Hi all,

I have a Technicolor TG784n v3 router and have two devices connected to it via Wifi on the same LAN (A: 192.168.1.78 and B: 192.168.1.80).

I have a service running on port 10001 on device A which device B can not connect to (just a telnet test to the port). I can't even ping device A from device B, and vice versa.

However, I then tried connecting both devices to another wifi AP (cisco), and I am able to telnet to port 10001 on device A from device B and can also successfully ping.

Does the TG784n have some sort of strict ruleset even for connected devices sitting on the same LAN? If so, I would really appeciate pointers on how to get rid of it.

Thanks in advance!

try loggin into the router admin page and look at services or something similar and see if icmp and etc services are blocked

Probably due to ap/client isolation enabled. Check if there such setting in your router. I don't have this router so can't help you with that.

I checked the settings and there isn't any AP/client isolation setting, which is super inconvenient for a home network. Bad choice of routers from Maxis... I've read how some people just cascaded another AP after the router just to overcome this issue... Thanks for trying to help.

On home WiFi routers, it is commonly enabled by default for guest network and on some you can't even disable it.