If you are on the company VPN and unable to discover F440-F's,
double-click on the 'fixDDURules.bat' after extracting it from the ddu-fix-firewall-rules.zip
or run it from the command line. It allows discovery for the device. 
This is a temporary fix while an IT solution is developed.

**** Run the .bat only AFTER you startup DDU ****

Catalogued in Jira ticket [OCRSRP-521]
https://oatjira.am.omron.net/browse/OCRSRP-521?filter=-1