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    Ecobee thermostat can’t connect to servers

    Scheduled Pinned Locked Moved General pfSense Questions
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    • E Offline
      ezhawk @GPz1100
      last edited by

      @GPz1100
      mine are all default in the firewall settings too. WAN mtu is actually just using the adaptors default. Don't have any defined MTU.

      GPz1100G 1 Reply Last reply Reply Quote 0
      • stephenw10S Offline
        stephenw10 Netgate Administrator @GPz1100
        last edited by

        @GPz1100 Are you able to grab a pcap for comparison with a working connection?

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        • GPz1100G Offline
          GPz1100 @stephenw10
          last edited by

          @stephenw10 What specifically do you want captured, and for how long? I can use the pf packet capture gui option but what options do you want set there?

          The ecobee is on the IOT vlan which only has rfc1918 access to dns server and internet.

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          • GPz1100G Offline
            GPz1100 @ezhawk
            last edited by

            @ezhawk said in Ecobee thermostat can’t connect to servers:

            @GPz1100
            mine are all default in the firewall settings too. WAN mtu is actually just using the adaptors default. Don't have any defined MTU.

            I understand, but since it is working with the other firewall, there must be some difference, no?

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            • stephenw10S Offline
              stephenw10 Netgate Administrator
              last edited by

              Just a typical TCP stream from the client to the server. Is it sending/receiving large packets every connection for example? Does the connection just remain open?

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              • GPz1100G Offline
                GPz1100 @stephenw10
                last edited by

                @stephenw10 Attached is a sanitized pcap. Ecobee mac and lan interace mac sanitized to begin with bb dd cc and lan mac begins with 11 22 33.

                sanitizedpacketcapture--20250828135527.pcap

                The capture is a 10 min segment of steady state operation.

                Note, the ecobee tries to resolve api.amazon.com every 50s. This is denied via dns server as well as blocking the entire amazon asn for the ecobee ip.

                Hope this helps.

                PS. please delete the previous message - it's already tagged as deleted, please remove permanently.

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                • stephenw10S Offline
                  stephenw10 Netgate Administrator
                  last edited by

                  Hmm, so it normally just holds open the TCP connection continually.

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                  • GPz1100G Offline
                    GPz1100 @stephenw10
                    last edited by

                    @stephenw10 That's why I asked what packages were installed. Perhaps something is interfering.

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                    • E Offline
                      ezhawk @GPz1100
                      last edited by

                      @GPz1100 @stephenw10
                      don't have too many installed.

                      5d6f7cb9-1ad1-49cd-8879-79f123b56857-image.png

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                      • stephenw10S Offline
                        stephenw10 Netgate Administrator
                        last edited by

                        Hmm, are you able to capture the initial connection from the client to the server?

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                        • E Offline
                          ezhawk @stephenw10
                          last edited by

                          @stephenw10
                          i have a pcap i took yesterday that i was capture while i rebooted the ecobee. trying to go through right now to see if any user/pass might of been passed not encrypted.

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                          • E Offline
                            ezhawk @stephenw10
                            last edited by

                            @stephenw10
                            i think it's clean of user/pass. is there a way i can send it without just posting it?

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                            • GPz1100G Offline
                              GPz1100 @ezhawk
                              last edited by

                              @ezhawk Other than the macs, I saw some exchanges include plain text tstat serial number (the PTR requests). Everything else I think is encrypted, at least between the tstat and ecobee. I can't comment on the amazon traffic as that's all blocked here.

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                              • E Offline
                                ezhawk @stephenw10
                                last edited by

                                @stephenw10
                                packetcapture-igc3.999-20250827170525.pcap

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                                • GPz1100G Offline
                                  GPz1100 @ezhawk
                                  last edited by

                                  @ezhawk Is there a pcap when it's acting up? Or was that the one on the previous page?

                                  E 1 Reply Last reply Reply Quote 0
                                  • E Offline
                                    ezhawk @GPz1100
                                    last edited by

                                    @GPz1100 that pcap is yesterday when i rebooted the ecobee and it can't connect to ecobee.com

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                                    • stephenw10S Offline
                                      stephenw10 Netgate Administrator
                                      last edited by

                                      Hmm, nothing there really looks like a routing problem. If you told me that was it working normally I would believe it.

                                      It has no problem connecting to home-fw.ecobee.com. Including with large packets. Though I note that's at a completely different IP than idt.

                                      It ARPs for 10.99.0.35. Do you know what that is?

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                                      • E Offline
                                        ezhawk @stephenw10
                                        last edited by

                                        @stephenw10
                                        That's my Home Assistant server. Ecobee is integrated via Apple HomeKit into HA.

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                                        • stephenw10S Offline
                                          stephenw10 Netgate Administrator
                                          last edited by

                                          Hmm, and I assume that continues to work fine even when it stops connecting to ecobee's servers?

                                          E 1 Reply Last reply Reply Quote 0
                                          • E Offline
                                            ezhawk @stephenw10
                                            last edited by

                                            @stephenw10
                                            Yes, there isn't any issue from HA to the Ecobee when the Ecobee cannot connect to the Ecobee servers.

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