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    DHCP requests across firewall

    Scheduled Pinned Locked Moved DHCP and DNS
    66 Posts 3 Posters 15.3k Views
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    • D
      doktornotor Banned
      last edited by

      @technical:

      I'm not in a position where I'm able to be taking screenshots and cropping them left and right.

      So take more comfortable position. Or get some working tools. Or hire a full time screenshotter if too much work for you. ROFL.  :o ::)

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      • johnpozJ
        johnpoz LAYER 8 Global Moderator
        last edited by

        As to cropping them? Huh??  what OS are you on?  Windows 7 and above comes with free snipping tool that allows for simple cropping..  Same with linux has multiple screentaking tools.  I use faststone capture – best little piece of software ever ;)  Shoot even if took a screenshot with my phone allows for cropping..  Clearly your shot of your 1 freaking rule was cropped!!

        Again without info its impossible to help you!

        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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        • T
          technical ownage
          last edited by

          There's NetB.

          As for the relay, it's configured correctly. You've said how to do it 5 times.

          wp_ss_20150423_0001.png
          wp_ss_20150423_0001.png_thumb

          Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

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          • johnpozJ
            johnpoz LAYER 8 Global Moderator
            last edited by

            And there you go - why and the F would you be blocking bogon on your own segment?

            0.0.0.0/8 is listed in bogon..  What is the source of the broadcasts in dhcp discover.  Clicking the little X in the firewall log wold of told you it was blocked by bogon

            bogons0000.png
            bogons0000.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:

              And there you go - why and the F would you be blocking bogon on your own segment?

              Could have been worse. He might have blocked the RFC1918 as well. Nice waste of time, this…  ::)

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              • T
                technical ownage
                last edited by

                That's kind of funny, I distinctly mentioned the bogon block in another post.

                Anyways, I'll try that tonight. Makes sense though. Sorry for all this and thank you greatly!

                Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

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                • johnpozJ
                  johnpoz LAYER 8 Global Moderator
                  last edited by

                  Do you not having it logging the blocking of bogon?

                  Here I turned on and - yup blocking.

                  Yes you did mention it
                  "right below block bogon networks."

                  Picture is with 100,000 words!!! This is basic stuff it should of worked click click with normal set of rules, etc.  Even for a DMZ and yours is just a plain jane segment.  And who and the hell blocks bogon from their own private segment?  What do you think would be using bogon on your own network, which would never really work anyway..  And if your going to block it - why would you not log it?

                  I missed that or this would of been over much sooner..

                  Should prob put in ticket, if you enable relay they should prob do the same sort of rules when you enable dhcp server - this would be in front of bogon and allow it to work while still blocking bogon if you wanted, etc.

                  enabledbogon.png
                  enabledbogon.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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                  • T
                    technical ownage
                    last edited by

                    Yeah, I apologize for my own incompetence. XD I've never had a problem blocking bogons so I overlooked it. I realize the stress this has caused, my sincerest apologies.

                    Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

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                    • D
                      doktornotor Banned
                      last edited by

                      @johnpoz:

                      prob put in ticket, if you enable relay they should prob do the same sort of rules when you enable dhcp server - this would be in front of bogon and allow it to work while still blocking bogon if you wanted, etc.

                      No need, already done: https://redmine.pfsense.org/issues/4558

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                      • T
                        technical ownage
                        last edited by

                        I'm on 2.1.5, by the way

                        Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

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                        • D
                          doktornotor Banned
                          last edited by

                          It's the same issue everywhere, 2.1.x or not. You just won't get any fix on 2.1.x

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                          • johnpozJ
                            johnpoz LAYER 8 Global Moderator
                            last edited by

                            Yet more information that could of been provided - why are you not current 2.2.2 if just setting this up?  I would assume this was new setup trying to get a network to work with dhcp sounds like new install to me.

                            Yeah from that bug report looks like will be fixed in 2.2.3 that should help out the next guy with this sort of problem.

                            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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                            • T
                              technical ownage
                              last edited by

                              This was a newly set up windows dhcp server, so I was trying to transfer the DHCP load from pfSense to the windows server. Also, I didn't think the version would make much difference since this was a logistical problem. So is there no point in blocking bogons on internal networks? One of the guides I watched said it wouldn't make a difference, turns out it does!

