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    23.01 Unable to answer DNS queries after upgrade

    Scheduled Pinned Locked Moved General pfSense Questions
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    • Bob.DigB
      Bob.Dig LAYER 8 @thebear
      last edited by

      @thebear For the record, manually creating an ACL solves the problem but it shouldn't be necessary to begin with.

      T 1 Reply Last reply Reply Quote 0
      • T
        thebear @Bob.Dig
        last edited by

        @bob-dig why? I also needed to add a IPv6 ACL next to my IPv4 ACL I got with 22.05. Somehow the behavior has changed with 23.01.

        Without the ACL's, where is the allow all option? If that not exists then the ACL is needed, right?

        Bob.DigB 1 Reply Last reply Reply Quote 0
        • Bob.DigB
          Bob.Dig LAYER 8 @thebear
          last edited by

          @thebear said in 23.01 Unable to answer DNS queries after upgrade:

          Without the ACL's, where is the allow all option?

          Here it is:
          Capture.PNG

          T 1 Reply Last reply Reply Quote 0
          • T
            thebear @Bob.Dig
            last edited by

            @bob-dig Yeah I know, without the boxes checked pfSense should add the auto rules to unbound right?

            And you confirming, my experiences, that is starts working after adding a manual IPv6 ACL.

            Get my point there might be a bug involved in the default/auto ACL's for IPv6?

            T 1 Reply Last reply Reply Quote 0
            • T
              thebear @thebear
              last edited by thebear

              Here is the proof, without ACL's IPv4 remains functional and IPv6 stops.

              status: REFUSED

              ~ % dig @172.16.1.1 forum.netgate.com

; <<>> DiG 9.10.6 <<>> @172.16.1.1 forum.netgate.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57847
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1432
;; QUESTION SECTION:
;forum.netgate.com.		IN	A

;; ANSWER SECTION:
forum.netgate.com.	1485	IN	A	208.123.73.199

;; Query time: 134 msec
;; SERVER: 172.16.1.1#53(172.16.1.1)
;; WHEN: Thu Feb 16 11:18:34 CET 2023
;; MSG SIZE  rcvd: 62

              ~ % dig forum.netgate.com

; <<>> DiG 9.10.6 <<>> forum.netgate.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 58561
;; flags: qr rd ad; QUERY: 0, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; Query time: 43 msec
;; SERVER: 2a02:a469:<cut>#53(2a02:a469:<cut>)
;; WHEN: Thu Feb 16 11:18:40 CET 2023
;; MSG SIZE  rcvd: 12

              With the ACL added:

               ~ % dig forum.netgate.com

; <<>> DiG 9.10.6 <<>> forum.netgate.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44698
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1432
;; QUESTION SECTION:
;forum.netgate.com.		IN	A

;; ANSWER SECTION:
forum.netgate.com.	1267	IN	A	208.123.73.199

;; Query time: 41 msec
;; SERVER: 2a02:a469:435b:<cut>#53(2a02:a469:<cut>)
;; WHEN: Thu Feb 16 11:22:13 CET 2023
;; MSG SIZE  rcvd: 62
              Bob.DigB 1 Reply Last reply Reply Quote 1
              • Bob.DigB
                Bob.Dig LAYER 8 @thebear
                last edited by Bob.Dig

                @thebear I thought it would only be a "bug" with ULA but yours even look like a GUA.

                T 1 Reply Last reply Reply Quote 0
                • T
                  thebear @Bob.Dig
                  last edited by thebear

                  @bob-dig said in 23.01 Unable to answer DNS queries after upgrade:

                  @thebear I thought it would only be a "bug" with ULA but yours even look like a GUA.

                  Indeed. Glad we came to the same conclusion.

                  1 Reply Last reply Reply Quote 0
                  • stephenw10S
                    stephenw10 Netgate Administrator
                    last edited by

                    So to be clear you did not need those ACLs in 22.05? The auto added ACLs were passing v6 queries there?

                    Steve

                    T Bob.DigB 2 Replies Last reply Reply Quote 0
                    • T
                      thebear @stephenw10
                      last edited by

                      @stephenw10 well as IT expert you change a lot every week, I think the short answer is yes. We did not need the extra v6 ACL to get the IPv6 DNS queries flowing.

                      If you want I can BE boot to an older release tot verify, need to wait until later tonight.

                      1 Reply Last reply Reply Quote 0
                      • Bob.DigB
                        Bob.Dig LAYER 8 @stephenw10
                        last edited by

                        @stephenw10 I even had dns problems in Windows, it would prefer the IPv6 that is given by pfSense and then it doesn't worked. Only because of the DNS problem in Windows I had to look closer.
                        Later Windows switched to the IPv4 and DNS worked again "on its own". But I never encountered that problem before so my guess is, it must have worked before. And again, pfSense is giving this address... its interface address. Like seen here.

                        1 Reply Last reply Reply Quote 0
                        • stephenw10S
                          stephenw10 Netgate Administrator
                          last edited by

                          Ok, I'll try to replicate it.

                          1 Reply Last reply Reply Quote 1
                          • jimpJ
                            jimp Rebel Alliance Developer Netgate
                            last edited by

                            We've had a couple threads with similar reports but I've never been able to trigger it in my lab. It could be a timing issue where at the moment it collects the networks for the ACLs they aren't on the interface (yet?) but then they appear later, but there is no interface event when the delegated prefix gets added to the LAN(s) so Unbound doesn't restart after to pick up the change in ACLs.

