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

    PfSense as Internal LAN Certificate Authority

    Scheduled Pinned Locked Moved General pfSense Questions
    4 Posts 3 Posters 2.0k 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.
    • F Offline
      Fahrenhe1t
      last edited by

      I've been reading about how you can promote pfSense be a Certificate Authority for all machines on your LAN.  I was thinking this would be a good idea to build in some extra security into the environment, and enable WPA2-Enterprise for wifi.  CSR's could be generated on clients, then signed through the pfSense shell.  I'm not looking to have self-signed certs for external device connections, except for OpenVPN.  However, I also have read some articles saying that your Certificate Authority (CA) should be on a machine that's not on the network, and locked in a safe.

      In trying to harden a home network, is it advisable to promote the pfSense firewall as the internal CA?  Or is it too risky due to potential key compromise, and only promote a CA that is completely air-gapped?  Thanks!

      1 Reply Last reply Reply Quote 0
      • johnpozJ Offline
        johnpoz LAYER 8 Global Moderator
        last edited by

        Air Gapped for a home network?  That is one really freaking tight tin foil hat to be sure..

        I use eap-tls via wpa enterprise for my wifi devices, laptops, phones, ipad, etc.. Who exactly do you think is going to compromise your CA??  Is the black helicopter ninja's going to come into your house?  Maybe the Chinese hackers really really want on your wifi network?

        Lets say they did get on the wifi, they should still be isolated from the rest of your network.

        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

        1 Reply Last reply Reply Quote 0
        • F Offline
          Fahrenhe1t
          last edited by

          @johnpoz:

          Air Gapped for a home network?  That is one really freaking tight tin foil hat to be sure..

          I use eap-tls via wpa enterprise for my wifi devices, laptops, phones, ipad, etc.. Who exactly do you think is going to compromise your CA??  Is the black helicopter ninja's going to come into your house?  Maybe the Chinese hackers really really want on your wifi network?

          Lets say they did get on the wifi, they should still be isolated from the rest of your network.

          Well, just reading these forums alone, I've seen people mention they've been hacked, so it's not out of the realm of the possible.  That being said, I was curious about the best practice for this scenario, the practicality of the solutions, and what others have done.  I recently implemented pfSense at home.  My Netgear Nighthawk router\AP was providing firewall\DHCP\wifi\LAN previously, now I've simply bridged it to the pfSense machine…so all clients are still on the same LAN for now.  Sounds like that is not advisable.  But promoting pfSense to be the internal CA is something others do, and is advisable for home use?

          1 Reply Last reply Reply Quote 0
          • F Offline
            fragged
            last edited by

            If you want a more secure CA you should look into something that supports CRL's to be fetched from outside the device. Also set up an offline root CA (a virtual machine on a crypted drive, never attached to the internet or something similar) and a intermediate CA that is available for signing and CRL's. The offline root CA is only used to publish a new CRL for the intermediate CA.

            Then again.. is there any point of doing this for home use? Probably not..

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