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Can't access DMZ from LAN

Scheduled Pinned Locked Moved General pfSense Questions
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  • S
    Su30MKI
    last edited by Aug 2, 2018, 3:31 PM

    I have created a LAN interface and DMZ interface. I am able to ping DMZ gateway from LAN, But i am unable to ping any DMZ hosts from LAN. Can anyone help me on this?

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    • J
      johnpoz LAYER 8 Global Moderator
      last edited by Aug 2, 2018, 3:48 PM

      The common issue for this is dmz has host firewall, or using a different gateway.

      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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      • S
        Su30MKI
        last edited by Aug 2, 2018, 3:51 PM

        I have done a Multi-WAN load balancer for LAN. So the default gateway is the gateway group created. I will try changing DMZ gateway too to the gateway group.

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        • J
          johnpoz LAYER 8 Global Moderator
          last edited by Aug 2, 2018, 3:55 PM

          No that is not what you would do... You should of mentioned you were forcing traffic out a gateway.

          Make sure you have a rule on your lan that allows access to your dmz before you policy route traffic out your gateway group.

          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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          • S
            Su30MKI
            last edited by Aug 2, 2018, 4:04 PM

            Yes I have created a rule in LAn Protocol->Any Source->Lan Net Dest -> DMZ net. I can ping the gateway from the LAN host but not the DMZ servers

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            • J
              johnpoz LAYER 8 Global Moderator
              last edited by Aug 2, 2018, 4:15 PM

              post up your lan rules please - picture. The rule has to be ABOVE your policy routing rule. If it is and you can not ping host in dmz.. Then again is dmz host running a firewall that allows access from your lan net, is the dmz host actually using pfsense dmz IP as its gateway.

              Simple sniff would validate that pfsense is sending on the traffic to the dmz host.

              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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              • S
                Su30MKI
                last edited by Su30MKI Aug 2, 2018, 4:36 PM Aug 2, 2018, 4:28 PM

                I have allowed all the traffic from LAn net to DMZ_NET

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                • S
                  Su30MKI
                  last edited by Su30MKI Aug 2, 2018, 4:35 PM Aug 2, 2018, 4:31 PM

                  I
                  Here is the picture of LAN rules.0_1533227515313_LAN_RULES-1.PNG

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                  • J
                    johnpoz LAYER 8 Global Moderator
                    last edited by Aug 2, 2018, 4:47 PM

                    Well don't see any hits on that rule.. ie the 0/0

                    Sniff on pfsense lan, do you see your traffic hit pfsense dest for dmz? Sniff on dmz interface on pfsense - do you see the traffic sent to the dmz host?

                    If so then its on the dmz host.. This is like 2 seconds to troubleshoot.

                    Do you have any rules in floating? Like blocking access to dmz, which would explain why you have zero hits on your dmz rule.

                    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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                    • S
                      Su30MKI
                      last edited by Aug 2, 2018, 5:00 PM

                      And this are the DMZ rules0_1533229250908_DMZ_Rules.PNG

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                      • S
                        Su30MKI
                        last edited by Aug 2, 2018, 5:03 PM

                        I have enabled Snort on DMZ for IPS. Could that be an issue?

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                        • J
                          johnpoz LAYER 8 Global Moderator
                          last edited by Aug 2, 2018, 5:07 PM

                          Dude your rules on dmz have ZERO to do with the problem..

                          You don't need any rules on dmz for lan to talk to dmz.. The return traffic from dmz back to your client starting the conversation with some on dmz would be allowed by the state.

                          Do you have any rules in floating?

                          If not then do a simple sniff on lan - do you see the traffic from your lan host going to your dmz IP your trying to talk to.. Great.. Do same sniff on dmz interface - do you see traffic when you try and talk to dmz? If so then problem on your dmz host.

                          Post back with your sniff results.. I can duplicate this for you in like 2 minutes if you need to see pictures or something..

                          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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