The Peer Name Resolution Protocol requires the following firewall exceptions:
- UDP 3540 (Peer Name Resolution-Protocol (PNRP))
- UDP 1900 (Simple Service Discovery-Protocol (SSDP))
For Internet synchronization you will additionally need the Tunnel protocol Teredo. This will have to be allowed by the firewall, unless your network natively supports IPv6.
How to configure the Windows® Firewall manually for the use of the Peer Name Resolution-Protocol
Windows XP
- Open the Control Panel over “Start > Control Panel“
- Click on “Network and Internet Connectivity“
- Click on “Change Windows Firewall settings“
- Activate the Windows Firewall
- Make sure that the check box “Don`t allow exceptions“ is not checked
- Activate the check box “Peer Name Resolution-Protocol (PNRP)“ and “UPnP-Framework“ under “Exceptions“
If the entry “Peer Name Resolution-Protocol (PNRP)“ is not available, then click on “Port…“ and enter the following data:
- Click “OK“ to confirm changes
Windows Vista
SimpleSYN registers the firewall rules necessary for the Peer Name Resolution-Protocol in the Windows Firewall during installation, and activates them in private network profiles. The altered firewall rules are not automatically activated in any of the other network profiles for security reasons.
Proceed as follows to activate the firewall rules for the Peer Name Resolution-Protocol under Windows® Vista:
- Open the Control Panel over “Start > Control Panel“
- Click on “Security“
- Click on “Windows Firewall“
- Click on “Change Settings“
- Make sure that the Windows Firewall is activated
- Deactivate the check box “Don`t allow exceptions“
- Click on “Exceptions“
- Search for the entry “SimpleSYN (PNRP)“ and activate the check box
- Confirm the settings by clicking “OK“
Windows 7
SimpleSYN registers the firewall rules necessary for the Peer Name Resolution-Protocol in the Windows Firewall during installation, and activates them in private network profiles. The altered firewall rules are not automatically activated in any of the other network profiles for security reasons.
Proceed as follows to activate the firewall rules for the Peer Name Resolution-Protocol under Windows® 7
- Open the Control Panel over “Start > Control Panel“
- Click on “System and Security“
- Click on “Windows Firewall“
- Make sure that the Windows Firewall is activated in the active network
- Click left on “Advanced Settings“
- Click on “Inbound Rules“
- Search for entries with “SimpleSYN (PNRP)“ as a group name and the required network profile in the column “Profile“
- Activate the required firewall rules. To do so click right on “Enable Rule“
- To ensure a smooth operation make sure that the firewall rules are activated for the group “Core Network“
Third Party Desktop Firewalls
If you use a personal Firewall form a Third Party manufacturer, then please check the following points:
- Under Windows® Vista and Windows® 7 the installed personal firewall software must support the Internet protocol Version 6 (IPv6) correctly. Otherwise Windows will deactivate the use of the Tunnel protocol Teredo and the Internet synchronization might not be possible. Please make sure that your firewall software does indeed support Teredo. For further information contact the firewall software manufacturer.
- Make sure that the service “PNRPSvc“ (Peer Name Resolution-Protocol) with the "UDP Port 3540" is allowed by the firewall
- Make sure that the service “SSDPSrv“ (Simple Service Discovery-Protocol) with "UDP Port 1900" is allowed by the firewall