Cannot connect Shelly 2 PM anymore

Third party integrations
1

Hello community, I have several Shelly models currently working without any issue. Now I’m facing issue with 4 Shelly 2 PM that worked find until last 3 hours. Other shelly works perfect.
I’m using native Shelly integration and I didn’t update HA or Shelly firmware… I don’t know what happen, and from debug I can read the following:

2023-11-20 20:05:48.409 DEBUG (MainThread) [aioshelly.rpc_device.wsrpc] Trying to connect to device at 192.168.2.59
2023-11-20 20:05:48.427 DEBUG (MainThread) [aioshelly.rpc_device.device] host 192.168.2.59: error: DeviceConnectionError(DeviceConnectionError(WSServerHandshakeError(RequestInfo(url=URL('http://192.168.2.59/rpc'), method='GET', headers=<CIMultiDictProxy('Host': '192.168.2.59', 'User-Agent': 'HomeAssistant/2023.11.2 aiohttp/3.8.5 Python/3.11', 'Upgrade': 'websocket', 'Connection': 'upgrade', 'Sec-WebSocket-Version': '13', 'Sec-WebSocket-Key': 'RNsXQp5TFdxYZOuT4aRaYQ==', 'Accept': '*/*', 'Accept-Encoding': 'gzip, deflate')>, real_url=URL('http://192.168.2.59/rpc')), (), status=400, message='Invalid response status', headers=<CIMultiDictProxy('Content-Length': '20', 'Server': 'ShellyHTTP/1.0.0', 'Date': 'Mon, 20 Nov 2023 19:05:48 GMT', 'X-Cache': 'MISS from localhost', 'X-Cache-Lookup': 'MISS from localhost:3128', 'Via': '1.1 localhost (squid/5.9)', 'Connection': 'keep-alive')>)))

Could someone help me to understand what’s wrong?
Thank you
Lucas

2

If your router has multiple subnets, you should check that the router didnt assign it a different IP address.

3

Nope, I can reach, from HA, via ping the shellies (they have all static ip) and I can reach them also via web page. The only issue is that I can’t configure them anymore in HA.

In the above example, Shelly has 192.168.2.59 as IP and it worked perfect until yesterday.

4

It looks like you are on the latest HA.
Maybe update the shellys too?

5

Unfortunately the Shellys 2 PM are at latest firmware

6

Damn! Fixed.
I had activated the squid proxy on my PfSense and for some unknown reason it blocks connection between GREEN and BLU ONLY for Shelly 2 PM. So that HA cannot reach it anymore apart from ping. This is a very strange behaviour, I need to deep investigate on it.
Sorry to waste forum space!