This is how I will define mineġ39 marks port I want to open, TCP means that port goes through TCP traffic, localsubnet (will be allowed), enable – rule will be enabled and SMBforDesktop… is a description of the rule. In shown screen we will define our exceptions. We need to navigate to Computer Configuration | Policies | Administrative Templates | Network | Network Connections | Windows Defender Profile | Domain Profile (depends to which profile your user PCs are connected to) | Select Windows Defender Firewall: Define inbound port exceptionsĪfter Windows Defender Firewall: Define inbound port exceptions rule opens – select Enabled, read through Options and Help screen and then click on Show… I will name New GPO Firewall and click OK Select – Create GPO in this domain, and Link it here… On domain controller open Group Policy Management and right click on UserPCs (you will click on OU you wish to apply this rule to). I will open new firewall ports for these two PCs via GPO. In my domain I have OU named UserPCs – inside that OU are two computers that belong to my users inside domain – Client1 and Client2.
How to open port in windows firewall via GPO Instead of going from PC to PC and doing it manually, it can be done via domain group policy.
Situation is simple – I have a domain informatiker.local with domain controller, and I wish to open ports 135, 139 and 445 on all my desktop machines inside domain.
Current work on Desktop Management software made me do this quick guide on how to open some ports for all computers in your domain via GPO.
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