You could have downloaded Smart Port Forwarding 1.0.0.1 from our software library for free. The actual developer of the free program is 12oClocker. The software belongs to Internet & Network Tools.
From the developer:
Using the "Capture First Data Packet to SPF.log file" Option makes the task of creating rules Easy!
Since you will be able to actually dump the first data packet of the program you are forwarding to a log file, which is located in the programs directory (C:\Program Files\Smart Port Forwarding\SPF.log)
You may want to check out more software, such as Lorex Auto Port Forwarding, Simple Port Forwarding or WHS Port Forward, which might be similar to Smart Port Forwarding.
Network tools
Device Assistants