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

    How to do use this NAT?

    Scheduled Pinned Locked Moved HA/CARP/VIPs
    36 Posts 3 Posters 3.8k Views 3 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.
    • DerelictD Offline
      Derelict LAYER 8 Netgate
      last edited by

      No idea based on that description. Sorry. Please post more details.

      Chattanooga, Tennessee, USA
      A comprehensive network diagram is worth 10,000 words and 15 conference calls.
      DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
      Do Not Chat For Help! NO_WAN_EGRESS(TM)

      1 Reply Last reply Reply Quote 0
      • A Offline
        akong77
        last edited by

        Sorry.
        WAN1 -- 192.168.15.2/24 and gateway set to 1.2.3.254
        WAN1 have five CARP IPs.
        WAN2 -- 192.168.20.2/24 and gateway set to 5.6.7.254
        WAN2 have file CARP IPs.
        LAN1 -- 192.168.0.0/24
        LAN2 -- 192.168.10.0/24
        Outbound NAT set LAN1 to WAN2 CARP IP. Set LAN2 to WAN1 CARP IP.
        I set default gateway as WAN2.
        It's only LAN1 user can go to internet. LAN2 user can't go to internet.
        If I set default gateway is WAN1.
        It's only LAN2 user can go to internet. LAN1 user can't.
        How to set it?

        1 Reply Last reply Reply Quote 0
        • DerelictD Offline
          Derelict LAYER 8 Netgate
          last edited by

          You do not route traffic with Outbound NAT rules. You route traffic with policy routing rules.

          Set your Outbound NAT for all inside source addresses on both WANs to the proper CARP VIP.

          Policy routing determines what traffic flows out which interface.

          https://docs.netgate.com/pfsense/en/latest/book/multiwan/policy-routing-configuration.html#policy-routing-configuration

          Chattanooga, Tennessee, USA
          A comprehensive network diagram is worth 10,000 words and 15 conference calls.
          DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
          Do Not Chat For Help! NO_WAN_EGRESS(TM)

          1 Reply Last reply Reply Quote 0
          • A Offline
            akong77
            last edited by

            So in addition to setting the Outbound NAT to the CARP IP, also set the Gateway in LAN1 and LAN2's Rules, right?

            1 Reply Last reply Reply Quote 0
            • A Offline
              akong77
              last edited by

              Hello,
              I has set finish all WAN and LAN setting and success it. But I have another problem. I set openvpn on it and click on redirect ipv4 gateway this option. But when client connect openvpn server. It's can't go to internet. If I click off redirect ipv4 gateway. It's can go to internet. But it's use original IP. I has set firewall rules all allow for OPENVPN tab. Could any loss another setting?

              1 Reply Last reply Reply Quote 0
              • DerelictD Offline
                Derelict LAYER 8 Netgate
                last edited by

                Outbound NAT for the tunnel network source addresses. Again, the NAT address should be the CARP VIP just like for any other inside network.

                You also need to pass all traffic on the OpenVPN firewall rules.

                Chattanooga, Tennessee, USA
                A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                Do Not Chat For Help! NO_WAN_EGRESS(TM)

                1 Reply Last reply Reply Quote 0
                • A Offline
                  akong77
                  last edited by

                  Thanks a lot. I have another question. I has set some NAT setting.
                  NAT Reflection mode --> PureNAT
                  Enable NAT Reflection for 1:1 NAT --> check on.
                  Enable automatic outbound NAT for Reflection --> check on.
                  But user can't browser intranet web page when this web page resolve IP is CARP IP.Could I miss another setting?

                  1 Reply Last reply Reply Quote 0
                  • DerelictD Offline
                    Derelict LAYER 8 Netgate
                    last edited by

                    Doesn't sound like it. Split DNS is generally considered a more effective solution.

                    But it depends. You'll have to post everything including the firewall rules for the interface the users are sourcing from.

                    Chattanooga, Tennessee, USA
                    A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                    DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                    Do Not Chat For Help! NO_WAN_EGRESS(TM)

                    1 Reply Last reply Reply Quote 0
                    • A Offline
                      akong77
                      last edited by

                      I got some pic about firewall rules.
                      Please see attachment.
                      WAN1.PNG WAN2.PNG LAN1.PNG LAN2.PNG
                      I have not set any block rules. Could have any problem?

                      1 Reply Last reply Reply Quote 0
                      • DerelictD Offline
                        Derelict LAYER 8 Netgate
                        last edited by

                        What, specifically, is not working?

                        Chattanooga, Tennessee, USA
                        A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                        DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                        Do Not Chat For Help! NO_WAN_EGRESS(TM)

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