                              Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

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                              • johnpozJ
                                johnpoz LAYER 8 Global Moderator
                                last edited by

                                look at the table of what is in bogon - why would any of those networks be on your local network?  To be honest I don't really see much point in blocking them on the wan either ;)  Default rule is block on wan.  So blocking bogon would just be for ports that you have opened.  And bogon are not even routeable on the internet, etc.

                                They seem to cause way more problems then they are worth in blocking any sort of risk.  that 0.0.0.0/8 for example your seeing.  And there are some other networks in the ipv6 bogon that really legit for link local addressing.

                                As to your version of pfsense - its good idea to stay current.  They add nice stuff in every update, for example the listings of the rule that blocked in the logs ;)  2.2 has full resolver vs just forwarder for dns, etc.

                                As to dhcp load - I highly doubt that is a problem for pfsense..  But sure dhcp is better to run off your windows AD then pfsense.

                                While generally speaking yes if not a valid address shouldn't be allowed - but without real easy way to edit the list you can run into stuff that may or may not be "valid"  And the way they have it added to the rules there is really no way to put stuff in front of it, etc.

                                If you were really worried about blocking bogons, I would prob just grab the list and put in a alias and use that in a normal rule vs how they have bogon implemented in pfsense.

                                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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                                • T
                                  technical ownage
                                  last edited by

                                  I tried 2.2 when that came out, but I was getting weird errors, so I just decided to wait a little while.

                                  As for dhcp load, yeah that was the wrong word XD More.. Functionality? I just want to be authoritative over my domain (DNS, DHCP, etc.). Plus, windows AD is incredibly fun and interesting! Haha, I'm well aware of pfSense's power, it truly is a masterpiece!

                                  Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

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                                  • johnpozJ
                                    johnpoz LAYER 8 Global Moderator
                                    last edited by

                                    I agree if your running an AD then dns and dhcp should be by your AD not your router ;)

                                    As to it being fun, that would be a matter of opinion.  While it has always been interesting, not sure I would use the word fun to describe MS products ;)  I have been admin of windows networks since before there was "domains" back when it was only 3.11 for "workgroups" and then went to NT 3.51 as server from OS2, etc.

                                    As to your issues with 2.2 - where you blocking bogon on your lan interfaces? ;)

                                    You really should move away from 2.1 and go to 2.2, unless you were in some critical production setup there is no reason not to be current.

                                    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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                                    • T
                                      technical ownage
                                      last edited by

                                      Ha ha. In reality, most likely. But my problem was hardware, I believe. I'm going to try again and go into more depth soon. As for my current setup, when I try to switch between WAPs on each subnet, it only gives me a lease from the first subnet I joined and I also am unable to access the web. Is this a windows thing?

                                      Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

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                                      • johnpozJ
                                        johnpoz LAYER 8 Global Moderator
                                        last edited by

                                        What do you mean it gives you IP from the first subnet?  Why would you have Wireless on both segments?  Wireless should be its own segment.

                                        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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                                        • T
                                          technical ownage
                                          last edited by

                                          Wireless device A connects to WAP on NetA and gets an IP from NetA scope. Wireless device A then switches to WAP on NetB but doesn't get a new IP from the NetB scope, it keeps the old NetA address.

                                          One on each subnet so I can administer them differently (Content filtering and whatnot)

                                          Its own segment? Is this good practice or absolutely necessary for this to work?

                                          Also: I tried enabling Name Protection on the entire IPv4 region of the DHCP server, doesn't seem to have worked.

                                          Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

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                                          • johnpozJ
                                            johnpoz LAYER 8 Global Moderator
                                            last edited by

                                            So you just move to new wireless network, is this a different ssid?  Did you release the IP to get a new one?

                                            I have never in all my years of working with IT and networking ever seen anyone put bridged wireless on 2 different segments like your doing.. Its completely pointless!!

                                            Your wireless should be on its own segment plain and simple, or bridged to 1 of them.. It sure and the hell does not need to be on both.    Name protection??  Why do you think you need that??

                                            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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