ZyXEL Communications ZYWALL USG 2000 Manual page 370

Chapter 21 IPSec VPN
encryption algorithm and encryption key the ZyWALL and remote IPSec router
selected in previous steps.
Figure 230 IKE SA: Main Negotiation Mode, Steps 5 - 6: Authentication (continued)
You have to create (and distribute) a pre-shared key. The ZyWALL and remote
IPSec router use it in the authentication process, though it is not actually
transmitted or exchanged.
Note: The ZyWALL and the remote IPSec router must use the same pre-shared key.
Router identity consists of ID type and content. The ID type can be domain name,
IP address, or e-mail address, and the content is a (properly-formatted) domain
name, IP address, or e-mail address. The content is only used for identification.
Any domain name or e-mail address that you enter does not have to actually
exist. Similarly, any domain name or IP address that you enter does not have to
correspond to the ZyWALL's or remote IPSec router's properties.
The ZyWALL and the remote IPSec router have their own identities, so both of
them must store two sets of information, one for themselves and one for the other
router. Local ID type and content refers to the ID type and content that applies to
the router itself, and peer ID type and content refers to the ID type and content
that applies to the other router.
Note: The ZyWALL's local and peer ID type and content must match the remote
IPSec router's peer and local ID type and content, respectively.
For example, in
authenticate each other successfully. In contrast, in
370
Step 5:
pre-shared key
ZyWALL identity, consisting of
- ID type
- content
Step 6:
pre-shared key
Remote IPSec router identity, consisting of
- ID type
- content
Table 114 on page 371, the ZyWALL and the remote IPSec router
Table 115 on page 371, the
ZyWALL USG 2000 User's Guide