I went to the symantec site and used their Security Scan program to scan my network to see if it was safe. The program results said my port 1723 is open and could be used for an attack. Now I need this port open so I can VPN into my server. I am using a Linksys router BEFSR41 to forward the port to my VPN server. How can I stealth or hide this port and still be able to use it?