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    Solved: Two factor authentication for admin login

    Scheduled Pinned Locked Moved General pfSense Questions
    33 Posts 9 Posters 31.9k Views
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    • emammadovE
      emammadov
      last edited by

      Where is Service-Type = Administrative-User?

      Elvin

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

        Your admin account would already have that set.. But you need to set under users manager to use your radius server not the local database.

        An intelligent man is sometimes forced to be drunk to spend time with his fools
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        • NogBadTheBadN
          NogBadTheBad @emammadov
          last edited by

          @emammadov

          Additional RADIUS Attributes (REPLY-ITEM) right at the bottom of the user you created in FreeRadius under the Advanced Configuration section.

          Andy

          1 x Netgate SG-4860 - 3 x Linksys LGS308P - 1 x Aruba InstantOn AP22

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          • emammadovE
            emammadov
            last edited by

            I have many users using openvpn. Then those users will not be able to connect through openvpn?

            Elvin

            NogBadTheBadN 1 Reply Last reply Reply Quote 0
            • NogBadTheBadN
              NogBadTheBad @emammadov
              last edited by NogBadTheBad

              @emammadov

              You want these many users to connect to the pfSense login page ?

              I use IPsec IKEv2 for a VPN solution so I add the following as an Additional RADIUS Attributes (CHECK-ITEM) NAS-Identifier == strongSwan, this basically only allows connection if the request has come from strongSwan and the VPN user ID.

              This basically disables users connected to my LAN using their FreeRADIUS accounts to log into the routers management page.

              If you ssh to your router and run a shell, then type in radsniff -x, then connect via OpenVPN, you'll see the NAS-Identifier output to the console.

              You'd need to create an account to log into the pfSense GUI and include Additional RADIUS Attributes (REPLY-ITEM) Service-Type = Administrative-User.

              I'd add the Additional RADIUS Attributes (CHECK-ITEM) NAS-Identifier == ?????? as a precaution to the OpenVPN users.

              Andy

              1 x Netgate SG-4860 - 3 x Linksys LGS308P - 1 x Aruba InstantOn AP22

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              • jimpJ
                jimp Rebel Alliance Developer Netgate
                last edited by

                pfSense won't care about Service-Type. It needs group membership or a username match.

                So you can have local users with the same usernames with appropriate permissions, or the much easier route, have groups on pfSense (like the default admins group) and then put something like this in the RADIUS user reply attribute:

                Class := "admins"
                

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                • jimpJ
                  jimp Rebel Alliance Developer Netgate
                  last edited by

                  Basically you want to be able to test that entry from Diagnostics > Authentication and when you login with the RADIUS credentials it should tell you that the user is a member of the admins group.

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                  • NogBadTheBadN
                    NogBadTheBad
                    last edited by NogBadTheBad

                    LOL yup I was looking at the wrong user๐Ÿ˜ฅ

                    Service-Type = Administrative-User is for my Linksys switches.

                    Andy

                    1 x Netgate SG-4860 - 3 x Linksys LGS308P - 1 x Aruba InstantOn AP22

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                    • emammadovE
                      emammadov
                      last edited by emammadov

                      I have 2 admins in our pfsense and other users for vpn.I selected Radius in Authentication Server in User Manager. But I still login with the username created in local database, plus I can't login with the username created in Radius. I checked credentials in Diagnostics, it says The following input errors were detected: Authentication failed.

                      Elvin

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                      • jimpJ
                        jimp Rebel Alliance Developer Netgate
                        last edited by

                        If RADIUS login fails it falls back to local users, so your local admin user in pfSense will still work. That is a safety measure so that you don't get locked out by a broken RADIUS server.

                        You need to concentrate on fixing the RADIUS settings if the authentication is failing, something there still isn't quite right.

                        Remember: Upvote with the ๐Ÿ‘ button for any user/post you find to be helpful, informative, or deserving of recognition!

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                        M 1 Reply Last reply Reply Quote 0
                        • emammadovE
                          emammadov
                          last edited by

                          Is there a tutorial for this? I have another question. if there is no internet, can I still login into pfsense web gio with two factor authentication?

