Strengthening the device against network-based intrusions, which is increasingly critical in IIoT (Industrial Internet of Things) environments.
Verify that your physical unit is compatible with the R3.xx branch. Attempting to install R3.53 on a Revision 1 or 2 unit could cause a mismatch. How to Install the R3.53 Update
Some firmware versions reset the admin password to a default (often admin or 1234 ). Check the R3.53 release notes for any changes to default credentials. Final Thoughts