For me, both of those URL's and LAN IP direct me to my router GUI. What loads for you? Have you tried a different browser?

freemansteve wrote Yes I prefer it too. My router is worked pretty hard - 3x PC, Ipod, Phone, Smart TV, NAS box, and 2x kindles connected in some combination 24x7! 2.4G, 5G and wired ethernet in use....

I hope I do not have the same experience because I like the new GUI.