                          Elvin

                          1 Reply Last reply Reply Quote 1
                          • jimpJ
                            jimp Rebel Alliance Developer Netgate
                            last edited by

                            @emammadov said in Two factor authentication for admin login:

                            Is there a tutorial for this?

                            https://www.youtube.com/watch?v=n2Z3rr4W2xw
                            https://www.slideshare.net/NetgateUSA/radius-and-ldap-on-pfsense-24-pfsense-hangout-february-2018

                            I have another question. if there is no internet, can I still login into pfsense web gio with two factor authentication?

                            Google Authenticator does not actually contact Google for anything. It's a mathematically calculated OTP value based on your own key, date/time, etc. It isn't actually tied to any Google service/account/login/etc. It's basically a Google-branded equivalent to mOTP.

                            Remember: Upvote with the ๐Ÿ‘ button for any user/post you find to be helpful, informative, or deserving of recognition!

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                            • emammadovE
                              emammadov
                              last edited by emammadov

                              Thanks. I tried and it worked. Along with the user created on Radius, I can also login with the user created on local database though I have chosen Radius in Authentication Server. You said it is a safety measure.
                              I have a question. I disabled webgui login for default local admin user "admin" and it works only on console. I wonder if Radius login fails, 1. can I add any user created on the local database to admins group on pfsense console and 2. enable webgui login for admin user?

                              Elvin

                              1 Reply Last reply Reply Quote 0
                              • jimpJ
                                jimp Rebel Alliance Developer Netgate
                                last edited by

                                The local user fallback will work for any local user, it doesn't need to be admin. You can grant that user whatever privileges you want them to have. If adding them to the admins group is what you want, that will work.

                                Remember: Upvote with the ๐Ÿ‘ button for any user/post you find to be helpful, informative, or deserving of recognition!

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                                • emammadovE
                                  emammadov
                                  last edited by emammadov

                                  I mean, I have disabled local admin user, so it can't login via webgui, it works only on ssh and console. If Radous server suddenly fails, how can I enable local admin user on SSH so that I can login via webgui!?

                                  Elvin

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                                  • jimpJ
                                    jimp Rebel Alliance Developer Netgate
                                    last edited by

                                    Yes, I know what you meant. What I'm saying is you can keep the actual "admin" account disabled and have some other local account you use instead that is always available for use.

                                    Forcing yourself to re-enable admin when RADIUS is down is not a proper or reliable process. You can do it by resetting the admin password from the console which should re-enable it, or try pfSsh.php playback changepassword admin from the shell.

                                    I wouldn't leave the firewall without some kind of active fallback authentication account though.

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                                    • emammadovE
                                      emammadov
                                      last edited by

                                      Thank you very much.

                                      Elvin

                                      1 Reply Last reply Reply Quote 0
                                      • M
                                        M0L50N @jimp
                                        last edited by

                                        @jimp Hi jimp.
                                        I just implemented that setup, and if I let the local admin user enable to dont be locked out, the problem is that we can always login with that user without 2FA. My other admin user in freeradius with "Class := "admins"" work well, but the one local continue to works too!

                                        I'm a little bit afraid to delete the local one. You said if Radius failed it will user local data base ... but if I dont have admin user in local database?!?!

                                        Thanks!

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                                        • jimpJ
                                          jimp Rebel Alliance Developer Netgate
                                          last edited by

                                          It will always fall back to local database if RADIUS is down or rejects the login, for safety. If that's a concern, set the admin password to something suitably long/complex and store it somewhere secure in case of RADIUS failure, but don't give the password to anyone else.

                                          Or just forget the password and reset it from the console if you ever need to get in locally.

                                          Remember: Upvote with the ๐Ÿ‘ button for any user/post you find to be helpful, informative, or deserving of recognition!

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                                          Do not Chat/PM for help!

                                          M 1 Reply Last reply Reply Quote 0
                                          • M
                                            M0L50N @jimp
                                            last edited by M0L50N

                                            @jimp
                                            I understand, but for security reason, it it not better to dont have local admin user? My goal to create 2FA admin access is to securise Admin access. If the local user still exist, even with a strong password, the possibility to brute force it exist?!?!?!

                                            Maybe I'm better dont use 2FA with my admin user, user really strong password and add rules to stop bruteforcing!?!?!

                                            What is your vision about that?

                                            Thanks for your advices!

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