Prestige 662H/HW Series User’s Guide
Figure 96 VPN Host using Intranet DNS Server Example
If you do not specify an Intranet DNS server on the remote network, then the VPN host must use IP addresses to access the computers on the remote network.
19.8 ID Type and Content
With aggressive negotiation mode (see the Negotiation Mode section ), the Prestige identifies incoming SAs by ID type and content since this identifying information is not encrypted. This enables the Prestige to distinguish between multiple rules for SAs that connect from remote IPSec routers that have dynamic WAN IP addresses. Telecommuters can use separate passwords to simultaneously connect to the Prestige from IPSec routers with dynamic IP addresses (see the Telecommuter VPN/IPSec Examples section for a telecommuter configuration example).
Regardless of the ID type and content configuration, the Prestige does not allow you to save multiple active rules with overlapping local and remote IP addresses.
With main mode (see the Negotiation Mode section ), the ID type and content are encrypted to provide identity protection. In this case the Prestige can only distinguish between up to 12 different incoming SAs that connect from remote IPSec routers that have dynamic WAN IP addresses. The Prestige 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 the Configuring Advanced IKE Settings section ). 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
Chapter 19 VPN Screens | 224 |