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Thread: Evo WiFi Controller - Active TCP Sessions

  1. #1
    Automated Home Sr Member
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    Default Evo WiFi Controller - Active TCP Sessions

    Just had a need to do some work on our Internet Router (a Draytek) and noticed the Evohome Controller had over 300 active connections to the outside world.
    Seems a lot so I powered down the Controller and then let it run again for half and hour.
    Active TCP sessions above 200 again - all to the same host IPs but that many simultaneous connections? (204.141.57.101, 12.149.218.73 port 443)
    It must be swamping the Host Server.

    Anybody else confirm this via their Internet Router ? (NAT table or Data Flow Monitor)

  2. #2
    Automated Home Ninja
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    Are you sure they're active and not in TIME_WAIT?

    Unless it's causing you a problem, I wouldn't worry about it.

  3. #3
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    mine is the 20's, measured by the same method (Draytek data flow monitor).
    I haven't wiresharked it...

  4. #4
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    20's would make more sense - mine is back around 250... even if you allowed a couple of connections per 'device' (of whatever description or purpose) if should be sub-50...
    Time for Wireshark indeed.
    @sandyman
    What is the firmware version of your WiFi Controller?

  5. #5
    Automated Home Sr Member
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    application 01.00.02.01
    wifi 01.00.02.00

  6. #6
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    Check that you don't have your NAT timeouts set too short on your router. (Might not be adjustable)

    If the connection is idle for a long time the NAT table may time out the entries and force the controller to establish a new connection periodically. Depending on where you monitor the connections from (anywhere except the routers own NAT table) it may look like there are a lot of connections open at once but all but one of them will be dead!
    Last edited by DBMandrake; 21st February 2017 at 09:35 PM.

  7. #7
    Automated Home Legend paulockenden's Avatar
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    I'm seeing nine connections, all currently TIME_WAIT

  8. #8
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    Quote Originally Posted by paulockenden View Post
    I'm seeing nine connections, all currently TIME_WAIT
    If all the connections are in TIME_WAIT surely you don't have an active connection to the server ?

    On the other hand I did notice the iPhone app this morning saying that the servers were "down for maintenance", yet following the link to the website says everything is operational - take your pick.

  9. #9
    Automated Home Legend paulockenden's Avatar
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    Quote Originally Posted by DBMandrake View Post
    If all the connections are in TIME_WAIT surely you don't have an active connection to the server ?
    Quite. I was surprised.

  10. #10
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    Quote Originally Posted by paulockenden View Post
    Quite. I was surprised.
    I'll test mine at some point because I'm now curious. The easiest way for me to do that is set up one of my Pi's as a SoftAP for the Evotouch to connect to then I can intercept all its traffic and run tools like tcpdump on the Pi. Just a matter of trying to find the time to do it....

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