FileCatalyst is famous for its UDP acceleration. TCP is reliable but slow because it checks every packet for errors. UDP is fast because it fires data without waiting for confirmation—great for speed, tricky for firewalls.
However, even the most Ferrari-like file transfer engine can’t perform if the garage door is closed. If you are experiencing connection timeouts, slow speeds, or failed transfers, the culprit is almost always the same: filecatalyst firewall