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

    pfsense plus on Azure - PAT not working

    Scheduled Pinned Locked Moved Firewalling
    4 Posts 2 Posters 40 Views 2 Watching
    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.
    • M Offline
      MtMt
      last edited by

      I have activate the pfsense plus image on my cloud VM,the Azure VM has 2 subnets

      LAN subnet : 10.20.1.0/24 - VM Lan interface : 10.20.1.10 static IP address
      WAN subnet : 10.20.2.0/24 - VM WAN interface : 10.20.2.10 DHCP IP address ( default gateway IP 10.20.2.1 Via auto provisioning by Azure network layer)
      Public IP x.x.x.x is 1:1 Azure mapped to WAN IP 10.20.2.10

      i can connect to the public IP address (x.x.x.x) and access pfsense web UI (https : 443 ). i am also able to SSH to the public address (ssh: 22) , and able to successfully SSH to pfsense firewall appliance.

      but any port forwarding on pfsense is not working. For example:

      A windows OS VM with 10.20.1.11 (lan subnet) which has RDP configured and active on it. in the pfsense webgui settings, i have configured port forwarding (3389) on WAN interface pfsense to forward to 10.20.1.11, also i have confirmed relevant firewall Rule (WAN) is configured as well.

      regarding Azure network NSG settings, on the private wan interface (IP : 10.20.2.10 ) of the pfsense VM i have allowed RDP port 3389 to windows OS VM (IP: 10.20.1.11). But the RDP is not getting connected from internet.

      other VMs in the lan subnet (10.20.1.0/24) can do RDP connection to this windows OS (and vice-versa). All these VMs in lan subnet has the 10.20.1.10 (LAN IP of pfsense firewall) as their default gateway, and these VMs can reach out to internet.

      Note : I have tried to connect via RDP to the same windows VM a direct public IP (temporarily leased from azure, outside the pfsense firewall), this connectivity also worked fine. but the port forwarding pfsense -> NSG part is not working.

      Can anyone tell me what went wrong here ? why the basic PAT is not working.

      V 1 Reply Last reply Reply Quote 0
      • V Offline
        viragomann @MtMt
        last edited by

        @MtMt said in pfsense plus on Azure - PAT not working:

        regarding Azure network NSG settings, on the private wan interface (IP : 10.20.2.10 ) of the pfsense VM i have allowed RDP port 3389 to windows OS VM (IP: 10.20.1.11). But the RDP is not getting connected from internet.

        Apart from this you have also to enable IP forwarding on all envolved pfSense interface in Azure.

        1 Reply Last reply Reply Quote 0
        • M Offline
          MtMt
          last edited by

          @viragomann

          thank you for the reply.

          I have enabled IP fowarding on both WAN and LAN interfaces of pfsense VM as well.

          Not sure where to focus my troubleshooting.

          I guess it is something related to the 'double NAT' (azure network layer <-> pfsense appliance). but i really cant spot the catch.

          Regards

          MT

          V 1 Reply Last reply Reply Quote 0
          • V Offline
            viragomann @MtMt
            last edited by

            @MtMt
            Also remember, that access to the RDP server is not allowed from outside of the subnet by default in Windows. You have to configure its firewall accordingly.

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