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Windows Firewall: Allow inbound file and printer sharing exception

Allows inbound file and printer sharing. To do this Windows Firewall opens UDP ports 137 and 138 and TCP ports 139 and 445. If you enable this policy setting Windows Firewall opens these ports so that this computer can receive print jobs and requests for access to shared files. You must specify the IP addresses or subnets from which these incoming messages are allowed. In the Windows Firewall component of Control Panel the “File and Printer Sharing” check box is selected and administrators cannot clear it. If you disable this policy setting Windows Firewall blocks these ports which prevents this computer from sharing files and printers. If an administrator attempts to open any of these ports by adding them to a local port exceptions list Windows Firewall does not open the port. In the Windows Firewall component of Control Panel the “File and Printer Sharing” check box is cleared and administrators cannot select it. If you do not configure this policy setting Windows Firewall does not open these ports. Therefore the computer cannot share files or printers unless an administrator uses other policy settings to open the required ports. In the Windows Firewall component of Control Panel the “File and Printer Sharing” check box is cleared. Administrators can change this check box. Note: If any policy setting opens TCP port 445 Windows Firewall allows inbound ICMP echo requests (the message sent by the Ping utility) even if the “Windows Firewall: Allow ICMP exceptions” policy setting would block them. Policy settings that can open TCP port 445 include “Windows Firewall: Allow inbound file and printer sharing exception” “Windows Firewall: Allow inbound remote administration exception” and “Windows Firewall: Define inbound port exceptions. “


Additional Information

  1. Registry path is:

    HKEY_LOCAL_MACHINE -> SOFTWARE -> Policies -> Microsoft -> WindowsFirewall -> StandardProfile -> Services -> FileAndPrint # Enabled; HKEY_LOCAL_MACHINE -> SOFTWARE -> Policies -> Microsoft -> WindowsFirewall -> StandardProfile -> Services -> FileAndPrint # RemoteAddresses

  2. The Administrative Template path is:

    Network -> Network Connections -> Windows Firewall -> Standard Profile

Notes

* Making mistakes while changing registry values can affect your system adversely. We recommend you to create a System Restore point before making registry manipulation. If you're new to Registry Editor, read this beginner's guide.
** To locate the registry and administrative template path, checkout beginner's guide.
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