ZyXEL Communications P660HN-Fx User Manual

Chapter 16 VPN

ADSL Series User’s Guide

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 

 on keeping alive to have the ZyXEL Device 

renegotiate an IPSec SA when the SA lifetime expires, even if there is no traffic.

Security > VPN > Monitor

The following table describes the fields in this screen.

This section provides some technical background information about the topics covered in this 
chapter.

The overall IPSec architecture is shown as follows.

Security > VPN > Monitor

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).