@Mehmet-Karaman. Hello, detailed issue description including the TP-Link device model as well as its hardware version will help a lot in addressing the issue, so don't hesitate to provide as more...

@Besart Hello, May I know the hardware version of your C6, is it EU or US? Please show us the bottom label if possible, thanks. When it runs the latest official firmware, can you please check again...

@SuryaN Hello, Do you still use the original power adapter? Was there any power cut or bad weather or firmware upgrading before it behaves abnormally? Try to hard reset it one more time by holding...

@TallGamer Hello, Please refer to the below troubleshooting guide to check some basic settings: Why port forwarding feature is not working on my router? If still no help, please provide the below...

@AHITMAN Hello, thanks for reporting this issue to the community. Please try to disable the QoS function on the AX6000 first, restart the router, and confirm again. If possible, try to factory reset...

@Pneulegend Hello, Below is a setup video for your reference to install your wireless router: https://www.tp-link.com/support/setup-video/ But if you still failed, please refer to the troubleshooting...