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    DNS Fowarder Or DNS Resolver

    Scheduled Pinned Locked Moved DHCP and DNS
    26 Posts 6 Posters 8.0k Views
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    • johnpozJ
      johnpoz LAYER 8 Global Moderator
      last edited by

      You shouldn't be using either of them if all your clients point to your AD..

      As to what is better forwarder or resolver - do you understand what the difference is?  There is no one better than the other, depending on what your trying/wanting to accomplish one might be better suited than the other.

      A forwarder just forwards the query to some other server to get the answer or answers from its cache.  So your client asks pfsense running forwarder or resolver in forward mode for www.pfsense.org.. If that was say just looked up by someone else, then it can return the IP for www.pfsense.org from its cache.  If not he will "forward" that question to say your isp dns, googledns, opendns, 4.2.2.2 whatever you setup that it should forward too.  That upstream server will then send down the answer from its cache, or maybe even forward it on to something else.  Until you hit a resolver.  The resolver is the one that asks the root servers, hey what is owning server for .org, ok lets go ask them for what is the owning server for pfsense.org, ok lets go that ns for the A record www in pfsense.org

      So what do you want to do, do you want to forward or resolve?  And why does it matter since your clients should be talking to your AD anyway.  What you should be concerned with is how your AD is setup - does it forward, to where or does it resolve?

      So for example NS for .org are below, you get them from one of these

      ;; ANSWER SECTION:
      .                      436480  IN      NS      i.root-servers.net.
      .                      436480  IN      NS      e.root-servers.net.
      .                      436480  IN      NS      l.root-servers.net.
      .                      436480  IN      NS      g.root-servers.net.
      .                      436480  IN      NS      f.root-servers.net.
      .                      436480  IN      NS      j.root-servers.net.
      .                      436480  IN      NS      a.root-servers.net.
      .                      436480  IN      NS      k.root-servers.net.
      .                      436480  IN      NS      d.root-servers.net.
      .                      436480  IN      NS      m.root-servers.net.
      .                      436480  IN      NS      c.root-servers.net.
      .                      436480  IN      NS      h.root-servers.net.
      .                      436480  IN      NS      b.root-servers.net.

      ;; QUESTION SECTION:
      ;org.                          IN      NS

      ;; ANSWER SECTION:
      org.                    86400  IN      NS      c0.org.afilias-nst.info.
      org.                    86400  IN      NS      a2.org.afilias-nst.info.
      org.                    86400  IN      NS      b0.org.afilias-nst.org.
      org.                    86400  IN      NS      d0.org.afilias-nst.org.
      org.                    86400  IN      NS      a0.org.afilias-nst.info.
      org.                    86400  IN      NS      b2.org.afilias-nst.org.

      So I can go ask them for hey who is ns for pfsense.org

      ; <<>> DiG 9.9.5-3ubuntu0.2-Ubuntu <<>> @c0.org.afilias-nst.info pfsense.org ns
      :; udp: 4096
      ;; QUESTION SECTION:
      ;pfsense.org.                  IN      NS

      ;; AUTHORITY SECTION:
      pfsense.org.            86400  IN      NS      dns1.registrar-servers.com.
      pfsense.org.            86400  IN      NS      dns4.registrar-servers.com.
      pfsense.org.            86400  IN      NS      dns5.registrar-servers.com.
      pfsense.org.            86400  IN      NS      dns2.registrar-servers.com.
      pfsense.org.            86400  IN      NS      dns3.registrar-servers.com.

