Request to pfSense.localdomain timed-out

johnpoz

Yeah there is a major ddos to a major dns provider going on right now. If they are hosting the authoritative servers for domains your interested in looking up then you going to have a problem.

Looking up pfsense own name has nothing to do with outside dns though. You have to have a access list to be able to query resolver. I you can not query pfsense own name, then resolver not running, your not allowed because of accesslist or you have connectivity issue or something broke in the resolver.


user@ubuntu:~$ dig pfsense.local.lan

; <<>> DiG 9.9.5-3ubuntu0.9-Ubuntu <<>> pfsense.local.lan
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4439
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;pfsense.local.lan.             IN      A

;; ANSWER SECTION:
pfsense.local.lan.      3600    IN      A       192.168.9.253

;; Query time: 2 msec
;; SERVER: 192.168.9.253#53(192.168.9.253)
;; WHEN: Fri Oct 21 11:00:03 CDT 2016
;; MSG SIZE  rcvd: 62

I pulled my local network out of the access list


user@ubuntu:~$ dig pfsense.local.lan

; <<>> DiG 9.9.5-3ubuntu0.9-Ubuntu <<>> pfsense.local.lan
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 24649
;; flags: qr rd ad; QUERY: 0, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; Query time: 1 msec
;; SERVER: 192.168.9.253#53(192.168.9.253)
;; WHEN: Fri Oct 21 11:01:21 CDT 2016
;; MSG SIZE  rcvd: 12

I upped the logging level in my resolver.


Oct 21 11:03:29 	unbound 	71253:1 	debug: refused query from ip4 192.168.9.8 port 57371 (len 16)
Oct 21 11:03:29 	unbound 	71253:1 	debug: refuse[41:0] 5C7C010000010000000000000C7361666562726F7773696E6706676F6F676C6503636F6D0000010001
Oct 21 11:03:29 	unbound 	71253:1 	debug: refused query from ip4 192.168.9.8 port 57371 (len 16)
Oct 21 11:03:29 	unbound 	71253:1 	debug: refuse[41:0] 5C7C010000010000000000000C7361666562726F7773696E6706676F6F676C6503636F6D0000010001
Oct 21 11:03:29 	unbound 	71253:1 	debug: refused query from ip4 192.168.9.8 port 57371 (len 16)
Oct 21 11:03:24 	unbound 	71253:0 	debug: refuse[50:0] 6BE4010000010000000000000F6C6F672D72747332342D69616430310764657669636573046E65737403636F6D0000010001
Oct 21 11:03:24 	unbound 	71253:0 	debug: refused query from ip4 192.168.4.96 port 47019 (len 16)

You can see it refusing queries from my local network.

Do you have this checked or unchecked?

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NOYB

For me resolver is unable to resolve at least these two domans:
github.com
twitter.com

johnpoz

yeah those are listed as two of the domains that are hosted there..

github.com. 172800 IN NS ns1.p16.dynect.net.
github.com. 172800 IN NS ns3.p16.dynect.net.
github.com. 172800 IN NS ns2.p16.dynect.net.
github.com. 172800 IN NS ns4.p16.dynect.net.

twitter.com. 172800 IN NS ns1.p34.dynect.net.
twitter.com. 172800 IN NS ns2.p34.dynect.net.
twitter.com. 172800 IN NS ns3.p34.dynect.net.
twitter.com. 172800 IN NS ns4.p34.dynect.net.

dynect.net is what is under ddos.

tushar

its unchecked no modification done on this page.

only youtube is working properly…. How to correct my dns resolver if it get corrupted

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tushar

I plugged Linksys RV042 everything working fine. just pfSense having problem unbound DNS resolving…

Any hope for broken Unbound DNS resolver or fresh install again?? :-\

JeGr

Yet again. Nothing todo with Unbound per se. Just try some different upstream DNS servers to test. I had problems a few days ago, too and adding e.g. an opendns and another local free dns server in addition to 8.8.8.8 helped solving it as even the Google DNS couldn't resolve twitter and github anymore. A few others had other cache timings etc. so could still resolve them. That helped.

Also restart/refresh unbound so it resolves the domains again and doesn't use negative caching against you.
Use "ipconfig /flushdns" as you're using windows. That caches negative DNS, too.
Not everything is simply a pfSense problem ;)

tushar

@JeGr:

Yet again. Nothing todo with Unbound per se. Just try some different upstream DNS servers to test. I had problems a few days ago, too and adding e.g. an opendns and another local free dns server in addition to 8.8.8.8 helped solving it as even the Google DNS couldn't resolve twitter and github anymore. A few others had other cache timings etc. so could still resolve them. That helped.

