Hi,

Try to change another NTP server, meanwhile, you can change the DNS server as 8.8.8.8 to give it a shot. 

If still does not work, please show us some screenshots of these issues.

Thanks in advance, and have a nice day. 

Isra wrote

Can anyone help me understand why my router cannot connect to time server, cannot check latest firmware, cannot connect to TP-LINK cloud. But all connected devices are able to use the internet without problem.

Hi,

Thanks for your reply, could you please tell us the current serial number and Mac address of the router? 

Or you can take a picture of the bottom label and send it to us. 

Thanks in advance, and have a nice day. 

Hi Isra,

Thanks for your valued reply, glad to hear that it was fixed finally. 

From the picture you sent, the Archer C5400X works as an access point, and compared to regular wireless router mode, the C5400X does not support some advanced features in AP mode, like the cloud function, parental control and so on.

If need more help in the future, do not hesitate to contact us.

Have a nice day. 

Isra wrote

I think the problem was caused by initial setup as AP on the first day when I connected it on the old router. The next day I change the mode to router then connected it directly to the modem. Since after that, my C5400X was having problem connecting to the TP-link cloud, firmware check, or even anti-virus update. Then I decided to do factory reset and YES!!! Everything is ok now.

Hi Isra,

Thanks for your reply and cooperation. 

Please take your time to test it, and do not hesitate to contact us with any updates. 

Have a nice day.