ZyXEL ZyWALL ATP700 User Guide - Page 430
Authentication, Encryption, Tunnel, Transport
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Chapter 19 IPSec VPN Table 164 Configuration > VPN > IPSec VPN > VPN Connection > Add/Edit (continued) LABEL DESCRIPTION First DNS Server (optional) Second DNS Server (Optional) First WINS Server (Optional) Second WINS Server (Optional) Phase 2 Settings SA Life Time Active Protocol The Domain Name System (DNS) maps a domain name to an IP address and vice versa. The Zyxel Device uses these (in the order you specify here) to resolve domain names for VPN. Enter a DNS server's IP address. Enter a secondary DNS server's IP address that is checked if the first one is unavailable. Type the IP address of the WINS (Windows Internet Naming Service) server that you want to send to the DHCP clients. The WINS server keeps a mapping table of the computer names on your network and the IP addresses that they are currently using. Enter a secondary WINS server's IP address that is checked if the first one is unavailable. Type the maximum number of seconds the IPSec SA can last. Shorter life times provide better security. The Zyxel Device automatically negotiates a new IPSec SA before the current one expires, if there are users who are accessing remote resources. Select which protocol you want to use in the IPSec SA. Choices are: AH (RFC 2402) - provides integrity, authentication, sequence integrity (replay resistance), and non-repudiation but not encryption. If you select AH, you must select an Authentication algorithm. ESP (RFC 2406) - provides encryption and the same services offered by AH, but its authentication is weaker. If you select ESP, you must select an Encryption algorithm and Authentication algorithm. Both AH and ESP increase processing requirements and latency (delay). Encapsulation The Zyxel Device and remote IPSec router must use the same active protocol. Select which type of encapsulation the IPSec SA uses. Choices are Tunnel - this mode encrypts the IP header information and the data. Transport - this mode only encrypts the data. Proposal Add Edit Remove # The Zyxel Device and remote IPSec router must use the same encapsulation. Use this section to manage the encryption algorithm and authentication algorithm pairs the Zyxel Device accepts from the remote IPSec router for negotiating the IPSec SA. Click this to create a new entry. Select an entry and click this to be able to modify it. Select an entry and click this to delete it. This field is a sequential value, and it is not associated with a specific proposal. The sequence of proposals should not affect performance significantly. ZyWALL ATP Series User's Guide 430