Also restart/refresh unbound so it resolves the domains again and doesn't use negative caching against you.
Use "ipconfig /flushdns" as you're using windows. That caches negative DNS, too.
Not everything is simply a pfSense problem ;)

i did what you said still same. check screenshots what settings i do more….

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johnpoz

Ya think maybe your pfblocker dns might have something to do it it ;)

lets go over this again.. Can you query pfsense own name from something on your network?

example

dig pfsense.local.lan

; <<>> DiG 9.11.0 <<>> pfsense.local.lan
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51432
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;pfsense.local.lan. IN A

;; ANSWER SECTION:
pfsense.local.lan. 3600 IN A 192.168.9.253

;; Query time: 1 msec
;; SERVER: 192.168.9.253#53(192.168.9.253)
;; WHEN: Mon Oct 24 06:24:07 Central Daylight Time 2016
;; MSG SIZE rcvd: 62

nslookup pfsense.local.lan
Server: pfsense.local.lan
Address: 192.168.9.253

Name: pfsense.local.lan
Addresses: 2001:470:snipped::1
192.168.9.253

tushar

Yes Sir,

lubuntu@lubuntu:~$ dig pfsense.local.lan

; <<>> DiG 9.10.3-P4-Ubuntu <<>> pfsense.local.lan
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 7057
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;pfsense.local.lan.		IN	A

;; AUTHORITY SECTION:
.			3559	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2016102400 1800 900 604800 86400

;; Query time: 46 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Mon Oct 24 17:03:25 IST 2016
;; MSG SIZE  rcvd: 121

lubuntu@lubuntu:~$ dig pfsense.local.lan

; <<>> DiG 9.10.3-P4-Ubuntu <<>> pfsense.local.lan
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 11851
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;pfsense.local.lan.		IN	A

;; AUTHORITY SECTION:
.			3499	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2016102400 1800 900 604800 86400

;; Query time: 0 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Mon Oct 24 17:08:44 IST 2016
;; MSG SIZE  rcvd: 121

lubuntu@lubuntu:~$ nslookup pfsense.local.lan
Server:		127.0.1.1
Address:	127.0.1.1#53

** server can't find pfsense.local.lan: NXDOMAIN

See only youtube working very fine only….

lubuntu@lubuntu:~$ dig www.youtube.com

; <<>> DiG 9.10.3-P4-Ubuntu <<>> www.youtube.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42624
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.youtube.com.		IN	A

;; ANSWER SECTION:
www.youtube.com.	86385	IN	CNAME	youtube-ui.l.google.com.
youtube-ui.l.google.com. 286	IN	A	216.58.220.206

;; Query time: 0 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Mon Oct 24 17:25:42 IST 2016
;; MSG SIZE  rcvd: 94

johnpoz

And u are doing query to loopback 127.0.1.1 not pfsense where is ur linix box sending tahat query?

tushar

@johnpoz:

And u are doing query to loopback 127.0.1.1 not pfsense where is ur linix box sending tahat query?

; <<>> DiG 9.10.3-P4-Ubuntu <<>> pfsense.localdomain
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19430
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;pfsense.localdomain.		IN	A

;; ANSWER SECTION:
pfsense.localdomain.	3600	IN	A	192.168.2.1

;; Query time: 0 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Mon Oct 24 20:43:19 IST 2016
;; MSG SIZE  rcvd: 64

lubuntu@lubuntu:~$ nslookup pfsense.localdomain
Server:		127.0.1.1
Address:	127.0.1.1#53

Name:	pfsense.localdomain
Address: 192.168.2.1

Small correction pfsense.localdomain not pfsense.local.lan. This is all what i get dig output, using same configuration since 16days no reboot. suddenly stopped resolving hostnames, somehow only youtube working fine without any problem.

should i need to specify dns ip also - System/General Setup/ DNS Server setting

also using some packages like SNORT, pfblockerNG, squid proxy transparent mode. ClamAV.

johnpoz

U need to query pfsense directly with ur dig command because where is linux actualy sending that quer? U are doing query to itself

tushar

i dont know why 127.0.0.1 unbound unable to resolve domain names. only youtube working. Do i need to update some kind of cache of unbound DNS?

johnpoz

Well ur linux box is most likly not asking pfsemse

tushar

any idea what i do now, because 127.0.0.1 not resolving domains…..... DNS look also keep searching but nothing

NOTE:-- tested this - when i do DNS Query Forwarding - Enabled and put google DNS 8.8.8.8 in System/General setup eveything works normal. But before that i use to keep uncheck DNS Query and no DNS in System/General everything just works fine....

johnpoz

dude so when you query the pfsense directly??

dig @pfsenseIP pfsense.localdomainname.tld

does that respond or not?

