IoT Wifi Device Doing .MIL ARP probe then fails to connect
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I have an Anova Precision sous vide machine that I'm trying to connect to wifi through the Android App. However it always fails to connect. Doing a packet capture on pfSense as it's trying to connect, the only packets I can see are ARP probe requests for 6.50.31.144.
This is strange for a few reasons:
- The IP belongs to a .mil IP block
- AFAIK this ARP probe will never work unless it was done on the WAN interface
Can anybody help me figure out what this device is trying to do and why it would be doing these ARP requests for this IP? The device MAC vendor is
f0:fe:6b:XX:XX:XX.Example of packet capture:
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- it would never work on the wan either, unless you were actually connected to some 6.x.x.x network where that IP address was on the L2 your connected too.
f0:fe:6b = Shanghai High-Flying Electronics Technology Co., Ltd
Never heard of them...
So it connects to your wifi, does it get an IP on your network? And then the only thing it sends is that arp? Maybe that is something hard coded in its stuff looking for a firmware update or something or boot options..
While yes 6.0.0.0/8 is a dod address. It is not uncommon for companies to use that space on their own network.. A previous company I worked for (very large msp) used many of the /8 ranges from the dod in their DCs.. Yup some were 6.x.x.x
What you could do - is set up a 6 network and give something that IP, to see what it sends it after its gotten back an answer to its arp. Which may give you some clue..
Other than curiosity to what its actually doing, I would just return it, or have them send a replacement. Did it ever work? Is it old and your just now trying to connect it to the network?
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It never gets an IP as far as I can tell. When I do a packet capture on the AP I can see it it authenticates for a few seconds and then gets deauthed by the AP and that happens in a loop for a bit until the phone app says it can't connect.
It used to work back when I first bought it ~2016. IIRC I had a different brand AP and router though.
I've tried connecting it to a wifi hotspot on my phone to rule out local networking gear, but it doesn't connect that way either.
That's not a bad idea, I could try to get that ARP reply working and see what happens. Is there a way to get pfsense to reply instead of having to setup the network and device?
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@baketopher said in IoT Wifi Device Doing .MIL ARP probe then fails to connect:
an see it it authenticates for a few seconds and then gets deauthed by the AP
why would it be getting deauthed? Is it possible it just doesn't work with the security your using, wpa3 maybe? Most iot type devices have no support for wpa3 as of yet..
I would setup ssid that is just basic wpa2 (sure it would support that) but if not try wpa1 even..
But yeah once you can actually get it on yoru wireless network - you could just set that IP as a vip on the interface your wifi is connected to, and it should answer the arp.. But it never even asks for dhcp etc.. It should be able to stay authed.
Another way to test, do you have your old AP - just connect it at the same time - does it connect to that one?
