WatchGuard Technologies WatchGuard SOHO and SOHO | tc - Manual (Page 60)

Frequently asked questions
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Frequently asked questions
Why do I need a static public address?
To create a VPN connection, one SOHO must be able to find its
partner device. If the addresses were allowed to change, the SOHO
could not find its remote computer.
How do I get a static public IP address?
Contact your ISP. Some systems, like many cable modem systems,
use dynamically assigned addresses to simplify basic installations.
Some providers may also use this feature to discourage users from
creating Web servers. These providers usually offer a static IP
address option.
How do I connect three or four offices together?
To connect more than two offices together, WatchGuard
recommends designating one office the center of a “star” network
configuration and upgrading it to a WatchGuard Firebox. You can
then manage multiple tunnels to SOHOs or other IPSec compliant
devices from the central Firebox.
How do I troubleshoot the connection?
If you can ping the remote SOHO and computers behind it, your
VPN tunnel is up and running. Any remaining problems are
probably caused by the MS Networking or the applications being
used.