ZyXEL P-660HNU-F1 User Guide - Page 212
Viewing SA Monitor, 16.6 IPSec VPN Technical Reference, 16.6.1 IPSec Architecture
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Chapter 16 VPN 16.5 Viewing SA Monitor Click Security > VPN > Monitor to open the screen as shown. 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 Section 16.6.6 on page 217 on keeping alive to have the ZyXEL Device renegotiate an IPSec SA when the SA lifetime expires, even if there is no traffic. Figure 109 Security > VPN > Monitor The following table describes the fields in this screen. Table 65 Security > VPN > Monitor LABEL DESCRIPTION No This is the security association index number. Status Displays whether the security association is active or not Tunnel Name This is the name of the new tunnel. IPSec Algorithm This field displays the encryption algorithm, and authentication algorithm used in each VPN tunnel. Disconnect Select one of the security associations, and then click Disconnect to stop that security association. Refresh Click Refresh to display the current active VPN connection(s). 16.6 IPSec VPN Technical Reference This section provides some technical background information about the topics covered in this chapter. 16.6.1 IPSec Architecture The overall IPSec architecture is shown as follows. 212 ADSL Series User's Guide