In checking hits to my router I am seeing someone trying to get to my network using port 4899 which is your registered port. Does this mean that the individual is looking to see if that port is open for hacking purposes? My router is set to deny and of course doesn't answer pings. I may propose your product as a replacement for PCAnywhere. I do not fully understand the issue of having any additional port open for hackers. How can I answer this question to the user?