      I can then go ask one of them for www.pfsense.org

      ; <<>> DiG 9.9.5-3ubuntu0.2-Ubuntu <<>> @dns1.registrar-servers.com www.pfsense.org
      ;; QUESTION SECTION:
      ;www.pfsense.org.              IN      A

      ;; ANSWER SECTION:
      www.pfsense.org.        3600    IN      A      208.123.73.69

      ;; Query time: 122 msec
      ;; SERVER: 185.61.155.14#53(185.61.155.14)

      An intelligent man is sometimes forced to be drunk to spend time with his fools
      If you get confused: Listen to the Music Play
      Please don't Chat/PM me for help, unless mod related
      SG-4860 24.11 | Lab VMs 2.8, 24.11

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      • K
        killmasta93
        last edited by

        @johnpoz Thank you for a detailed response. Now i get it. So my testing setup should have no conflict, If I have DHCP Server disabled on pfSense and enabled on windows server, DNS on windows server with AD, And DNS resolver(unbound) block ads with DNSBL (pfblockerNG dev).  :D

        Tutorials:

        https://www.mediafire.com/folder/v329emaz1e9ih/Tutorials

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        • johnpozJ
          johnpoz LAYER 8 Global Moderator
          last edited by

          And what is going to ask pfsense for dns stuff - your AD dns server?

          An intelligent man is sometimes forced to be drunk to spend time with his fools
          If you get confused: Listen to the Music Play
          Please don't Chat/PM me for help, unless mod related
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          • K
            killmasta93
            last edited by

            pfSense would use the lSP DNS then the AD DNS

            Clipboarder.2015.05.18-003.png
            Clipboarder.2015.05.18-003.png_thumb

            Tutorials:

            https://www.mediafire.com/folder/v329emaz1e9ih/Tutorials

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            • johnpozJ
              johnpoz LAYER 8 Global Moderator
              last edited by

              And why does pfsense need to resolve your ad clients?  And no that is not what that means..

              What do you think happens when it asks 200.13.249.101 or itself running the resolver for something.yourADdomain.tld and gets back a NX?  Do you think it moves on to the next one?  That is not how dns works..

              Even if you were asking in parallel on how the forwarder use to work.. It would ask all of those at the same time and first answer wins, etc.

              Where is your AD dns forwarding too or resolving?  If you want pfsense to be able to resolve stuff in your AD, then point pfsense to your AD dns - period!

              Or in the forwarder/resolver put in a over ride for your AD that points to your AD server..  What exactly do you want to happen, and how is your DNS in AD setup.. Does it forward - to where, or does it asks roots?

              An intelligent man is sometimes forced to be drunk to spend time with his fools
              If you get confused: Listen to the Music Play
              Please don't Chat/PM me for help, unless mod related
              SG-4860 24.11 | Lab VMs 2.8, 24.11

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              • K
                killmasta93
                last edited by

                Allright sorry for the late reply i was having some DNS troubles with the AD. Anyways i would set the AD DNS forwarders to use pfSense and then let Unbound do the DNSBL blocking. Correct?

                Tutorials:

                https://www.mediafire.com/folder/v329emaz1e9ih/Tutorials

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                • johnpozJ
                  johnpoz LAYER 8 Global Moderator
                  last edited by

                  What are you using in pfsense that does DNSBL blocking?

                  Are you going to create local over rides for stuff you don't want to resolve?

                  An intelligent man is sometimes forced to be drunk to spend time with his fools
                  If you get confused: Listen to the Music Play
                  Please don't Chat/PM me for help, unless mod related
                  SG-4860 24.11 | Lab VMs 2.8, 24.11

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                  • K
                    killmasta93
                    last edited by

                    im using DNSBL Feeds to block ads and malware domains  ;D

                    Tutorials:

                    https://www.mediafire.com/folder/v329emaz1e9ih/Tutorials

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                    • johnpozJ
                      johnpoz LAYER 8 Global Moderator
                      last edited by

                      And how does that block dns query.. Or replace the query, that is just a firewall rule your creating with pfblocker?

                      Unbound has no method of using that feed that I am aware of.  So why do you have to have your AD point to pfsense - just have it forward to public say your isp or do direct from roots?  Only reason I could see to forward to pfsense resolver would be to have dnssec support.

