC. Uses the same format as the KEY record.

doh-cli DNSKEY nasa.gov

256 3 8 AwEAAd86yGbz2WUp4VqClb1svSW9oyx0 CQqCCGebNIEEqbXsF5PtCz225RKL3cDr mPHIeSETR6iUvfPSDiKquYearoLFmPjU 0q1AJJmrZIzl9rDgMx/c9OPJxBnhp196 ntJEaGySgXSoaXQEdUpm8lZzhkjftTfC X9mwDY2abxa3Vq3t
256 3 8 AwEAAa/Jh5zZ/apbhzIG6CEUT8LL+WNK +HuVLbFf/pxk5Q/Qmng08J1+24B5ObWK +lUNGHN/FYC0TVbbofeHHOLVS88CBmK9 Zu5RWqDicYYKFu8vra+MXEcwLc6E0fTf R9I/OAIWF6GScPHnkq8GoK2qau8gSD96 UsAw6mCsWEqdyqof
257 3 8 AwEAAbo7ImTCXl2KuV8NK+0zEvLC+OrN M0/6rT/kKZncFc0CqIIQwZUJtdurpvi3 mUFY0J6Pv394E2gu/OLOe+EcIRatjxSv KITBM+PJTJq0OtwsGtBQyu4uU8hS2SNE g1hEJVGHE5q5LWIAy01TBnibyGOyVJE4 N3M50ezp4E7DqEYG6WkhZQxLDjn0T4ex KPDqIkP+QUB6OwF2CWKtWtpPIpI1i9h9 OgIWUfXb3uLEgcnJlAYYAf9Jw35hPPDo FP+Zi9fJ4mQ0olm8gj4668QZoCJ57MDr 3p3Rntfw5Ca+AQVNwnaqcB7iUWHYPZP0 KLk7V02NloWXpwNHOA8O1TsOYtc=

DS

Delegation signer The record used to identify the DNSSEC signing key of a delegated zone

doh-cli nasa.gov DS --output=json | jq .

[
  {
    "Query": "nasa.gov.",
    "TTL": "3588",
    "RR": "DS",
    "Answer": [
      "41452",
      "8",
      "2",
      "7490b7f47af44d4c0bed3a7a2fefeb50cf55e3209e5a82e30a44f9d4aa9ae688"
    ]
  }
]
[
  {
    "Query": "nasa.gov.",
    "TTL": "3588",
    "RR": "DS",
    "Answer": [
      "41452",
      "8",
      "1",
      "83bb6c5ac559bbe1e8b17a98465145265a3cafc4"
    ]
  }
]

DNSSEC

Using --dnssec sets the EDNS DO flag. The response will then include the DNSSEC signature for the requested record set.

doh-cli A nasa.gov --dnssec
52.0.14.116
23.22.39.120
8 2 600 20210325164559 20210223160609 6816 nasa.gov. HqVx19SOdF4Mx2+UZl7rhecv99zJdj07 86R7sAAXP2poG5QDa9zpYz7WXz/y2UtV HpMk+0gfb2SrxQ1p93+VWs0S2UxnwZQI 8qtwuB6/9780LVLa8ZHEDVZzdO1NAAx1 AfaaQ0FjoxErPipPBi4edvMSYjnvVhY+ 0baRH2i1syk=

Plain Output

doh-cli libredns.gr A
116.202.176.26

verbose

doh-cli libredns.gr A --verbose
116.202.176.26
Verbose: https://doh.libredns.gr/dns-query?dns=lSIBAAABAAAAAAAACGxpYnJlZG5zAmdyAAABAAE

debug

doh-cli test.libredns.gr A --debug
116.202.176.26
Debug:  id 24169
opcode QUERY
rcode NOERROR
flags QR RD RA
;QUESTION
test.libredns.gr. IN A
;ANSWER
test.libredns.gr. 3600 IN A 116.202.176.26
;AUTHORITY
libredns.gr. 1822 IN SOA ns1.gandi.net. hostmaster.gandi.net. 1582812814 10800 3600 604800 10800
;ADDITIONAL

Query time

doh-cli test.libredns.gr A --time
116.202.176.26
Query time:  531.764
doh-cli test.libredns.gr --time --json | jq .
[
  {
    "Query": "test.libredns.gr.",
    "TTL": "3600",
    "RR": "A",
    "Answer": [
      "116.202.176.26"
    ]
  },
  {
    "Query Time": "476.537"
  }
]

Disclaimer: This value is related to the client request towards the DoH provider, not the actual dns response.

Choose another DNS server

doh-cli libredns.gr A --dns cloudflare
116.202.176.26

or you can use LibreDNS Block Trackers endpoint:

doh-cli --dns libredns-ads analytics.google.com A
0.0.0.0

or provide your own DoH url:

doh-cli --url https://doh.libredns.gr/dns-query www.example.com A
93.184.216.34

Notice: This option (--url) overrides the --dns option.

Changelog

This document tracks all notable changes to doh-cli, introduced on each release.

v0.6 - 2021-03-25

  • Add support to request DNSSEC signatures
  • Support handling multiple answer sections in a response
  • Use itertools to append multiple dns answers
  • Simplify doh-cli plain/json usage
  • Enhance code readability
  • Make doh-cli module more independent
  • Update README accordingly

v0.5 - 2021-03-05

  • Add support for DNSKEY and DS RRs
  • Update README with new RR examples
  • Fix output bug on multiple answers

v0.4 - 2021-03-02

  • Update Documentation Notes
  • Add custom DoH endpoint --url option
  • Add version option to doh-cli
  • Add cleanbrowsing & securedns DoH Endpoints
  • Verbose option returns the rest DoH request
  • Show multiple DNS answers when exist
  • Use base64url for dns request message
  • DNS response should have "application/dns-message" headers
  • Using RequestException instead of generic Exception
  • Split module for readability and modularity

v0.3 - 2020-04-12

  • Swapping positional arguments (domain, RR) if needed
  • Check Response Status in case of a Server Error
  • Switched default output to plain
  • Debug, Verbose & Query Time values are now part of plain/json output

v0.2 - 2020-04-08

  • Support custom DoH endpoints
  • More verbose debug option
  • Allow user to use any RR type
  • Add CIRA provider
  • New time option for query response time
  • Expand documentation
  • New verbose option for displaying DNS wire

v0.1 - 2019-12-24

  • Initial release

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