I currently have a VPN tunnel created between a SonicWall TZ170 and a Cisco 2600. Now I am no VPN expert by any means, but I believe what I am proposing won't affect the VPN. I am proposing to change the local LAN subnet of the SonicWall, currently 192.168.5.0 255.255.255.240 to a full Class C to get more available addresses. Now as far as I understand the connectivity of the VPN is only tied to the external Public WAN address. This makes sense. If I change the local LAN subnet of the SonicWall does anyone foresee this crippling the VPN? The only reason I am worried is for the fact that this particular VPN feeds data to one of our high priority sights and I can't have it go down. Any thoughts?