Logitech MX Master Frequently Asked Questions Manual page 21

UDP 59867,59868
o Check the port is allowed: Press Win + R to open Run
o Type wf.msc and click OK. This should open "Windows Defender Firewall with Advanced
Security" window.
o Go to Inbound Rules and make sure LogiOptionsMgr.Exe is there and is allowed
Example:
5. If you don't see the entry, it could be that one of your antivirus/firewall applications are blocking
the rule creation, or you were initially denied access. Try the following:
1. Disable the antivirus/firewall application temporarily.
2. Recreate the firewall inbound rule by:

Uninstalling Logitech Options

Reboot your computer

Make sure the antivirus/firewall app is still disabled

Install Logitech Options again

Re-enable your antivirus
Compatible Antivirus Programs
Antivirus Program
Norton
McAfee
AVG
Kaspersky
Eset
Avast
ZoneAlarm
Flow discovery & Flow
OK
OK
OK
OK
OK
OK
Not Compatible