Before starting, connect your computer to the router using an rather than Wi-Fi to prevent any connection drops that could "brick" the device. Update Software in iBall Baton iB-WRT300N - HardReset.info
If IB-LAN has stopped supporting the IB-WRB300N, you can install or DD-WRT third-party firmware. This gives you modern features (WPA3, VLANs, mesh support) but requires technical skill. ib-wrb300n firmware download
Have you successfully flashed an IB-WRB300N? Let us know which hardware version and firmware source worked in the comments below. Before starting, connect your computer to the router