Yes, that is exactly my point! The guest WLAN should not be able to access the webinterface, whatever password you have set. You probably mean "AP-isolation". Come on guys @ TP-LINK, this router is...

Yes 480 minuts is 8 hours, my bad. Rest of the issues still stands

Region : Netherlands Model : TL-WDR4300 Hardware Version : V1 Firmware Version : 3.13.33 Build 130617 Rel.46239n ISP : Just setting up this nicely priced router with bandwidth limited guest WLAN...