@Vedia Just out of interest Is your port 7547 open on the device ? Have you tested that from an external network ?

@Quzkaa You can do that by setting one of the devices as an access point (wired extender) - connecting the devices by ethernet cable - here's the guide. You can have same SSID throughout the house on...

@TEZ_187 When adding port forwarding range, omit the Internal port entry and just click on Save:

@Alopey Here's my theory: Bandwidth control is applied on the WAN (Internet) port of the device (ethernet backhaul). In WDS mode the device is using a wireless backhaul hence the bandwidth control is...

@MasterR Some of newer devices have that feature enabled by default.

@user91 The standard way for communication with the time servers should be on UDP 123. But that should be confirmed by TP-Link. I believe the quickest way to exclude ISP problem is to try the device...