I have an issue reoccurring. I am using a Linksys E2500 router on Win 10. Lately on my PC some sites work like Facebook and Google, but can't access others. I tried to access router page using the default gateway 192.168.1.1, but it doesn't work. I noticed that on my network adapter has an IPv6 address, but no IPv4. I have to restart the router and modem several times. I had this router for several years, and this issue just started recently. I haven't done any changes to the router. Is the router reaching it's end?