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    23.01 Unable to answer DNS queries after upgrade

    Scheduled Pinned Locked Moved General pfSense Questions
    29 Posts 6 Posters 4.9k Views
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    • 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.

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

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                        Do not Chat/PM for help!

                        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.

                          1 Reply Last reply Reply Quote 0
                          • 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.

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

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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?

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

                                Need help fast? Netgate Global Support!

                                Do not Chat/PM for help!

                                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

                                  1 Reply Last reply Reply Quote 0
                                  • 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.

                                    1 Reply Last reply Reply Quote 0
                                    • T thebear referenced this topic on
                                    • Bob.DigB
                                      Bob.Dig LAYER 8
                                      last edited by

                                      There is a working fix here.

                                      1 Reply Last reply Reply Quote 0
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