I have a client that has a sonic wall TZ 210 and their WAN is provide by the Building land lord and shared with 4 other buisnesses / store fronts in the same physical building. In the equipment room for the building there are several Comcast high speed connections and all combine into a stone gate firewall.
So my client has a WAN address that is a private IP range from the LAN side of the stone gate. The land lord say his firewall has a allow all from and to my client and a deny all to and from all the other tenants.
My client is worried about the land lord or his IT brother in law sniffing their traffic. Is there any way to encrypt all traffic from the sonic wall WAN of my client so it can't be sniffed on the stone gate?
Will this kill the performance? my client has a windows SBS server and 4 pc's and a POS system for their store.
Ideas?