LibreDNS doesn't support DNSSEC #2216

2021-02-25T18:01:47Z

pilou- commented

2021-02-25 18:01:47 +00:00

(Migrated from github.com)

Description

Same as #2146.

I asked on #libreops:matrix.org if DNSSEC is supported by the LibreDNS service, the answer is:

not yet , on our todo list

Tested with the following commands:

$ kdig @116.202.176.26 +tls-host=dot.libredns.gr +dnssec sigfail.verteiltesysteme.net
;; TLS session (TLS1.3)-(ECDHE-SECP256R1)-(RSA-PSS-RSAE-SHA256)-(AES-256-GCM)
;; ->>HEADER<<- opcode: QUERY; status: NOERROR; id: 8416
;; Flags: qr rd ra; QUERY: 1; ANSWER: 2; AUTHORITY: 0; ADDITIONAL: 1

;; EDNS PSEUDOSECTION:
;; Version: 0; flags: do; UDP size: 512 B; ext-rcode: NOERROR

;; QUESTION SECTION:
;; sigfail.verteiltesysteme.net.		IN	A

;; ANSWER SECTION:
sigfail.verteiltesysteme.net.	42	IN	A	134.91.78.139
sigfail.verteiltesysteme.net.	42	IN	RRSIG	A 5 3 60 20210502030010 20210131030010 30665 verteiltesysteme.net. //This+RRSIG+is+deliberately+broken///For+more+information+please+go+to/http+//www+verteiltesysteme+net///////////////////////////////////////////////////////////////////8=

The status is NOERROR and the AD flags is missing but the expected status is SERVAIL.

This unexpected behavior can be tested with another domain:

$ kdig @116.202.176.26 +tls-host=dot.libredns.gr +dnssec www.dnssec-failed.org
;; TLS session (TLS1.3)-(ECDHE-SECP256R1)-(RSA-PSS-RSAE-SHA256)-(AES-256-GCM)
;; ->>HEADER<<- opcode: QUERY; status: NOERROR; id: 62932
;; Flags: qr rd ra; QUERY: 1; ANSWER: 3; AUTHORITY: 0; ADDITIONAL: 1

;; EDNS PSEUDOSECTION:
;; Version: 0; flags: do; UDP size: 512 B; ext-rcode: NOERROR

;; QUESTION SECTION:
;; www.dnssec-failed.org.		IN	A

;; ANSWER SECTION:
www.dnssec-failed.org.	4205	IN	A	68.87.109.242
www.dnssec-failed.org.	4205	IN	A	69.252.193.191
www.dnssec-failed.org.	4205	IN	RRSIG	A 5 3 7200 20210314145058 20210225144558 44973 dnssec-failed.org. ugoAA9teSApCHc8De+5hfxrY/BjD9LSE/fguwdMu0zcvtSF6oIS0iLIY1J94nDecv+YA8YAKC2AcRJhpEIjtaFnTKVrKvTEgr1IMjjujxk7GIGolMht+byvWzPlOf/hGZqlwykNkFRm9syu8OB5oshh/keZC0TflGNA+rUNlET8=

Output of the same command using providers with DNSSEC enabled:

$ kdig @9.9.9.9 +tls-host=dns.quad9.net sigfail.verteiltesysteme.net
;; TLS session (TLS1.3)-(ECDHE-SECP256R1)-(ECDSA-SECP256R1-SHA256)-(AES-256-GCM)
;; ->>HEADER<<- opcode: QUERY; status: SERVFAIL; id: 18459
;; Flags: qr rd ra; QUERY: 1; ANSWER: 0; AUTHORITY: 0; ADDITIONAL: 1

;; QUESTION SECTION:
;; sigfail.verteiltesysteme.net.		IN	A

 kdig @45.90.57.121 +tls-host=dot-ch.blahdns.com sigfail.verteiltesysteme.net
;; TLS session (TLS1.3)-(ECDHE-SECP256R1)-(RSA-PSS-RSAE-SHA256)-(AES-256-GCM)
;; ->>HEADER<<- opcode: QUERY; status: SERVFAIL; id: 59870
;; Flags: qr rd ra; QUERY: 1; ANSWER: 0; AUTHORITY: 0; ADDITIONAL: 1

