I have new information at the bottom.
Make sure the 2.4GHz Wifi does not operate in some sort of guest mode. Guest wifis usually allow clients to browse the web without any issues, but prohibit connections to internal devices. There also could be a filter enabled on the network if it’s not a guest mode. At least my router allows me to specify to which types or targets (web, email etc.) clients are allowed to connect. So like a guest wifis without that being separate from the regular wifi.
I have a guest mode, but its turned off. if i turn it on, its a separated SSID,. But it’s not the case.
I check the Firewall segurity level where i have 3 default states, Hight, medium and low. I tried all 3 and nothing. There is another state, personalized. Inside i have this:
I think its ok for what i need, but it does not work either
No, don’t make the the SSID names the same. What I was suggesting is that perhaps the network settings for the two networks are somehow different. Maybe the 5Ghz network is setup to only give access to the internet, but not to other PCs on the same network. This is a common setting on many home routers, so I would check there as well
I did that just to try something.
Marked in bold of your message, this is interesting. I did a test, i turned off the ethernet from my computer and i connected to both wifi (2.4g and 5g). And i check 3 things:
Connected to 5G:
Hassio Frontend: OK
\\hassio: OK
Accesing to My Computer > Networks: I can see other PCs from my network.
Connected to 2.4G:
Hassio Frontend: Don’t load (like in phones)
\\hassio: Error, can't find.
Accesing to My Computer > Networks: Can’t find, empty.
So yes, 2.4G wifi don’t let me see others PCs connected to network… I check every option on my router and didn’t see nothing about this topic… I will check again focusing on that.
If you know where i must check, tell me xD
Thanks for the help guys, we know where is the problem, lets see how to solve it.
EDIT. If it helps, 2.4G is on 802.11bgn and 5G is 802.11ac.
EDIT 2: Ok, the option i’m looking for is AP Isolation, no luck for now…
EDIT3: Called to my FTTH company and says that option is turned ON yes, but its not configurable for the user… Now I understand why i did not find the option… They will try to configure this option exclusively for my router remotely… let’s see if that is true. If not i think i will need to buy another router. While waiting, if you have any router recomendation i will be glad to hear it. I have FTTH 1GB symmetric.