                      An intelligent man is sometimes forced to be drunk to spend time with his fools
                      If you get confused: Listen to the Music Play
                      Please don't Chat/PM me for help, unless mod related
                      SG-4860 24.11 | Lab VMs 2.8, 24.11

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                      • F
                        fraglord
                        last edited by

                        I have pretty much the same setup here: All clients use the AD DNS which forwards the requests to pfsense that takes care of ads and malware (DNSBL). For pfBlockerNG I had to move over to unbound (DNS resolver). Before DNS forwarder provided an option to query the DNS servers under system -> general setup sequentially. Unfortunately for DNS resolver I cannot find a setting like this. What is the default behavior of querying the DNS servers using unbound?

                        pfSense 2.4.0 (amd64) running on IGEL H710C | 1G RAM | 8G SSD | INTEL PRO/1000 PT Dual NIC

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                        • johnpozJ
                          johnpoz LAYER 8 Global Moderator
                          last edited by

                          Again what does a firewall rule blocking access to specific IPs have to do with what dns you query??

                          Please show how your using dnsbl in pfsense to block it is you want to block.. Unbound or the forwarder have no connection with any sort of dnsbl list AFAIK..  So you have a firewall rule using some list to block stuff - this has NOTHING to do with dns query be from forwarder, resolver or your AD..

                          An intelligent man is sometimes forced to be drunk to spend time with his fools
                          If you get confused: Listen to the Music Play
                          Please don't Chat/PM me for help, unless mod related
                          SG-4860 24.11 | Lab VMs 2.8, 24.11

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                          • F
                            fraglord
                            last edited by

                            Well ask the OP. :) My question was simply how unbound queries the DNS servers (parallel / sequiential) as there is no option to set this.

                            pfSense 2.4.0 (amd64) running on IGEL H710C | 1G RAM | 8G SSD | INTEL PRO/1000 PT Dual NIC

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                            • johnpozJ
                              johnpoz LAYER 8 Global Moderator
                              last edited by

                              "I have pretty much the same setup here: All clients use the AD DNS which forwards the requests to pfsense that takes care of ads and malware (DNSBL)"

                              You just stated you have the same setup.. WTF are you in the thread for if you have a question about something else - start your OWN thread..

                              Unbound is meant to be a RESOLVER.. If you want to forwarder mode and use sequential or parallel mode use dnsmasq  - if your using unbound in forwarder mode, to be honest your using it wrong ;) Just use the older forwarder.  Why would you think you need to move to the resolver/unbound to use pfblockerNG??  pfblocker downloads lists of IPs, and put them in firewall rules/aliases - why would it freaking care if you use a forwarder/resolver be it dnsmasq, unbound, bind, tiny, etc. etc..

                              So I just installed pfblockerNG.. Where is it ask anything about what dns your using or have any integration with dnsbl??

                              dnsblpfblockerng.png
                              dnsblpfblockerng.png_thumb

                              An intelligent man is sometimes forced to be drunk to spend time with his fools
                              If you get confused: Listen to the Music Play
                              Please don't Chat/PM me for help, unless mod related
                              SG-4860 24.11 | Lab VMs 2.8, 24.11

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                              • D
                                doktornotor Banned
                                last edited by

                                @johnpoz:

                                So I just installed pfblockerNG.. Where is it ask anything about what dns your using or have any integration with dnsbl??

                                This is in non-public -dev version; totally off-topic here.

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                                • johnpozJ
                                  johnpoz LAYER 8 Global Moderator
                                  last edited by

                                  Ok how do I install this -dev version?

                                  How does it integrate with unbound?  pfblocker has been nothing more than a list downloader that you put into rules/aliases..  What you use for dns should have nothing to do with that - other than the dns you do use needs to be able to resolver where you grab the list of IPs.

                                  An intelligent man is sometimes forced to be drunk to spend time with his fools
                                  If you get confused: Listen to the Music Play
                                  Please don't Chat/PM me for help, unless mod related
                                  SG-4860 24.11 | Lab VMs 2.8, 24.11

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                                  • D
                                    doktornotor Banned
                                    last edited by

                                    @johnpoz:

                                    Ok how do I install this -dev version?

