3rt841b Firmware 2021 ⏰

Via TIA Portal:

Via Web Interface:

The 2021 firmware disabled unused ports (UDP 161 for SNMP by default, now configurable) and enforced stricter password complexity for the web interface. It also removed the default “admin” account creation—forcing first-time setup via DIP switch or engineering tool. 3rt841b firmware 2021

Firmware updates are essential for ensuring that devices operate with the latest features, security patches, and performance improvements. For industrial devices like the 3RT841B, updates might also include bug fixes, enhancements in reliability, and compliance with new standards or regulations. Via TIA Portal: