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    Blocking SSH - Firewall Rule Troubles - SOLVED

    Scheduled Pinned Locked Moved Firewalling
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    • T
      tha_toadman
      last edited by

      That's what I had done originally…

      I did the same. My rules don't seem to work after I enable the SSH server via the checkbox.

      Floating:
      block    IPv4 TCP/UDP * 22 (SSH) WAN address 22 (SSH) * none

      WAN:
      block    IPv4 TCP/UDP * 22 (SSH) WAN address 22 (SSH) * none

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      • A
        acherman
        last edited by

        I just added the rules again and changed the port back to default 22.  You can try to SSH to 64.141.125.250, .251 or .254 (CARP).

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        • T
          tha_toadman
          last edited by

          I just added the rules again and changed the port back to default 22.  You can try to SSH to 64.141.125.250, .251 or .254 (CARP).

          They are all open. Sounds like your rules aren't working either.

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          • johnpozJ
            johnpoz LAYER 8 Global Moderator
            last edited by

            Source is not going to be 22  source could be ANY, and ssh is not UDP..

            And yes that is open!! on the 250, 251 and 254

            login as:

            Password for admin@router1.morad:

            251 shows
            steve.morad

            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
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            • T
              tha_toadman
              last edited by

              Ah, yep. Good point. I'll make the change and try again.

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              • johnpozJ
                johnpoz LAYER 8 Global Moderator
                last edited by

                dude you should not have to put in any rules.. There is a default DENY!!  Are you allowing traffic in like the OP?

                if your going to block it has to be above your allow rule - post your rules.

                If you have an allow for that segment, then above it put in a block to those specific addresses.

                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 2.7.2, 24.11

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                • A
                  acherman
                  last edited by

                  For me, I pretty much never put in a source port.  As others have said, they are usually random, so no point.  And also, I put them right at the top - since they are handled from the top down, start with the most specific and go from there.

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                  • A
                    acherman
                    last edited by

                    My DMZ, or Public routed interface rules look like this now…

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                    • johnpozJ
                      johnpoz LAYER 8 Global Moderator
                      last edited by

                      so anherman - are you rules in place to block it then?  Cuz they are still open.  2 all 3 IPs.

                      So you have a 1:1 nat setup or something?  Or your just routing the traffic?

                      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 2.7.2, 24.11

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                      • A
                        acherman
                        last edited by

                        Yup, those rules are active.  No, no 1:1 set up at all.  I do have some inbound stuff set up, but specific ports like 21, 80, 443, etc.  Although I do have a couple that I have all ports forwarded to 3 customer devices, just because I don't know what ports they use - those are the ones noted in the middle of the WAN rules (noted as BCM access).  But those are other IPs.  Dumb question, how can I see what IP's they are trying to get authed on?  My pfflowd packages aren't  working, so I'm not sure how to look.

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                        • T
                          tha_toadman
                          last edited by

                          For me, I pretty much never put in a source port.  As others have said, they are usually random, so no point.  And also, I put them right at the top - since they are handled from the top down, start with the most specific and go from there.

                          Yeah it was towards the end of the day when I put that original rule in. I've since modified it to read as:

                          block  IPv4 TCP * * WAN address 22 (SSH) * none

                          I've corrected both the Floating and the WAN but I'm still telling you, SSH is open. The default deny isn't working in this case. Once that SSH server is enabled, it's WAN accessible on my box.

                          My top 3 rules on the WAN tab (apologies on the formatting):

                          block *            Reserved/not assigned by IANA * * *                         *        *   * Block bogon networks
                          block *         Private_Networks                      * *      *                         *      none (custom rule)
                          block IPv4 TCP *                                         * WAN address 22 (SSH) * none Block SSH remote access

                          I don't have any 1:1 going either.

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                          • johnpozJ
                            johnpoz LAYER 8 Global Moderator
                            last edited by

                            ok heres another thing - once you create the rules to block.  You have to kill the states.. So for example got in.. You need to kill all the states from my IP, or flush them all.  Or have to wait til they expire.

                            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 2.7.2, 24.11

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                            • A
                              acherman
                              last edited by

                              I actually added the rules, and then I turned SSH on and back to 22.  Would that have not allowed the states to begin with?  Or no?

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                              • johnpozJ
                                johnpoz LAYER 8 Global Moderator
                                last edited by

                                no that would not have flushed the states in the firewall.  That just tells the box to listen or not listen.

                                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 2.7.2, 24.11

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                                • A
                                  acherman
                                  last edited by

                                  Okay, I just reset all states - that should confuse some people.  I will watch the logs now…

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                                  • johnpozJ
                                    johnpoz LAYER 8 Global Moderator
                                    last edited by

                                    so you do understand its not just ssh that is open

                                    pfsenseopentopublic.png
                                    pfsenseopentopublic.png_thumb

                                    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 2.7.2, 24.11

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                                    • johnpozJ
                                      johnpoz LAYER 8 Global Moderator
                                      last edited by

                                      If you PM a login - I would be happy to take a look to what is going on.

                                      And ssh is still open..  If you flushed the states..  You go something major issue here..  Either your rules are not being applied or you have something that in front of it allowing it.

                                      pfctl -sa

                                      Lets take a look at the rules..

                                      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 2.7.2, 24.11

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                                      • A
                                        acherman
                                        last edited by

                                        PM sent.  Thanks John.

                                        Just joking.  Apparently I hit the email button instead.

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                                        • DerelictD
                                          Derelict LAYER 8 Netgate
                                          last edited by

                                          I don't even know where to start with what's wrong with your rules.  You might want to start over.

                                          Of course everything is open.  You are connecting to something on PUBLIC net.  He has pass any any rules for that subnet from WAN1/WAN2.

                                          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)

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                                          • johnpozJ
                                            johnpoz LAYER 8 Global Moderator
                                            last edited by

                                            Ok first thing I see is you have that allow any any rule on multiple interfaces..  So wan_shaw has any any to public net, and there is no blocks on that interface.  So when I do a trace to that IP I hit..

                                            13    49 ms    49 ms    47 ms  66.163.70.2
                                            14    55 ms    52 ms    64 ms  64.141.125.254

                                            What what connection is that 66.163.. So you have that allow on all your interfaces?

                                            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 2.7.2, 24.11

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