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    Help with newbie and firewall

    Firewalling
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    • Z
      znelbok
      last edited by

      i will start by prefacing that I know very little about firewalls, and networks.

      I am running pfsense to test out some ideas and I am running into some firewall issues that I have not been able to work out.

      Here is the setup

      pfsense has three NIC's, LAN, WAN and opt1

      internet–------router2---------------------------Workstation3(opt1)
                                                                              |
                                                    ---------------pfsense-----------Workstation1 (LAN)
                                                    |
        internet--------modem (sat)-------router1---------------------------Workstation2(LAN)

      This is setup this way so that I dont have to disrupt the home network while testing the LAN to WAN connection through pfsense.

      Simplified it is really this that I am working on

      router2---------------------------Workstation3(opt1)
                            |
                          pfsense-----------Workstation1 (LAN)

      So WS1 has pfsense as its gateway
      WS2 has the router2 with as its gateway to the internet
      router1 has a static route to pfsense to allow WS2 to see opt1 subnet. (part of a separate test)
      WS1 can see (ping, share files etc) with WS3 on opt1
      WS3 can see (ping, share files etc) with WS1 on LAN

      Now my question
      How I stop it from working?
      Where do I setup the firewall rules to say only allow ftp from LAN to opt1
      WS3 has a ftp server running and so far everything I have tried has not worked in preventing it from working and/or restricting it to ftp only

      Here is what I have setup for the opt1 firewall - it blocks everything but nothing is really being blocked as I can still connect from both WS1 and WS2 (with static route enabled)

      Thanks

      Mick

      fwrule1.JPG
      fwrule1.JPG_thumb

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      • Z
        znelbok
        last edited by

        Yes, I had a block all to try and stop it working, but it still worked.

        How would I be circumventing controls by pfsense?

        There is no bridging of interfaces.  WS3 uses pfsense as the gateway so it can get to WS1 (and WAN for the test)  It is a static IP only.

        It would appear that once a connection was made, and further connections were allowed, even if the firewall was changed to prevent it.

        I have made some progress but still need clarification.

        Where do I put the rules to control the flow of data between opt1 and lan?

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