;; QUESTION SECTION:
;; sigfail.verteiltesysteme.net.		IN	A

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## Description Same as #2146. I asked on [#libreops:matrix.org](https://riot.im/app/#/room/#libreops:matrix.org) if DNSSEC is supported by the LibreDNS service, the answer is: > [not yet , on our todo list](https://matrix.to/#/!ixcbtfIBdcPeyDEEzR:matrix.org/$161427370750989iDLZN:matrix.org?via=chat.weho.st&via=matrix.org&via=privacytools.io) Tested with the following commands: $ kdig @116.202.176.26 +tls-host=dot.libredns.gr +dnssec sigfail.verteiltesysteme.net ;; TLS session (TLS1.3)-(ECDHE-SECP256R1)-(RSA-PSS-RSAE-SHA256)-(AES-256-GCM) ;; ->>HEADER<<- opcode: QUERY; status: NOERROR; id: 8416 ;; Flags: qr rd ra; QUERY: 1; ANSWER: 2; AUTHORITY: 0; ADDITIONAL: 1 ;; EDNS PSEUDOSECTION: ;; Version: 0; flags: do; UDP size: 512 B; ext-rcode: NOERROR ;; QUESTION SECTION: ;; sigfail.verteiltesysteme.net. IN A ;; ANSWER SECTION: sigfail.verteiltesysteme.net. 42 IN A 134.91.78.139 sigfail.verteiltesysteme.net. 42 IN RRSIG A 5 3 60 20210502030010 20210131030010 30665 verteiltesysteme.net. //This+RRSIG+is+deliberately+broken///For+more+information+please+go+to/http+//www+verteiltesysteme+net///////////////////////////////////////////////////////////////////8= The status is `NOERROR` and the `AD` flags is missing but the expected status is `SERVAIL`. This unexpected behavior can be tested with another domain: ``` $ kdig @116.202.176.26 +tls-host=dot.libredns.gr +dnssec www.dnssec-failed.org ;; TLS session (TLS1.3)-(ECDHE-SECP256R1)-(RSA-PSS-RSAE-SHA256)-(AES-256-GCM) ;; ->>HEADER<<- opcode: QUERY; status: NOERROR; id: 62932 ;; Flags: qr rd ra; QUERY: 1; ANSWER: 3; AUTHORITY: 0; ADDITIONAL: 1 ;; EDNS PSEUDOSECTION: ;; Version: 0; flags: do; UDP size: 512 B; ext-rcode: NOERROR ;; QUESTION SECTION: ;; www.dnssec-failed.org. IN A ;; ANSWER SECTION: www.dnssec-failed.org. 4205 IN A 68.87.109.242 www.dnssec-failed.org. 4205 IN A 69.252.193.191 www.dnssec-failed.org. 4205 IN RRSIG A 5 3 7200 20210314145058 20210225144558 44973 dnssec-failed.org. ugoAA9teSApCHc8De+5hfxrY/BjD9LSE/fguwdMu0zcvtSF6oIS0iLIY1J94nDecv+YA8YAKC2AcRJhpEIjtaFnTKVrKvTEgr1IMjjujxk7GIGolMht+byvWzPlOf/hGZqlwykNkFRm9syu8OB5oshh/keZC0TflGNA+rUNlET8= ``` Output of the same command using providers with DNSSEC enabled: ``` $ kdig @9.9.9.9 +tls-host=dns.quad9.net sigfail.verteiltesysteme.net ;; TLS session (TLS1.3)-(ECDHE-SECP256R1)-(ECDSA-SECP256R1-SHA256)-(AES-256-GCM) ;; ->>HEADER<<- opcode: QUERY; status: SERVFAIL; id: 18459 ;; Flags: qr rd ra; QUERY: 1; ANSWER: 0; AUTHORITY: 0; ADDITIONAL: 1 ;; QUESTION SECTION: ;; sigfail.verteiltesysteme.net. IN A ``` ``` kdig @45.90.57.121 +tls-host=dot-ch.blahdns.com sigfail.verteiltesysteme.net ;; TLS session (TLS1.3)-(ECDHE-SECP256R1)-(RSA-PSS-RSAE-SHA256)-(AES-256-GCM) ;; ->>HEADER<<- opcode: QUERY; status: SERVFAIL; id: 59870 ;; Flags: qr rd ra; QUERY: 1; ANSWER: 0; AUTHORITY: 0; ADDITIONAL: 1 ;; QUESTION SECTION: ;; sigfail.verteiltesysteme.net. IN A ``` #### Check List  * Netlify preview for the mainly edited page:

lynn-stephenson (Migrated from github.com) approved these changes 2021-04-14 23:18:26 +00:00

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Reference: privacyguides/privacytools.io#2216