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    No access to webinterface "Potential DNS Rebind attack detected" since July/3

    Scheduled Pinned Locked Moved 2.0-RC Snapshot Feedback and Problems - RETIRED
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    • jimpJ
      jimp Rebel Alliance Developer Netgate
      last edited by

      This commit just went in which should help with dyndns hostnames, as long as the dyndns hostname is configured in pfSense (which it should be in most cases).

      Can you try to gitsync and try again?

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      • jimpJ
        jimp Rebel Alliance Developer Netgate
        last edited by

        And I committed a fix after that which fixed another issue with that.

        It works for me from dyndns hostnames now.

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        • C
          clarknova
          last edited by

          Sorry, I tried everything on the git page you linked and got nothing but errors. I also made my filesystem writable first but no dice.

          db

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          • jimpJ
            jimp Rebel Alliance Developer Netgate
            last edited by

            ah, on nanobsd that doesn't work so well.

            You'll have to wait for the next new image. I stopped a build in progress since it didn't have these changes, and started it again. It will probably be late this evening when it uploads the nanobsd images.

            Or you can download an updated copy of /etc/inc/auth.inc:

            # /etc/rc.conf_mount_rw
            # fetch -o /etc/inc/auth.inc http://redmine.pfsense.org/projects/pfsense/repository/revisions/master/raw/etc/inc/auth.inc
            # /etc/rc.conf_mount_ro
            

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            • C
              clarknova
              last edited by

              I'll try the next snapshot then. Is there some cleanup I need to do in my filesystem after attempting to install git? I don't see anything glaringly out of place in /root or /tmp.

              db

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              • jimpJ
                jimp Rebel Alliance Developer Netgate
                last edited by

                @clarknova:

                I'll try the next snapshot then. Is there some cleanup I need to do in my filesystem after attempting to install git? I don't see anything glaringly out of place in /root or /tmp.

                Not really, it might leave some files in /root/pfSense/ you can safely remove.

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                • M
                  mxx
                  last edited by

                  Hi again,

                  tried the 6th June Snapshot, still the same issue.
                  Cannot access the webinterface from wan by its ipaddress nor hostname. DNS Rebindโ€ฆ
                  I'll try next snapshot when it comes available.

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                  • C
                    clarknova
                    last edited by

                    Jim made the change around 3.5 hours ago; not long enough to be in the latest build. The next snapshot will be the true test.

                    db

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                    • M
                      mxx
                      last edited by

                      Yes, I'm excited already ;)

                      BTW: was just referring to "Have you tried with a snapshot from the 5th or preferably the 6th?"

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                      • jimpJ
                        jimp Rebel Alliance Developer Netgate
                        last edited by

                        Especially since I had to stop the builder and restart it again, we found several more bugs and cases to test for in that code.

                        If you need the fixes, pull in the code with the fetch command I mentioned above and it should be OK.

                        Remember: Upvote with the ๐Ÿ‘ button for any user/post you find to be helpful, informative, or deserving of recognition!

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                        • M
                          mxx
                          last edited by

                          Hey, thnx very much.
                          I for myself will stick to 30th June Snapshot in the meanwhile.

                          Thnx for all the hard work!

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                          • ?
                            Guest
                            last edited by

                            This may be a Potential DNS Rebind attack not an issue with pfsense. Do an nslookup or dig of google.com or twitter.comย  Use multiple DNS servers other than your own as well as the router.

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                            • jimpJ
                              jimp Rebel Alliance Developer Netgate
                              last edited by

                              @zarthan:

                              This may be a Potential DNS Rebind attack not an issue with pfsense. Do an nslookup or dig of google.com or twitter.comย  Use multiple DNS servers other than your own as well as the router.

                              No, we actually added a bunch of code to protect against DNS rebind attacks that would affect the web interface, but the checks needed some work. They should be OK in the next snapshot that comes out.

                              Remember: Upvote with the ๐Ÿ‘ button for any user/post you find to be helpful, informative, or deserving of recognition!

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                              • K
                                kpa
                                last edited by

                                If you have an account at OpenDNS.com (and not just using their forwarders) you can have RFC1918 responses filtered out automatically, effectively disabling all DNS rebind attacks.

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                                • jimpJ
                                  jimp Rebel Alliance Developer Netgate
                                  last edited by

                                  @kpa:

                                  If you have an account at OpenDNS.com (and not just using their forwarders) you can have RFC1918 responses filtered out automatically, effectively disabling all DNS rebind attacks.

                                  There is a checkbox in the current repo code to disable these checks entirely if you want :-)

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                                  • M
                                    mxx
                                    last edited by

                                    Hi again,

                                    just to let you know: the current snapshot 20100706-2143 still doesn't allow me to access the webinterface via its ip address nor hostname :(

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                                    • jimpJ
                                      jimp Rebel Alliance Developer Netgate
                                      last edited by

                                      @mxx:

                                      Hi again,

                                      just to let you know: the current snapshot 20100706-2143 still doesn't allow me to access the webinterface via its ip address nor hostname :(

                                      What type of snapshot or update file is that? I'm not seeing any files with that timestamp.

                                      Are you running the GUI on a standard port? Any kind of port forwarding involved?

                                      Does it work after you do the fetch command I mentioned earlier in this thread?

                                      Remember: Upvote with the ๐Ÿ‘ button for any user/post you find to be helpful, informative, or deserving of recognition!

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                                      • M
                                        mxx
                                        last edited by

                                        I used http://snapshots.pfsense.org/FreeBSD_RELENG_8_1/i386/pfSense_HEAD/updates/pfSense-Full-Update-2.0-BETA3-20100706-2143.tgz

                                        That's the latest one I've found.

                                        I'm running the webif on a non standard port (5556). No port forwarding at all.

                                        Sorry didn't try to download the inc file manually as I thought it would already have been built-in in this Snapshot.

                                        I'll give that a try now!

                                        Thank you!

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                                        • jimpJ
                                          jimp Rebel Alliance Developer Netgate
                                          last edited by

                                          It's possible that the snapshot didn't get all of the changes we checked in, I don't remember when it was started.

                                          Remember: Upvote with the ๐Ÿ‘ button for any user/post you find to be helpful, informative, or deserving of recognition!

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                                          • jimpJ
                                            jimp Rebel Alliance Developer Netgate
                                            last edited by

                                            That snapshot does have the code for letting you in with the GUI on an alternate port, and I can put my WebGUI on that port and it works fine.

                                            Is there something else different about how you access the GUI? A proxy involved somehow?

                                            Remember: Upvote with the ๐Ÿ‘ button for any user/post you find to be helpful, informative, or deserving of recognition!

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