                            No amount of fiddling with options is likely to have any more impact than simply saving in Unbound without changing anything, triggering it to rewrite its config files.

                            Remember: Upvote with the 👍 button for any user/post you find to be helpful, informative, or deserving of recognition!

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                            Bob.DigB 1 Reply Last reply Reply Quote 0
                            • Bob.DigB
                              Bob.Dig LAYER 8 @jimp
                              last edited by Bob.Dig

                              @jimp Is this regarding to OP or "to the rest", because OPs problem is gone as far as I can see.
                              For me I have ULAs so no delegated prefix at all and unbound still only allows IPv4. Also I am rebooting my pfSense on a daily bases via cron. Restarting Unbound doesn't solves this. If it helps you could move my thread in an active forum.

                              1 Reply Last reply Reply Quote 0
                              • jimpJ
                                jimp Rebel Alliance Developer Netgate
                                last edited by

                                Adding a manual ACL works around the issue but it doesn't solve the root cause of the problem.

                                By default the IPv4 and IPv6 networks of all local (non-WAN) interfaces used by Unbound should be allowed through Unbound. If the list is incomplete in some way then the networks were not on the interface when the Unbound config was generated.

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                                Bob.DigB 1 Reply Last reply Reply Quote 0
                                • Bob.DigB
                                  Bob.Dig LAYER 8 @jimp
                                  last edited by

                                  @jimp I will delete it manually if you tell a windows noob where to find it, I have not that much options set.

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                                  • jimpJ
                                    jimp Rebel Alliance Developer Netgate
                                    last edited by

                                    The ACLs are in /var/unbound/access_lists.conf so that's where I'd look.

                                    Even with your manual ACL entry the automatic ones will still be there.

                                    Anyone who sees this should check the file before touching anything else and then again after restarting Unbound to see if there is a difference.

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                                    T Bob.DigB 2 Replies Last reply Reply Quote 0
                                    • T
                                      thebear @jimp
                                      last edited by thebear

                                      @jimp

                                      It seems only the loopbacks are in the auto config. I'm using DHCP-PD for my LAN.

                                      With my manual IPv6 ACL

                                      [23.01-RELEASE][admin@pfSense.high.local]/root: cat /var/unbound/access_lists.conf
access-control: 127.0.0.1/32 allow_snoop
access-control: ::1 allow_snoop
access-control: 10.10.10.0/24 allow
access-control: 10.81.240.0/22 allow
access-control: 10.110.1.0/24 allow
access-control: 10.110.2.0/24 allow
access-control: 127.0.0.0/8 allow
access-control: 172.16.1.0/24 allow
access-control: 172.16.2.0/24 allow
access-control: 172.16.6.0/24 allow
access-control: 172.16.7.0/24 allow
access-control: 172.16.8.0/24 allow
access-control: 172.16.26.0/24 allow
access-control: 172.16.27.0/24 allow
access-control: ::1/128 allow
#WireGuard
access-control: 10.10.10.0/24 allow
#IPv6
access-control: 2a02:a469:<cut>::/48 allow

                                      With the default auto generated ACL where the DNS request at the IPv6 address are REFUSED.

                                      [23.01-RELEASE][admin@pfSense.high.local]/root: cat /var/unbound/access_lists.conf
access-control: 127.0.0.1/32 allow_snoop
access-control: ::1 allow_snoop
access-control: 10.10.10.0/24 allow
access-control: 10.81.240.0/22 allow
access-control: 10.110.1.0/24 allow
access-control: 10.110.2.0/24 allow
access-control: 127.0.0.0/8 allow
access-control: 172.16.1.0/24 allow
access-control: 172.16.2.0/24 allow
access-control: 172.16.6.0/24 allow
access-control: 172.16.7.0/24 allow
access-control: 172.16.8.0/24 allow
access-control: 172.16.26.0/24 allow
access-control: 172.16.27.0/24 allow
access-control: ::1/128 allow
#WireGuard
access-control: 10.10.10.0/24 allow
                                      jimpJ 1 Reply Last reply Reply Quote 0
                                      • jimpJ
                                        jimp Rebel Alliance Developer Netgate @thebear
                                        last edited by

                                        @thebear So your LAN interface(s) use track6 and get allocations from a DHCPv6 WAN?

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                                        T 1 Reply Last reply Reply Quote 0
                                        • T
                                          thebear @jimp
                                          last edited by thebear

                                          @jimp yes

                                          EDIT extra info regarding the WAN its PPPoE @jimp

                                          ad037f2f-62d2-4d6e-b904-c99c1b0bcac4-image.png

                                          0fb28b48-4cfe-4eed-a397-73aa3421cbdc-image.png

                                          043a3721-67e6-4d94-97a3-bf05738f70e6-image.png

                                          via unmanged SLAAC
                                          c4bcb2b6-c592-4785-b0c4-cf891c0ad63a-image.png

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                                          • Bob.DigB
                                            Bob.Dig LAYER 8 @jimp
                                            last edited by

                                            @jimp said in 23.01 Unable to answer DNS queries after upgrade:

                                            The ACLs are in /var/unbound/access_lists.conf so that's where I'd look.

                                            Yes but that was already done in some other threads around this problem. I am willing to delete my whole resolver config if it helps.

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