ZyXEL ZyWALL 5 User Guide - Page 364

Chapter 19 IPSec VPN Table 101 SECURITY > VPN > VPN Rules (IKE) > Edit Gateway Policy (continued) LABEL DESCRIPTION Fall back to Primary Remote Gateway when possible Select this to have the ZyWALL change back to using the primary remote gateway if the connection becomes available again. Fall Back Check Interval* Set how often the ZyWALL should check the connection to the primary remote gateway while connected to the redundant remote gateway. Each gateway policy uses one or more network policies. If the fall back check interval is shorter than a network policy's SA life time, the fall back check interval is used as the check interval and network policy SA life time. If the fall back check interval is longer than a network policy's SA life time, the SA lifetime is used as the check interval and network policy SA life time. Authentication Key Pre-Shared Key Select the Pre-Shared Key radio button and type your pre-shared key in this field. A pre-shared key identifies a communicating party during a phase 1 IKE negotiation. It is called "pre-shared" because you have to share it with another party before you can communicate with them over a secure connection. Type from 8 to 31 case-sensitive ASCII characters or from 16 to 62 hexadecimal ("0-9", "A-F") characters. You must precede a hexadecimal key with a "0x (zero x), which is not counted as part of the 16 to 62 character range for the key. For example, in "0x0123456789ABCDEF", 0x denotes that the key is hexadecimal and 0123456789ABCDEF is the key itself. Both ends of the VPN tunnel must use the same pre-shared key. You will receive a PYLD_MALFORMED (payload malformed) packet if the same pre-shared key is not used on both ends. Certificate Select the Certificate radio button to identify the ZyWALL by a certificate. Use the drop-down list box to select the certificate to use for this VPN tunnel. You must have certificates already configured in the My Certificates screen. Click My Certificates to go to the My Certificates screen where you can view the ZyWALL's list of certificates. Local ID Type Select IP to identify this ZyWALL by its IP address. Select DNS to identify this ZyWALL by a domain name. Select E-mail to identify this ZyWALL by an e-mail address. You do not configure the local ID type and content when you set Authentication Key to Certificate. The ZyWALL takes them from the certificate you select. Content When you select IP in the Local ID Type field, type the IP address of your computer in the local Content field. The ZyWALL automatically uses the IP address in the My ZyWALL field (refer to the My ZyWALL field description) if you configure the local Content field to 0.0.0.0 or leave it blank. It is recommended that you type an IP address other than 0.0.0.0 in the local Content field or use the DNS or E-mail ID type in the following situations. 1. When there is a NAT router between the two IPSec routers. 2. When you want the remote IPSec router to be able to distinguish between VPN connection requests that come in from IPSec routers with dynamic WAN IP addresses. When you select DNS or E-mail in the Local ID Type field, type a domain name or e-mail address by which to identify this ZyWALL in the local Content field. Use up to 31 ASCII characters including spaces, although trailing spaces are truncated. The domain name or e-mail address is for identification purposes only and can be any string. 364 ZyWALL 5/35/70 Series User's Guide