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    DNS Resolver

    Scheduled Pinned Locked Moved 2.2 Snapshot Feedback and Problems - RETIRED
    186 Posts 44 Posters 142.4k Views
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    • P
      phil.davis
      last edited by

      The client will have tried server.vpn and server.vpn.local on your behalf. So the server sees 2 different requests.
      My pfSenses have their domain as the same as our internal Windows Server AD domain - e.g. internal.mycompany.com - and then a domain override to point internal.mycompany.com to the nearest Active Directory DNS Server.

      Having just 1 internal domain will also resolve the issue you see - at the moment you have a ".vpn" domain and a ".local"domain happening. Then your domain override will be for the domain that pfSense itself is in.

      As the Greek philosopher Isosceles used to say, "There are 3 sides to every triangle."
      If I helped you, then help someone else - buy someone a gift from the INF catalog http://secure.inf.org/gifts/usd/

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      • A
        amunrara
        last edited by

        working fine for me

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        • M
          mattbunce
          last edited by

          Hmm - strange. I have had to use Phil's trick of directing the server.vpn.local requests to a non-existant server and then letting the server.vpn request go to the correct server. Without this I couldn't avoid the public DNS server being queried.

          Maybe the issue is that I am not using AD? amunrara could you describe your set-up?

          M

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          • N
            nzimmers
            last edited by

            I'm a pretty novice user but wanted to provide some feedback and see if there are any suggestions.  I'm currently using 2.2-BETA (i386) built on Thu Dec 04 08:23:23 CST 2014

            when I check Status->Services  several times in a row I see Unbound DNS Resolver running and stopped at various times so it seems like it's constantly stopping and restarting.

            in the general setup, I have Allow "DNS server list to be overridden by DHCP/PPP on WAN" unchecked and "Do not use the DNS Forwarder as a DNS server for the firewall" checked.

            not sure if I have something configured wrong…..

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            • H
              Hugovsky
              last edited by

              Check the posts near the end of previous page. Might be your issue.

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              • MikeV7896M
                MikeV7896
                last edited by

                @Hugovsky:

                Check the posts near the end of previous page. Might be your issue.

                Specifically, this one…

                https://forum.pfsense.org/index.php?topic=78356.msg464921#msg464921

                The S in IOT stands for Security

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                • X
                  xbipin
                  last edited by

                  i started using the new dns resolver but im having one issue, i have set to reset the pppoe connection ever night so when this happens, unbound stops working, i get these errors in system log continuously

                  Dec 11 09:44:44 	unbound: [7669:0] error: can't bind socket: Can't assign requested address
Dec 11 09:44:44 	unbound: [7669:0] debug: failed address 92.98.234.229 port 61031
Dec 11 09:44:44 	unbound: [7669:0] error: can't bind socket: Can't assign requested address
Dec 11 09:44:44 	unbound: [7669:0] debug: failed address 92.98.234.229 port 19660
Dec 11 09:44:44 	unbound: [7669:0] error: can't bind socket: Can't assign requested address
Dec 11 09:44:44 	unbound: [7669:0] debug: failed address 92.98.234.229 port 26847
Dec 11 09:44:44 	unbound: [7669:0] error: can't bind socket: Can't assign requested address
Dec 11 09:44:44 	unbound: [7669:0] debug: failed address 92.98.234.229 port 26531
Dec 11 09:44:44 	unbound: [7669:0] error: can't bind socket: Can't assign requested address
Dec 11 09:44:44 	unbound: [7669:0] debug: failed address 92.98.234.229 port 65308
Dec 11 09:44:44 	unbound: [7669:0] error: can't bind socket: Can't assign requested address
Dec 11 09:44:44 	unbound: [7669:0] debug: failed address 92.98.234.229 port 19113
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                  • R
                    router_wang
                    last edited by

                    Does the resolver also handle IPv6 dns requests?

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                    • C
                      cmb
                      last edited by

                      @router_wang:

                      Does the resolver also handle IPv6 dns requests?

                      Of course.

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                      • N
                        NobodyHere
                        last edited by

                        We're running the December 10th build. I can confirm issues with a new WAN address breaking unbound. When our PPPoE WAN link gets a new IP address, the resolver will reply with internal IPs set via DHCP clientIDs, but any external DNS lookup made via a system on the LAN fails.

                        DNS resolving on the firewall continues to work, so it's clearly an issue with unbound.

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                        • C
                          cmb
                          last edited by

                          @NobodyHere:

                          We're running the December 10th build. I can confirm issues with a new WAN address breaking unbound. When our PPPoE WAN link gets a new IP address, the resolver will reply with internal IPs set via DHCP clientIDs, but any external DNS lookup made via a system on the LAN fails.

