ZyXEL Communications 200 Series 用户手册

 Chapter 43 System

ZyWALL USG 100/200 Series User’s Guide

Figure 495   Secure and Insecure Service Access From the WAN

• See 

 for related information on these screens.

"

To allow the ZyWALL to be accessed from a specified computer using a 
service, make sure you do not have a service control rule or to-ZyWALL 
firewall rule to block that traffic. 

• See 

 for more on To-ZyWALL firewall rules.

• See 

 for an example of configuring service control to block 

administrator HTTPS access from all zones except LAN1. 

To stop a service from accessing the ZyWALL, clear Enable in the corresponding service 
screen. 

A service cannot be used to access the ZyWALL when:

1 You have disabled that service in the corresponding screen.
2 The allowed IP address (address object) in the Service Control table does not match the 

client IP address (the ZyWALL disallows the session).

3 The IP address (address object) in the Service Control table is not in the allowed zone or 

the action is set to Deny. 

4 There is a firewall rule that blocks it.

There is a lease timeout for administrators. The ZyWALL automatically logs you out if the 
management session remains idle for longer than this timeout period. The management session 
does not time out when a statistics screen is polling. 

Each user is also forced to log in the ZyWALL for authentication again when the 
reauthentication time expires. 

You can change the timeout settings in the User/Group screens.