Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    PFSENSE couldnt get WAN ip from modem

    Scheduled Pinned Locked Moved Problems Installing or Upgrading pfSense Software
    33 Posts 9 Posters 12.2k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • R
      rangarajan
      last edited by

      Dear Team,  i have installed pfsense firewall version 2.3.5 yesterday ,  situation is my pfsense ssetup is  >ISP > MODEM > PFSENSE FIREWALL > CISCO SWITCH > ALL OTHER DEVICES  prooblem is pfsense coul detecct LAN interface automatically but unable to recognise WAN interface ip as well as i am able to ping 127.0.0.1 and default gateway of assigned LAN ip 192.168.1.1 apart from it i am unable to ping DNS 8.8.8.8 as well as locally with ip ranging from 192.168.1.5 to 192.168.1.253 which was assigned by me in basic pfsense setup .  can any one please help me in this issue .  Thank you

      1 Reply Last reply Reply Quote 0
      • D
        droeders
        last edited by

        Did you reboot the modem from your ISP after connecting it to your pfSense WAN interface?

        1 Reply Last reply Reply Quote 0
        • R
          rangarajan
          last edited by

          yeah !  then also WAN interface is not detected automatically could you help me in this case

          1 Reply Last reply Reply Quote 0
          • D
            droeders
            last edited by

            There are lots of reasons why this could be failing, but you're not giving us enough information to help you.  In general, please provide as much information as possible, even if you don't think it's relevant.

            What type of internet connection to you have?

            Has this internet connection worked with other firewalls/routers?

            Is the modem hooked directly to your pfSense machine via ethernet or is a switch involved?

            Have you tested this with known good network cables?

            Please tell us what hardware you're using, and in particular, what kind of network interface cards you have?

            The more information the better…

            1 Reply Last reply Reply Quote 0
            • R
              rangarajan
              last edited by

              we have broadband cable modem with type DHCP ,

              yes from cable modem to laptop directly it worked , where as in case if i try from  cable modem to pfsesne firewall its not pinging by default gateway of cable modem as well as DNS server of google 8.8.8.8 ping request also failed

              But from pfsense LAN interface when i connect to LAPTOP directly i can access pfsense web gui.

              cable modem is directly hooked to pfsense WAN interface later from pfsense LAN interface i am trying to connect to switch

              yes , i have tested with good working condition RJ 45 cable

              i am using "hp thin client t5740" as pfsense firewall in my setup

              i do have one WAN interface card in t as well as two LAN interface card in it.

              please try to help me in this .

              1 Reply Last reply Reply Quote 0
              • ?
                Guest
                last edited by

                OK.

                When you connect your laptop directly to the ISP Router, it works. What is the LAN IP address of he ISP Router?

                1 Reply Last reply Reply Quote 0
                • R
                  rangarajan
                  last edited by

                  When i try to connect my Laptop directly to ISP Modem it works fine i can able to ping default GW 192.168.1.251 and DNS server 8.8.8.8, Apart from it the LAN ip is 192.168.1.197

                  1 Reply Last reply Reply Quote 0
                  • ?
                    Guest
                    last edited by

                    And that is why pfSense does not work.

                    By default PFSense sets it's LAN network to the 192.168.1.* range, you cannot have that range on both the LAN and WAN interfaces.

                    You need to go back to the shell menu of pfSense,Option 2, and change the LAN address and DHCP range to 192.168.2.*

                    1 Reply Last reply Reply Quote 0
                    • R
                      rangarajan
                      last edited by

                      just a moment am  working on it , thanks for this information i like it

                      1 Reply Last reply Reply Quote 0
                      • R
                        rangarajan
                        last edited by

                        hey despite of changing pfsense LAN ip to 192.168.2.* i cant access it in web gui (pfsense) from the system comming under cisco switch connection

                        cable modem (192.168.1.251)> pfsense (192.168.2.1)> cisco switch(smart switch) > other system.(192.168.1.*)

                        from above i am unable to access pfsense web gui from systems under cisso switch(managed one).

                        1 Reply Last reply Reply Quote 0
                        • ?
                          Guest
                          last edited by

                          I said, connect directly to pfSense from your Laptop, where did I say to go via the Cisco switch?

                          Can you connect to pfSense when connected directly from the LAN port of pfSense to your Laptop, YES OR NO?

                          1 Reply Last reply Reply Quote 0
                          • R
                            rangarajan
                            last edited by

                            yes , i can directly connect pfsense with LAN port of laptop i get DNS server as 192.168.2.1 and IP V4 of laptop as 192.168.2.2 , Here 192.168.2.1 is the LAN ip assigned in shell prompt of pfsense .

                            1 Reply Last reply Reply Quote 0
                            • ?
                              Guest
                              last edited by

                              Good. Now connect the WAN port of pfSense to the ISP router.

                              1 Reply Last reply Reply Quote 0
                              • R
                                rangarajan
                                last edited by

                                yeah , did as directed but WAN ip is not detecting automatically as well as i couldn't ping 8.8.8.8 DNS server of google from laptop command prompt ?

                                1 Reply Last reply Reply Quote 0
                                • ?
                                  Guest
                                  last edited by

                                  OK, leave the WAN connected, and go into the pfSense Web interface, What does it show as the IP address of the WAN interface?

                                  1 Reply Last reply Reply Quote 0
                                  • R
                                    rangarajan
                                    last edited by

                                    hi ,

                                    sorry for delay .No IP is detected its empty in the WAN interface field.

                                    1 Reply Last reply Reply Quote 0
                                    • stephenw10S
                                      stephenw10 Netgate Administrator
                                      last edited by

                                      Does it show the WAN interface as UP? (green arrow)

                                      Can we see a screenshot from Status > Interfaces.

                                      Steve

                                      1 Reply Last reply Reply Quote 0
                                      • R
                                        rangarajan
                                        last edited by

                                        no WAN interface is in RED

                                        1 Reply Last reply Reply Quote 0
                                        • NollipfSenseN
                                          NollipfSense
                                          last edited by

                                          Dude…why are you opening multiply thread on the same exact issue...that's a big turn off!

                                          Onto the subject at hand...sounds to me some conflict going on with your cable modem and might need to be in bridge mode.

                                          pfSense+ 23.09 Lenovo Thinkcentre M93P SFF Quadcore i7 dual Raid-ZFS 128GB-SSD 32GB-RAM PCI-Intel i350-t4 NIC, -Intel QAT 8950.
                                          pfSense+ 23.09 VM-Proxmox, Dell Precision Xeon-W2155 Nvme 500GB-ZFS 128GB-RAM PCIe-Intel i350-t4, Intel QAT-8950, P-cloud.

                                          1 Reply Last reply Reply Quote 0
                                          • R
                                            rangarajan
                                            last edited by

                                            should i need to change any settings over there ?

                                            1 Reply Last reply Reply Quote 0
                                            • First post
                                              Last post
                                            Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.