Domains können nicht aufgelöst werden

3gwvqb543w · March 4, 2019, 6:39pm

Hallo,
mein server löst keine internen domain anfragen auf (bspw. apt-get update), lediglich externe.

Fehl:1 http://security.debian.org stretch/updates InRelease
Temporärer Fehlschlag beim Auflösen von »security.debian.org«
Fehl:2 Index of /debian stretch InRelease
Temporärer Fehlschlag beim Auflösen von »deb.debian.org«
Fehl:3 Index of /debian stretch-updates InRelease
Temporärer Fehlschlag beim Auflösen von »deb.debian.org«
Paketlisten werden gelesen... Fertig
W: Fehlschlag beim Holen von http://deb.debian.org/debian/dists/stretch/InRelease Temporärer Fehlschlag beim Auflösen von »deb.debian.org«
W: Fehlschlag beim Holen von http://security.debian.org/dists/stretch/updates/InRelease Temporärer Fehlschlag beim Auflösen von »security.debian.org«
W: Fehlschlag beim Holen von http://deb.debian.org/debian/dists/stretch-updates/InRelease Temporärer Fehlschlag beim Auflösen von »deb.debian.org«
W: Einige Indexdateien konnten nicht heruntergeladen werden. Sie wurden ignoriert oder alte an ihrer Stelle benutzt.

Eine Idee dazu?
debug token kann nicht hochgeladen werden (fehler beim hochladen).

lg

jfb · March 4, 2019, 7:08pm

Output of dig deb.debian.org and dig security.debian.org ?

3gwvqb543w · March 4, 2019, 11:53pm

dig debian.org

Zusammenfassung

; <<>> DiG 9.10.3-P4-Debian <<>> deb.debian.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15375
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 13
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;deb.debian.org. IN A

;; AUTHORITY SECTION:
org. 172800 IN NS a0.org.afilias-nst.info.
org. 172800 IN NS a2.org.afilias-nst.info.
org. 172800 IN NS b0.org.afilias-nst.org.
org. 172800 IN NS b2.org.afilias-nst.org.
org. 172800 IN NS c0.org.afilias-nst.info.
org. 172800 IN NS d0.org.afilias-nst.org.

;; ADDITIONAL SECTION:
a0.org.afilias-nst.info. 172800 IN A 199.19.56.1
a2.org.afilias-nst.info. 172800 IN A 199.249.112.1
b0.org.afilias-nst.org. 172800 IN A 199.19.54.1
b2.org.afilias-nst.org. 172800 IN A 199.249.120.1
c0.org.afilias-nst.info. 172800 IN A 199.19.53.1
d0.org.afilias-nst.org. 172800 IN A 199.19.57.1
a0.org.afilias-nst.info. 172800 IN AAAA 2001:500:e::1
a2.org.afilias-nst.info. 172800 IN AAAA 2001:500:40::1
b0.org.afilias-nst.org. 172800 IN AAAA 2001:500:c::1
b2.org.afilias-nst.org. 172800 IN AAAA 2001:500:48::1
c0.org.afilias-nst.info. 172800 IN AAAA 2001:500:b::1
d0.org.afilias-nst.org. 172800 IN AAAA 2001:500:f::1

;; Query time: 3 msec
;; SERVER: 193.0.14.129#53(193.0.14.129)
;; WHEN: Tue Mar 05 00:50:16 CET 2019
;; MSG SIZE rcvd: 445

dig security.debian.org

Zusammenfassung

; <<>> DiG 9.10.3-P4-Debian <<>> security.debian.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19314
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 13
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;security.debian.org. IN A

;; AUTHORITY SECTION:
org. 172800 IN NS a0.org.afilias-nst.info.
org. 172800 IN NS a2.org.afilias-nst.info.
org. 172800 IN NS b0.org.afilias-nst.org.
org. 172800 IN NS b2.org.afilias-nst.org.
org. 172800 IN NS c0.org.afilias-nst.info.
org. 172800 IN NS d0.org.afilias-nst.org.

