@adan123, thanks, I remember when it happened dhcp and internet access was ok, my computer has ip and can access the internet as well as ping the router, it's just the web UI for admin cannot show...

@QAQ, thanks, it is a brand-new router just configured a few days ago, I will try reset/reconfigure when this problem happens again.

Model : Hardware Version : Firmware Version : ISP : Firmware Version: 3.18.0 Build 20160201 Rel.42677n Hardware Version: ArcherC1900 v1 The web UI stops working after a few days of the running, it...