ElephantPort

ElephantPort is a networking utility capable of opening any ports secured by the computer's firewall. It contains just a couple of options that are intuitive enough to be tackled by all types of users, even those less familiarized with this kind of software. No server configuration is required.

Setup, prerequisites, and interface

The installation operation is speedy and shouldn't give you any trouble, since there are no special settings or third-party offers bundled with the setup it. However, you must have .NET Framework, since it was developed with the aid of this platform.
When it comes to the interface, ElephantPort adopts a small window with a neatly structured layout, where you can create a list with as many different ports as you want to open by just specifying their number.

Open multiple ports and keep them opened

Once the tool establishes the connection, the ports are forwarded and remain opened until further notice. Apart from the fact that you can clear all ports from the list, it's also possible to ask the program to automatically reconnect them on connection failure. The status is shown.
There are no other notable settings available. Unfortunately, the application doesn't implement features for saving the list with all ports to file, in order to load it later and seamlessly open all ports at once without any hassle. On top of that, it doesn't have an option for exporting the list of open ports to file.

Evaluation and conclusion

It worked smoothly in our tests, without triggering the operating system to hang, crash or indicate errors. CPU and RAM consumption was minimal, so it didn't hamper system performance. On the other hand, ElephantPort comes packed with a light set of options, especially for advanced users looking for more control over the opened ports.