;; ADDITIONAL SECTION:
a0.org.afilias-nst.info. 172800 IN A 199.19.56.1
a2.org.afilias-nst.info. 172800 IN A 199.249.112.1
b0.org.afilias-nst.org. 172800 IN A 199.19.54.1
b2.org.afilias-nst.org. 172800 IN A 199.249.120.1
c0.org.afilias-nst.info. 172800 IN A 199.19.53.1
d0.org.afilias-nst.org. 172800 IN A 199.19.57.1
a0.org.afilias-nst.info. 172800 IN AAAA 2001:500:e::1
a2.org.afilias-nst.info. 172800 IN AAAA 2001:500:40::1
b0.org.afilias-nst.org. 172800 IN AAAA 2001:500:c::1
b2.org.afilias-nst.org. 172800 IN AAAA 2001:500:48::1
c0.org.afilias-nst.info. 172800 IN AAAA 2001:500:b::1
d0.org.afilias-nst.org. 172800 IN AAAA 2001:500:f::1

;; Query time: 3 msec
;; SERVER: 193.0.14.129#53(193.0.14.129)
;; WHEN: Tue Mar 05 00:51:46 CET 2019
;; MSG SIZE rcvd: 450

regards

3gwvqb543w · March 5, 2019, 12:13am

die auflösung funktioniert nur wenn ich mittels sudo nano /etc/resolv.conf den nameserver von 127.0.0.1 auf bspw. 9.9.9.9 ändere, was natürlich nach einen reboot wieder geändert wird.

jfb · March 5, 2019, 12:19am

Were the dig commands run after changing the nameserver or while the nameserver was set to 127.0.0.1? It appears that the digs went to Pi-Hole for resolution, so this does not appear to be the case.

The dig commands properly resolved both addresses.

Edit - I missed this on first look. They did not return the correct addresses for the requested domains, but returned the addresses of the .org name servers.

3gwvqb543w · March 5, 2019, 12:23am

while the nameserver was set to 127.0.0.1
debug log AFTER i changed to 9.9.9.9
https://tricorder.pi-hole.net/nagfzljbcm

jfb · March 5, 2019, 12:36am

Your debug log shows that Pi-Hole is functioning correctly:

*** [ DIAGNOSING ]: Name resolution (IPv4) using a random blocked domain and a known ad-serving domain
[âœ“] bob537.web3000.com is 92.60.37.79 via localhost (127.0.0.1)
[âœ“] bob537.web3000.com is 92.60.37.79 via Pi-hole (92.60.37.79)
[âœ“] doubleclick.com is 172.217.22.78 via a remote, public DNS server (8.8.8.8)

   [2019-03-05 01:02:58.714 11763] Imported 18810 queries from the long-term database
   [2019-03-05 01:02:58.714 11763]  -> Total DNS queries: 18810
   [2019-03-05 01:02:58.714 11763]  -> Cached DNS queries: 861
   [2019-03-05 01:02:58.714 11763]  -> Forwarded DNS queries: 17512
   [2019-03-05 01:02:58.714 11763]  -> Exactly blocked DNS queries: 433
   [2019-03-05 01:02:58.714 11763]  -> Unknown DNS queries: 4
   [2019-03-05 01:02:58.714 11763]  -> Unique domains: 758
   [2019-03-05 01:02:58.714 11763]  -> Unique clients: 10
   [2019-03-05 01:02:58.714 11763]  -> Known forward destinations: 7

3gwvqb543w · March 5, 2019, 12:41am

i dont get it.
Nameserver changed to 127.0.0.1
apt-get update shows this:

Zusammenfassung

Fehl:1 http://security.debian.org stretch/updates InRelease
Temporärer Fehlschlag beim Auflösen von »security.debian.org«
Fehl:2 Index of /debian stretch InRelease
Temporärer Fehlschlag beim Auflösen von »deb.debian.org«
Fehl:3 Index of /debian stretch-updates InRelease
Temporärer Fehlschlag beim Auflösen von »deb.debian.org«
Paketlisten werden gelesen... Fertig
W: Fehlschlag beim Holen von http://deb.debian.org/debian/dists/stretch/InRelease Temporärer Fehlschlag beim Auflösen von »deb.debian.org«
W: Fehlschlag beim Holen von http://security.debian.org/dists/stretch/updates/InRelease Temporärer Fehlschlag beim Auflösen von »security.debian.org«
W: Fehlschlag beim Holen von http://deb.debian.org/debian/dists/stretch-updates/InRelease Temporärer Fehlschlag beim Auflösen von »deb.debian.org«
W: Einige Indexdateien konnten nicht heruntergeladen werden. Sie wurden ignoriert oder alte an ihrer Stelle benutzt.

