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Chapter 23 IPSec VPN
ZyWALL USG 50 User’s Guide
402
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 Table 117 on page 402, the ZyWALL and the remote IPSec router
authenticate each other successfully. In contrast, in Table 118 on page 402, the
ZyWALL and the remote IPSec router cannot authenticate each other and,
therefore, cannot establish an IKE SA.
It is also possible to configure the ZyWALL to ignore the identity of the remote
IPSec router. In this case, you usually set the peer ID type to Any. This is less
secure, so you should only use this if your ZyWALL provides another way to check
Table 117 VPN Example: Matching ID Type and Content
ZYWALL REMOTE IPSEC ROUTER
Local ID type: E-mail Local ID type: IP
Local ID content: tom@yourcompany.com Local ID content: 1.1.1.2
Peer ID type: IP Peer ID type: E-mail
Peer ID content: 1.1.1.2 Peer ID content: tom@yourcompany.com
Table 118 VPN Example: Mismatching ID Type and Content
ZYWALL REMOTE IPSEC ROUTER
Local ID type: E-mail Local ID type: IP
Local ID content: tom@yourcompany.com Local ID content: 1.1.1.2
Peer ID type: IP Peer ID type: E-mail
Peer ID content: 1.1.1.20 Peer ID content: tom@yourcompany.com
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