@Anthony1001 I think you may need a managed switch (ie SG2008 or better) to implement a working ACL, which I would do as a Switch ACL. You can try as an EAP ACL (which doesn't have the bidirectional...

@slamjam Many cellular modems don't work correctly if you don't allow them to assign their clients IP via DHCP, just saying. From what I understand: (some TIM IP) -->5G Modem--(NAT)..192.168.97.1...

@Anthony1001 As I understand it, even though the clients may 'see' each other, they are not permitted to establish point to point connections to other clients on private IPs. So I might see your...

@KaZyKa Correct Dynamic, as show in above image, not Static as shown in the first image. Make this setting Dynamic and reboot the modem, and it should come back up with your correct static IP on the...

@KaZyKa Controller: Wired Networks-> WAN Yes, leave your modem in bridge mode.

@KaZyKa So what's the harm in using DHCP then?