Nameserver changed to 9.9.9.9
apt-get update shows this:

Zusammenfassung

OK:1 http://security.debian.org stretch/updates InRelease
Ign:2 Index of /debian stretch InRelease
OK:3 Index of /debian stretch-updates InRelease
OK:4 Index of /debian stretch Release
Paketlisten werden gelesen... Fertig

Nameserver changed to 193.0.14.129 (which is also my upstream provider and one of the master root nameservers -> k.root-servers.net)
apt-get update shows this:

Zusammenfassung

Ign:1 http://security.debian.org stretch/updates InRelease
Ign:2 Index of /debian stretch InRelease
Fehl:3 http://security.debian.org stretch/updates Release
Beim Auflösen von »security.debian.org:http« ist etwas Schlimmes passiert (-5 - Zu diesem Hostnamen gehört keine Adresse).
Ign:4 Index of /debian stretch-updates InRelease
Fehl:5 Index of /debian stretch Release
Beim Auflösen von »deb.debian.org:http« ist etwas Schlimmes passiert (-5 - Zu diesem Hostnamen gehört keine Adresse).
Fehl:6 Index of /debian stretch-updates Release
Beim Auflösen von »deb.debian.org:http« ist etwas Schlimmes passiert (-5 - Zu diesem Hostnamen gehört keine Adresse).
Paketlisten werden gelesen... Fertig
E: The repository 'http://security.debian.org stretch/updates Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'Index of /debian stretch Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'Index of /debian stretch-updates Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

All of the above mentioned nameservers are suporting dnssec.

regards

3gwvqb543w · March 5, 2019, 12:50am

must be a problem with the upstream providers.
If im changing them back to dns.watch everything is working fine also with sudo nano /etc/resolv.conf set to 127.0.0.1
Any ideas why this is happening?

jfb · March 5, 2019, 1:05am

I was mistaken in my earlier reply where I said the digs were returning correctly. They were not.

Why are you using the root servers for your upstream DNS? This is not a recursive DNS resolver; it is only able to tell you the domain name servers for the TLDs - .com, .org, etc... From there, a recursive resolver will in turn query the domain servers in descending order to find out the IP of the domain requested. Good description here:

dig security.debian.org to a recursive resolver shows:

dig security.debian.org

; <<>> DiG 9.10.3-P4-Raspbian <<>> security.debian.org
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42155
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 3, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1472
;; QUESTION SECTION:
;security.debian.org.		IN	A

;; ANSWER SECTION:
security.debian.org.	3600	IN	A	128.61.240.73
security.debian.org.	3600	IN	A	149.20.4.14
security.debian.org.	3600	IN	A	128.31.0.63

;; AUTHORITY SECTION:
security.debian.org.	28800	IN	NS	geo2.debian.org.
security.debian.org.	28800	IN	NS	geo3.debian.org.
security.debian.org.	28800	IN	NS	geo1.debian.org.

;; Query time: 633 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon Mar 04 18:57:04 CST 2019
;; MSG SIZE  rcvd: 153

Same dig to the k root server shows a completely different answer; because the root server cannot resolve the entire domain name, it can only provide the addresses of the .org domain name servers, which are the IP addreses returned

dig security.debian.org @192.36.148.17

; <<>> DiG 9.10.3-P4-Raspbian <<>> security.debian.org @192.36.148.17
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 33425
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 13
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;security.debian.org.		IN	A

;; AUTHORITY SECTION:
org.			172800	IN	NS	c0.org.afilias-nst.info.
org.			172800	IN	NS	a2.org.afilias-nst.info.
org.			172800	IN	NS	b2.org.afilias-nst.org.
org.			172800	IN	NS	d0.org.afilias-nst.org.
org.			172800	IN	NS	b0.org.afilias-nst.org.
org.			172800	IN	NS	a0.org.afilias-nst.info.

;; ADDITIONAL SECTION:
a0.org.afilias-nst.info. 172800	IN	A	199.19.56.1
a0.org.afilias-nst.info. 172800	IN	AAAA	2001:500:e::1
a2.org.afilias-nst.info. 172800	IN	A	199.249.112.1
a2.org.afilias-nst.info. 172800	IN	AAAA	2001:500:40::1
b0.org.afilias-nst.org.	172800	IN	A	199.19.54.1
b0.org.afilias-nst.org.	172800	IN	AAAA	2001:500:c::1
b2.org.afilias-nst.org.	172800	IN	A	199.249.120.1
b2.org.afilias-nst.org.	172800	IN	AAAA	2001:500:48::1
c0.org.afilias-nst.info. 172800	IN	A	199.19.53.1
c0.org.afilias-nst.info. 172800	IN	AAAA	2001:500:b::1
d0.org.afilias-nst.org.	172800	IN	A	199.19.57.1
d0.org.afilias-nst.org.	172800	IN	AAAA	2001:500:f::1

;; Query time: 71 msec
;; SERVER: 192.36.148.17#53(192.36.148.17)
;; WHEN: Mon Mar 04 18:53:20 CST 2019
;; MSG SIZE  rcvd: 450

So, get rid of any root servers as upstream resolvers. You must use recursive resolvers, not authoritative name servers.

3gwvqb543w · March 5, 2019, 10:47am

Thank you very much.
I found out today by my own too, i was too sleepy yesterday.
Thanks @jfb

system · March 26, 2019, 10:47am

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