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    What is the biggest attack in GBPS you stopped

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    General pfSense Questions
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    • F
      firewalluser
      last edited by

      @tim.mcmanus:

      dtrace is installed already on pfSense.

      Go to the FreeBSD forums now.  You're not dealing with pfSense anymore when you start working with dtrace.  This is the wrong place to look for that kind of guidance.
      I think I'm having déjà vu….

      Significance might not have registered. Apologies.  :o

      Capitalism, currently The World's best Entertainment Control System and YOU cant buy it! But you can buy this, or some of this or some of these

      Asch Conformity, mainly the blind leading the blind.

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      • T
        tim.mcmanus
        last edited by

        dtrace stuff.  Remember, dtrace is a component of the FreeBSD distribution, so you need to go there to understand it and get support from the community.  These forums are more product-specific for pfSense–mostly dealing with networking versus deep coding.  So you're questions are best answered in the FreeBSD forums.

        https://wiki.freebsd.org/DTrace

        https://wiki.freebsd.org/DTrace/Tutorial

        http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/dtrace.html

        http://www.brendangregg.com/USEmethod/use-freebsd.html

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        • T
          tim.mcmanus
          last edited by

          Smoking gun?

          https://forums.freebsd.org/threads/freebsd-10-1-network-unaccessible-after-high-traffic.51743/

          Potential fix? (synproxy state)

          https://forums.freebsd.org/threads/enabling-ipv6-eventually-freezes-the-gateway.47959/#post-267820

          See #4 from this link:

          http://www.onlamp.com/pub/a/bsd/2004/04/15/pf_developers.html

          https://forums.freebsd.org/threads/freebsd-9-0-release-syn-flood.29071/#post-163533

          Notice how all of this freakin' awesome information is coming from the FreeBSD forums.  I strongly suggest you consolidate your findings in this thread and move the discussion over to the FreeBSD networking forums.  They have dozens of discussions on SYN floods with some excellent guidance given.

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          • S
            Supermule Banned
            last edited by

            Yes. It just doesnt work as expected.

            Until the drop in traffic occurs. So I need to find a way to see whats initiated when the traffic drops.

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            • T
              tim.mcmanus
              last edited by

              @Supermule:

              Yes. It just doesnt work as expected.

              Until the drop in traffic occurs. So I need to find a way to see whats initiated when the traffic drops.

              https://forums.freebsd.org/forums/networking.7/

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              • S
                Supermule Banned
                last edited by

                Yes….one more forum to watch....................... :D

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                • S
                  Supermule Banned
                  last edited by

                  Just a small update..

                  Changed NIC's to vmxnet3 in vmware and this happened.

                  Youtube Video

                  Same traffic drop but curves are different. On E1000 they follow each other. On vmxnet3 they are totally seperated. Red is 15mbit/s and black is almost zero.

                  Suddenly then traffic drops on incoming WAN and it begins to flow traffic and respond to ping for Google DNS.

                  No change what so ever to anything.

                  vmxnet3 drivers are much worse handling this kind of attack than the E1000 drivers.

                  EDIT: When Core nr 3 drops, the FW comes alive and begins to route packets. Overall load is cut in half.

                  EDIT EDIT:  Getting 100% interrupt in the top -HSP on the console. Again the E1000 almost had zero.

                  Logs are flooded with this.

                  | Jun 7 19:54:14 | check_reload_status: Reloading filter |
                  | Jun 7 19:54:14 | check_reload_status: Restarting OpenVPN tunnels/interfaces |
                  | Jun 7 19:54:14 | check_reload_status: Restarting ipsec tunnels |
                  | Jun 7 19:54:14 | check_reload_status: updating dyndns Yousee |
                  | Jun 7 19:54:01 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:53:49 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:53:43 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:53:38 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:53:33 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:53:28 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:53:22 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:53:15 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:53:06 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:53:01 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:52:56 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:52:51 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:52:45 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:52:40 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:52:35 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:52:28 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:52:23 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:52:18 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:52:13 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:52:07 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:52:02 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:51:56 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:51:50 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:51:46 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:51:40 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:51:34 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:51:29 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:51:24 | check_reload_status: Reloading filter |
                  | Jun 7 19:51:24 | check_reload_status: Restarting OpenVPN tunnels/interfaces |
                  | Jun 7 19:51:24 | check_reload_status: Restarting ipsec tunnels |
                  | Jun 7 19:51:24 | check_reload_status: updating dyndns Yousee |
                  | Jun 7 19:51:22 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:51:16 | kernel: vmx0: watchdog timeout on queue 0 |
                  | Jun 7 19:51:11 | kernel: vmx0: watchdog timeout on queue 0 |

                  traffic_drop3.PNG
                  traffic_drop3.PNG_thumb
                  vmxnet3_vmwareload.png
                  vmxnet3_vmwareload.png_thumb
                  interrupts_vmxnet.PNG
                  interrupts_vmxnet.PNG_thumb

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                  • F
                    firewalluser
                    last edited by

                    And an update from me.

                    Currently downloading and getting 5.42Mbps according to the dashboard, yet when you did the ddos the otherday that was only giving showing 2.42Mbps.

                    So why does a ddos cause my bandwidth to drop down? Could it be related to this post https://forum.pfsense.org/index.php?topic=94903.0 ie a hw issue, or is freebsd or pfsense.

                    I have a huwei supplied router dont know if it can go into modem only mode, but if it can I will check the speeds again with this device if you dont mind doing a Britney Spears and hit me one more time?  ;)

                    Capitalism, currently The World's best Entertainment Control System and YOU cant buy it! But you can buy this, or some of this or some of these

                    Asch Conformity, mainly the blind leading the blind.

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                    • S
                      Supermule Banned
                      last edited by

                      No problem.

                      Let me know when youre ready and what IP/port it is.

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                      • S
                        Supermule Banned
                        last edited by

                        .-….........

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                        • H
                          Harvy66
                          last edited by

                          How resilient? No longer an issue for established connections as long as there is enough bandwidth, kind of resilient? You tone makes it sound as if it is effectively fixed. Time to party?  8)

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                          • S
                            Supermule Banned
                            last edited by

                            EDIT: It was my bandwith that caused to attacked IP to survive.

                            No change in resilience. (Sorry).

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                            • H
                              Harvy66
                              last edited by

                              @Supermule:

                              EDIT: It was my bandwith that caused to attacked IP to survive.

                              No change in resilience. (Sorry).

                              It was your bandwidth? Isn't that the goal? The weakest link should be the bandwidth, not the firewall, yes? What issue(s) still remain? Same?

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                              • S
                                Supermule Banned
                                last edited by

                                As soon as I was able to push 10mbit/s out on my private line, then it failed again….

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                                • H
                                  Harvy66
                                  last edited by

                                  So 10Mb/s of special traffic against your greater than 10Mb/s link caused the link to fail? Did the firewall stop working or only the link go down?

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                                  • S
                                    Supermule Banned
                                    last edited by

                                    Firewall stopped routing traffic. Link was fine.

                                    Lots of packetloss once again.

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                                    • H
                                      Harvy66
                                      last edited by

                                      So same issue as before, firewall is the weakest link, not the bandwidth? Maybe 2.3.

                                      Any news from the FreeBSD side of things?

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                                      • S
                                        Supermule Banned
                                        last edited by

                                        Not yet. They are digesting the attack that I did yesterday and curretnly looking at states not beeing freed as they should…. AFAIK.

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                                        • T
                                          torontob
                                          last edited by

                                          Did this end up in nowhere with the issue still being there?

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                                          • S
                                            Supermule Banned
                                            last edited by

                                            Still working on it.

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