                                    PM BBcan17.

                                    @johnpoz:

                                    How does it integrate with unbound?  pfblocker has been nothing more than a list downloader that you put into rules/aliases..  What you use for dns should have nothing to do with that - other than the dns you do use needs to be able to resolver where you grab the list of IPs.

                                    It's redirecting the requests to 1x1px image on webserver run on pfSense's virtual IP instead of blocking.

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                                    • F
                                      fraglord
                                      last edited by

                                      @johnpoz: You should watch your language and learn to read the posts properly! killmasta93 wrote he is using DNSBL (pfblockerNG dev) just like me.
                                      And DNSBL requires unbound (dns resolver) to work - if you believe or not.
                                      Also nonsense that DNS resolver is used in "wrong" way if you enable forwarding mode; the official FAQ for Unbound DNS Resolver tells you to have it enabled for multi-WAN configurations.
                                      The configuration of the AD DNS is pretty simple: all clients use the AD DNS IP address, no secondary DNS. In the DNS settings ("forwarders") enter the IP of your pfsense box and uncheck "use root hints…". In pfsense unter system -> general setup you can set the DNS servers of your ISP, Google, OpenDNS etc. Do not add your AD DNS here.

                                      pfSense 2.4.0 (amd64) running on IGEL H710C | 1G RAM | 8G SSD | INTEL PRO/1000 PT Dual NIC

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                                      • johnpozJ
                                        johnpoz LAYER 8 Global Moderator
                                        last edited by

                                        Watch my language?

                                        Sorry but the OP did not state he was running a DEV only version - nor did you..

                                        "So currently im using DNS Resolver (Unbound) for PfblockerNG 2.0 works great"

                                        Where does it say that is DEV version.. Sorry if I don't keep up with the version numbers of all the packages available.

                                        "pfsense that takes care of ads and malware (DNSBL). For pfBlockerNG"

                                        Where did you state that you using DEV version..

                                        As to wrong way – yeah you are IMHO.. As I stated but you clearly didn't read if you want the forwarder function where you can do seq or parallel use dnsmasq the old forwarder.  Unbound has no functionality this -- if you want that sort of functionality maybe there is another DEV version you can try ;)

                                        An intelligent man is sometimes forced to be drunk to spend time with his fools
                                        If you get confused: Listen to the Music Play
                                        Please don't Chat/PM me for help, unless mod related
                                        SG-4860 24.11 | Lab VMs 2.8, 24.11

                                        1 Reply Last reply Reply Quote 0
                                        • F
                                          fraglord
                                          last edited by

                                          @killmasta93:

                                          @johnpoz Thank you for a detailed response. Now i get it. So my testing setup should have no conflict, If I have DHCP Server disabled on pfSense and enabled on windows server, DNS on windows server with AD, And DNS resolver(unbound) block ads with DNSBL (pfblockerNG dev).  :D

                                          pfSense 2.4.0 (amd64) running on IGEL H710C | 1G RAM | 8G SSD | INTEL PRO/1000 PT Dual NIC

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                                          • johnpozJ
                                            johnpoz LAYER 8 Global Moderator
                                            last edited by

                                            Whatever dude that was post 5 in the thread already and the last word in the post..

                                            I now have this dev version.  So setup your AD to forward to your pfsense..  Since to use pfbng with dnsbl you need unbound, we are done.  If using unbound I don't see why you would not use it resolver mode with dnssec support.

                                            Your question is not related fraglord.. But if your going to be using unbound, if you turn on forwarder mode it will ask them roundrobin fashion.. Verified this via sniff

                                            roundrobins.png
                                            roundrobins.png_thumb

                                            An intelligent man is sometimes forced to be drunk to spend time with his fools
                                            If you get confused: Listen to the Music Play
                                            Please don't Chat/PM me for help, unless mod related
                                            SG-4860 24.11 | Lab VMs 2.8, 24.11

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