Fix The Unexpected Linksys Error 2123 Use these techniques to resolve the unexpected [Linksys error 2123](https://linksyswifiextender.net/resolve-2123-error/). Before doing anything else, ensure your Linksys router is turned on and connected to the internet. After that, try resetting the router by disconnecting it, waiting 10 seconds, and then plugging it back in. If the problem still occurs, see if your network model has any accessible firmware upgrades. Download the most recent firmware for your particular router model from the Linksys website. To upgrade the firmware, follow Linksys instructions. Perform the router's factory default reset as well. Locate the reset button on your router (usually found on the back or bottom) and press and hold it for about 10 seconds until the lights on the router blink. Finally, after the router reboots, reconfigure your network settings and check that Linksys error 2123 is resolved. If the issue persists, it is advisable to contact Linksys support for further assistance.