ZyXEL Communications 2WE 27.14SA Monitor, VPN, Refresh, SA Monitor, Table 27-9Manual IKE VPN Rule Setup, When there is outbound traffic but no inbound traffic, the SA times out

ZyWALL 2 and ZyWALL 2WE

	Table 27-9 Manual IKE VPN Rule Setup
LABEL	DESCRIPTION
	Select SHA1 or MD5 from the drop-down list box. The ZyWALL's authentication
Authentication	algorithm should be identical to the secure remote gateway. MD5 (Message Digest 5)
	and SHA1 (Secure Hash Algorithm) are hash algorithms used to authenticate the
Algorithm
	source and integrity of packet data. The SHA1 algorithm is generally considered
	stronger than MD5, but is slower. Select SHA-1for maximum security.
	Type a unique authentication key to be used by IPSec if applicable. Enter 16
Authentication Key	characters for MD5 authentication or 20 characters for SHA-1 authentication. Any
	characters may be used, including spaces, but trailing spaces are truncated.

Click Apply to save your changes. Click Reset to begin configuring this screen afresh.

27.14SA Monitor

In the web configurator, click VPN and the SA Monitor tab. Use this screen to display and manage active VPN connections.

A Security Association (SA) is the group of security settings related to a specific VPN tunnel. This screen displays active VPN connections. Use Refresh to display active VPN connections. This screen is read-only. The following table describes the fields in this tab.

When there is outbound traffic but no inbound traffic, the SA times out

automatically after two minutes. A tunnel with no outbound or inbound traffic is "idle" and does not timeout until the SA lifetime period expires. See the section on keep alive to have the ZyWALL renegotiate an IPSec SA when the SA lifetime expires, even if there is no traffic.

27-24 VPN/IPSec Setup