ZyXEL Communications ZyWALL5UTM 4.0 User Manual

ZyWALL 5/35/70 Series User’s Guide

Chapter 19 VPN Screens

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Click VPN, then the Global Setting tab to open the VPN Global Setting screen. Use this 
screen to change your ZyWALL’s global settings. 

Figure 157   VPN: Global Setting

The following table describes the labels in this screen. 

IPSec Algorithm

This field displays the security protocols used for an SA.
Both AH and ESP increase ZyWALL processing requirements and 

communications latency (delay).

Refresh

Click Refresh to display the current active VPN connection(s). 

Disconnect

Select a security association index number that you want to disconnect and then 

click Disconnect. 

Table 106   VPN: SA Monitor  (continued)

Table 107   VPN: Global Setting  

Output Idle Timer

When traffic is sent to a remote IPSec router from which no reply is received 

after the specified time period, the ZyWALL checks the VPN connectivity. If 

the remote IPSec router does not reply, the ZyWALL automatically 

disconnects the VPN tunnel. 
Enter the time period (between 30 and 3600 seconds) to wait before the 

ZyWALL checks all of the VPN connections to remote IPSec routers. 
Enter 0 to disable this feature. 

Input Idle Timer

When no traffic is received from a remote IPSec router after the specified 

time period, the ZyWALL checks the VPN connectivity. If the remote IPSec 

router does not reply, the ZyWALL automatically disconnects the VPN tunnel. 
Enter the time period (between 30 and 3600 seconds) to wait before the 

ZyWALL checks all of the VPN connections to remote IPSec routers. 
Enter 0 to disable this feature.