WatchGuard Technologies WatchGuard Firebox SOHO 6 - Manual (Page 105)

User Guide 87
Frequently Asked Questions
Special Considerations
Consider the following before configuring your WatchGuard
SOHO 6 VPN network:
• You can connect up to six SOHO 6 appliances together. To set
up more VPN tunnels, you need at least one WatchGuard
Firebox II/III configured with the WatchGuard VPN
Manager.
• Each appliance must be able to send messages to the other. If
either appliance has a dynamically assigned IP address (see
“Network addressing” on page 31 for an explanation of
dynamic IP addresses), that appliance cannot find its remote
counterpart.
• Both appliances must use the same encryption method. The
two choices are DES or 3DES. When connecting two
Microsoft Windows NT
®
networks, the two networks must
be in the same Microsoft Windows domain or be trusted
domains. This is a Microsoft Networking design
implementation and not a limitation of the SOHO 6.
Frequently Asked Questions
Why do I need a static external address?
To create a VPN connection, one SOHO 6 must be able to find its
partner appliance. If the addresses are allowed to change, the
SOHO 6 will not find its remote computer.
How do I get a static external IP address?
Contact your ISP. Many systems use dynamically assigned
addresses to simplify basic installations. Some providers also use