WatchGuard Technologies SOHO ユーザーズマニュアル

User Guide 5.0

What you will need

IP Address Table (example):

Item

Description

Assigned By

External IP

Address

The IP address that identifies the SOHO to the Internet.

ISP

Site A: 207.168.55.2

Site B: 68.130.44.15

External

Subnet Mask

The overlay of bits that determines which part of the IP

address identifies your network. For example, a Class C

address licenses 256 addresses and has a netmask of

255.255.255.0.

ISP

Site A: 255.255.255.0

Site B:

255.255.255.0

Local Network

Address

A private network address used by an organization’s local

network for identifying itself within the network. A local

network address cannot be used as a external IP address.

WatchGuard recommends using an address from one of the

reserved ranges:

10.0.0.0 — 255.0.0.0

172.16.0.0 — 255.240.0.0

192.168.0.0/16 — 255.255.0.0

You

Site A: 255.255.255.0

Site B: 255.255.255.0

Shared Secret A phrase stored at both ends of the tunnel to authenticate

the transmission as being from the claimed origin. The

secret can be any phrase, but mixing numerical, special,

alphabetical, and uppercase characters improves security.

For example, “Gu4c4mo!3” is better than “guacamole”

You

Site A: OurLittleSecret

Site B: OurLittleSecret

Encryption

Method

Encryption method determines the length in bits of the key

used to encrypt and decrypt communication packets. DES is

a 56-bit encryption; 3DES is 168-bit, and therefore much

more secure. It is also slower. Either 3DES or DES may be

selected as long as both sides use the same method.

You

Site A: 3DES

Site B: 3DES

Authentication Both sides must use the same method.

You

Site A: MD5

Site B: MD5