Cybercriminals have become so good at finding new ways to penetrate corporate and government IT systems that they can no longer be entirely blocked. Cybersecurity vendors are being forced to recognize that fact, and one of them,Vectra Networks Inc., has raised another $25 million in funding to detect and prioritize attacks in real time so customers can decide which ones to fight first, Venture Capital Dispatch has learned. The Series C round was led by Accel Partners, with Accel Partner Eric Wolford joining the board.