I just misread, my mistake.
You can use uTorrent to open ports with
People might not prefer it, however it could work lol
People have a problem using uTorrent - explained later.
First off, if you want to use it, you need to make sure "uPnP" is enabled on your router (Last I saw, your router has an option to enable it @Demogorgon).
Second, you want to have the program installed.
Now, this is how I used to
get uTorrent to work with my RSPS, I don't think much has changed..
1: Open uTorrent, go into Options > Preferences > Connection
2: Make sure "Randomize port each start" is unticked, and "Enable uPnP port mapping" is enabled, along with "Add Windows Firewall Exception"
3: Run the RSPS.
4: go back into the preferences, and set the port to 43594.
5: Restart your RSPS.
If you get an error saying the port is in use, you need to change uTorrent off 43594, and repeat steps 3-5.
Again: This is what I did like 2-3 ish years ago to handle it, if shit has changed, I'm sorry.
The problem people used to have, was due to either not having uPnP support on their router, or due to them attempting to run the rsps while uTorrent was on the port (See steps 3-5).