OpenGarage Forums OpenGarage Firmware Strange network traffic?

This topic contains 4 replies, has 3 voices, and was last updated by  jagos 4 months, 3 weeks ago.

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  • #1225

    fokcuk
    Participant

    Hello
    I have logged a few requests for help, but still having issues with my OG device. It worked great for some time but now very unresponsive – best to describe it is if you were right on the edge of your Wifi signal and having a huge packet loss.
    Nothing has changed and when it was working – it was great and stable. Now it cannot even connect to Blynk and if I use it on the local network is feels like I described earlier.
    Anyway. I decided to do a tcpdump on my wifi router to see what is going on with it.
    See below for the few snippets of the output:
    13:19:35.858743 IP 192.168.1.201.4096 > resolver1.opendns.com.domain: 193+ A? time.nist.org. (31)
    13:19:35.859119 IP resolver1.opendns.com.domain > 192.168.1.201.4096: 198* 1/0/0 A 10.0.0.1 (47)

    13:19:41.033358 IP 192.168.1.201.4096 > resolver1.opendns.com.domain: 29+ A? blynk-cloud.com. (33)
    13:19:41.033912 IP resolver1.opendns.com.domain > 192.168.1.201.4096: 29* 1/0/0 A 10.0.0.1 (49)
    13:19:41.035558 IP 192.168.1.201.21502 > 10.0.0.1.8442: Flags [S], seq 6035785, win 5840, options [mss 1460], length 0

    192.168.1.201 is the IP address as it is set on the OG as a static address. OG does not have an option to set DNS server IP, and it tries to connect to resolver1.opendns.com. But how does it know what IP address is that? And why does it get 10.0.0.1 as a returned IP? Is the the default if it fails?
    Ray, can you check it out?

    #1237

    Ray
    Keymaster

    We can probably add an option to customize the DNS IP as well. But generally we don’t recommend setting static IP on Opengarage — I know this is provided as an option, but we recommend you to use the DHCP reservation feature on your router to assign a fixed IP to the device. This way the DNS IP is assigned by the router and you don’t have to put it in manually on Opengarage.

    #1266

    fokcuk
    Participant

    Hello
    I usually do set to DHCP, but when things have issues with router/wifi compatibility you’d want to set it to manual. If you can add it to the next release that would be great! Maybe also add the NTP settings too.
    Not everyone runs it internet connected and if it cannot get to somewhere it keeps trying, which makes it very unresponsive

    #1279

    Ray
    Keymaster

    You said “Not everyone runs it internet connected” — but I don’t understand the point of using OpenGarage if it’s not Internet connected — I mean, without the ability to remotely monitor and control the door, how is this different from a standard, non-WiFi based garage door remote?

    #1282

    jagos
    Participant

    I suspect “internet connected” means to the internet at large as opposed to just the local home network. I use mine this way sandboxed in an isolated vlan where it can respond to local net requests but not initiate them. The one exception is I allow it to the internet for dest port 123 so it can get the time. I could run a local NTP server but there is no way to specify that to the OG which I think fokcuk is referencing.

    For true remote access, I connect to my home network with a vpn so I can get “local” access to my OG. I also wrote a bash script that monitors my OG and sends email and/or SMS on certain conditions which I can get remotely of course. I have just started playing with MQTT with a local server and am getting the OG messages. I intend to write a client watcher in javascript under nodejs to replace the bash script but haven’t gotten to that yet.

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OpenGarage Forums OpenGarage Firmware Strange network traffic?