Major firmware updates often wipe custom configurations. If your old password does not work, try logging in using the default factory credentials (usually admin for both the username and password) found on the sticker underneath the router. To help tailor this guide, let me know:
When you first purchased your IB-WRB300N router, it came with a "Resource CD." This CD typically contains not only the easy setup wizard but also the original firmware and sometimes updated versions. Ib-wrb300n-1.0.6 Firmware Download -UPD-
After the router reboots:
: Plug an Ethernet cable from your PC into a LAN port on the router. Major firmware updates often wipe custom configurations
If the update fails or the router does not behave correctly, try the following: Ib-wrb300n-1.0.6 Firmware Download -UPD-
Ib-wrb300n-1.0.6 Firmware Download: How to Update Your Router Safely