On pfsense using the resolver and pointing to itself, can it resolve other domains?

Your problem is your linux is asking some service running local, that does what? does it forward to what?

Its possible pfsense resolver is having an issue talking to roots and the authoritative ns. But it should be able to resolve its own name when asked by itself or other clients

Its also possible you just don't have an Accesslist that allows your client to even query pfsense for anything that the resolver can resolve either your own local names or host overrides or outside.

pfsensednslookup.jpg_thumb

tushar

; <<>> DiG 9.10.3-P4-Ubuntu <<>> pfsense.localdomain
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1336
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;pfsense.localdomain.		IN	A

;; ANSWER SECTION:
pfsense.localdomain.	3600	IN	A	192.168.2.1

;; Query time: 0 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Tue Oct 25 01:37:58 IST 2016
;; MSG SIZE  rcvd: 64

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johnpoz

ok so you can query pfsense local name, and you can query some domains.

You need to figure out why you can not query those… Set up your debug level in unbound and try the queries again and see what it says?

Do a query direct to the ns for facebook.com

dig @a.ns.facebook.com www.facebook.com

; <<>> DiG 9.11.0 <<>> @a.ns.facebook.com www.facebook.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 64707
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 4
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;www.facebook.com. IN A

;; ANSWER SECTION:
www.facebook.com. 3600 IN CNAME star-mini.c10r.facebook.com.

;; AUTHORITY SECTION:
facebook.com. 172800 IN NS a.ns.facebook.com.
facebook.com. 172800 IN NS b.ns.facebook.com.

;; ADDITIONAL SECTION:
a.ns.facebook.com. 172800 IN AAAA 2a03:2880:fffe:c:face:b00c:0:35
a.ns.facebook.com. 172800 IN A 69.171.239.12
b.ns.facebook.com. 172800 IN AAAA 2a03:2880:ffff:c:face:b00c:0:35
b.ns.facebook.com. 172800 IN A 69.171.255.12

;; Query time: 15 msec
;; SERVER: 69.171.239.12#53(69.171.239.12)
;; WHEN: Mon Oct 24 17:30:50 Central Daylight Time 2016
;; MSG SIZE rcvd: 186

Maybe your having ipv6 issues? Maybe your isp is doing something with your dns queries?

Do a +trace with did to see what might be failing? the resolver works completely different than forwarding. You walk the tree down from roots too the authoritative server. If your internet connection has problems to these authoritative servers then you can have issues.

Change over to the forwarder if your having issues with resolving, or put the resolver in forwarder mode - most likely have to turn off dnssec if where you forward doesn't support it.

tushar

; <<>> DiG 9.10.3-P4-Ubuntu <<>> www.facebook.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 42715
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.facebook.com.		IN	A

;; Query time: 0 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Tue Oct 25 10:32:57 IST 2016
;; MSG SIZE  rcvd: 45

lubuntu@lubuntu:~$ traceroute www.facebook.com
www.facebook.com: Temporary failure in name resolution
Cannot handle "host" cmdline arg `www.facebook.com' on position 1 (argc 1)

lubuntu@lubuntu:~$ traceroute www.google.com
traceroute to www.google.com (216.58.220.196), 30 hops max, 60 byte packets
 1  pfSense.localdomain (192.168.2.1)  0.227 ms  0.248 ms  0.156 ms
 2  192.168.1.1 (192.168.1.1)  2.080 ms  2.485 ms  2.654 ms
 3  103.30.141.1 (103.30.141.1)  33.453 ms  33.419 ms  33.363 ms
 4  172.25.24.66 (172.25.24.66)  33.535 ms  50.011 ms  49.956 ms
 5  172.25.24.17 (172.25.24.17)  49.919 ms  49.871 ms  49.848 ms
 6  172.25.24.78 (172.25.24.78)  49.344 ms  48.722 ms  49.034 ms
 7  103.14.124.125 (103.14.124.125)  48.936 ms  47.614 ms  47.483 ms
 8  108.170.238.13 (108.170.238.13)  46.678 ms  37.054 ms  36.928 ms
 9  216.58.220.196 (216.58.220.196)  36.913 ms  18.125 ms  18.031 ms
lubuntu@lubuntu:~$

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tushar

devs any idea about this why im not able to resolve domains, only youtube and google.com working fine?