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Windows Firewall: How to Open a Port on a Remote Computer
 
To create/open a port exception on a remote Windows Firewall, such as the alternate HTTP port using TCP port 8080 (we'll name it "AltHTTP"), do the following:

1. Open RegEdit on the PC to which you're logged on.
    
2. From File > Connect Network Registry, select the computer whose firewall you need to adjust. (You must have administrative rights on the remote computer.)
    
3. Navigate to the following key:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\
   SharedAccess\Parameters\FirewallPolicy\DomainProfile\
   GloballyOpenPorts\List
    
4. Create a new string (REG_SZ) value. Name it 8080:TCP
    
5. Give it the following value: 8080:TCP:*:Enabled:AltHTTP
    
6. Close RegEdit.

 

Note: The asterisk in line 5 indicates that the service will be open to all networks and will not be restricted to a specific subnet.