With main mode (see Section 16.12.1 on page 253), the ID type and content are encrypted to provide identity protection. In this case the ZyXEL Device can only distinguish between up to 12 different incoming SAs that connect from remote IPSec routers that have dynamic WAN IP addresses. The ZyXEL Device can distinguish up to 12 incoming SAs because you can select between three encryption algorithms (DES, 3DES and AES), two authentication algorithms (MD5 and SHA1) and two key groups (DH1 and DH2) when you configure a VPN rule (see Section 16.13 on page 254). The ID type and content act as an extra level of identification for incoming SAs.
The type of ID can be a domain name, an IP address or an
Table 90 Local ID Type and Content Fields
LOCAL ID TYPE= | CONTENT= |
|
|
IP | Type the IP address of your computer or leave the field blank to have the ZyXEL |
| Device automatically use its own IP address. |
DNS | Type a domain name (up to 31 characters) by which to identify this ZyXEL Device. |
|
|
Type an | |
| Device. |
| The domain name or |
| identification purposes only and does not need to be a real domain name or |
| address. |
Table 91 Peer ID Type and Content Fields
PEER ID TYPE= | CONTENT= |
|
|
IP | Type the IP address of the computer with which you will make the VPN connection |
| or leave the field blank to have the ZyXEL Device automatically use the address in |
| the Secure Gateway field. |
DNS | Type a domain name (up to 31 characters) by which to identify the remote IPSec |
| router. |
Type an | |
| router. |
| The domain name or |
| identification purposes only and does not need to be a real domain name or |
| address. The domain name also does not have to match the remote router’s IP |
| address or what you configure in the Secure Gateway Addr field below. |
Two IPSec routers must have matching ID type and content configuration in order to set up a VPN tunnel.
246 | Chapter 16 VPN Screens |