In the Firmware Upgrade page is a toggle for "Security Upgrade".
It says:
Can this be enabled with merlin WRT or could this cause the firmware to try and update with the original ASUS firmware?
It says:
Security upgrade incorporates security measures that continuously update its security file and scans to protect against malware, malicious scripts, and emerging threats in order to secure the router and ensure system stability. Some upgrades addressing important security issues or meeting legal/regulatory requirements will still be downloaded and installed automatically, even if “Security Upgrade” is turned off.
Can this be enabled with merlin WRT or could this cause the firmware to try and update with the original ASUS firmware?