                          DNS resolving on the firewall continues to work, so it's clearly an issue with unbound.

                          https://redmine.pfsense.org/issues/4095

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                          • N
                            NobodyHere
                            last edited by

                            I'm not sure what a message consisting solely of a link to a similar bug report means…

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                            • P
                              phil.davis
                              last edited by

                              @NobodyHere:

                              I'm not sure what a message consisting solely of a link to a similar bug report means…

                              I think cmb means "it is a known issue and there is a bug report for it".
                              It does really need fixing - as you have described, DNS resolution can stop working on a WAN DHCP address change, if you have an "unfortunate" combination of Unbound in forwarder mode… settings.

                              As the Greek philosopher Isosceles used to say, "There are 3 sides to every triangle."
                              If I helped you, then help someone else - buy someone a gift from the INF catalog http://secure.inf.org/gifts/usd/

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                              • C
                                cmb
                                last edited by

                                @phil.davis:

                                @NobodyHere:

                                I'm not sure what a message consisting solely of a link to a similar bug report means…

                                I think cmb means "it is a known issue and there is a bug report for it".

                                Yes, figured that was clear.

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                                • D
                                  dstroot
                                  last edited by

                                  Latest version broke unbound for me - it did not start after the upgrade.  I had to uncheck "Enable DNSSEC Support" to get it to come up.

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                                  • J
                                    jbc
                                    last edited by

                                    I have DNS resolver setup to use opendns via dnscrypt-proxy.
                                    I then have firewall rules setup to only allow lan clients to query lan address on port 53,
                                    and block requests to remote DNS'; Everything works in this regard (no dns leaks).

                                    But, if I query an unknown, none existant name, such as qwertyuiopas.dfghjklzxcvbnm
                                    I get:
                                    drill qwertyuiopas.dfghjklzxcvbnm
                                    ;; ->>HEADER<<- opcode: QUERY, rcode: NXDOMAIN, id: 40495
                                    ;; flags: qr rd ra ; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
                                    ;; QUESTION SECTION:
                                    ;; qwertyuiopas.dfghjklzxcvbnm. IN      A

                                    ;; ANSWER SECTION:

                                    ;; AUTHORITY SECTION:
                                    .      2918    IN      SOA    a.root-servers.net. nstld.verisign-grs.com. 2014122700 1800 900 604800 86400

                                    ;; ADDITIONAL SECTION:

                                    ;; Query time: 28 msec
                                    ;; SERVER: 127.0.0.1
                                    ;; WHEN: Sat Dec 27 18:05:03 2014
                                    ;; MSG SIZE  rcvd: 120

                                    And if I ping qwertyuiopas.dfghjklzxcvbnm; It resolves to my WAN ip… (I would expect an unknown host response)

                                    I have "NAT Reflection mode for port forwards" set to Pure NAT, could this be the culprit?

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                                    • D
                                      dstroot
                                      last edited by

                                      I am trying to do the same - can your describe this further?

                                      "I have DNS resolver setup to use opendns via dnscrypt-proxy.
                                      I then have firewall rules setup to only allow lan clients to query lan address on port 53,
                                      and block requests to remote DNS';"

                                      Right now I have DNS (53) blocked outbound from the LAN and Resolver in forwarding mode using OpenDNS.  However DNSSEC is giving me issues.

                                      What was the process to get dnscrypt-proxy going properly?

                                      Best,
                                      Dan

                                      firewall_home_lan_-_Services__DNS_Resolver.png
                                      firewall_home_lan_-_Services__DNS_Resolver.png_thumb
                                      firewall_home_lan_-_Services__DNS_Resolver__Advanced.png
                                      firewall_home_lan_-_Services__DNS_Resolver__Advanced.png_thumb

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                                      • D
                                        doktornotor Banned
                                        last edited by

                                        @dstroot:

                                        "I have DNS resolver setup to use opendns via dnscrypt-proxy.
                                        Right now I have DNS (53) blocked outbound from the LAN and Resolver in forwarding mode using OpenDNS.  However DNSSEC is giving me issues.

                                        DNSSEC != the OpenDNS nonsense that noone else uses. If you want DNSSEC, do not use OpenDNS.

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                                        • J
                                          jbc
                                          last edited by

                                          I installed the dnscrypt-proxy package and setup unbound with a forward-zone to 127.0.0.1.
                                          I then setup the dnscrypt-proxy, first using dnscrypt.eu-nl; which worked for a bit, but is unstable, so right now I have it querying opendns while I investigate the dnscrypt.eu issue…

                                          btw. I have dnssec checked. no problem.

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                                          • D
                                            dstroot
                                            last edited by

                                            @ doktornotor: "If you want DNSSEC, do not use OpenDNS."

                                            OK - do you have a recommendation what to use?

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