Chapter 43 System
ZyWALL/USG Series User’s Guide
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43.7 WWW Overview
The following figure shows secure and insecure management of the ZyWALL/USG coming in from
the WAN. HTTPS and SSH access are secure. HTTP and Telnet access are not secure.
Note: To allow the ZyWALL/USG to be accessed from a specified computer using a
service, make sure you do not have a service control rule or to-ZyWALL/USG
security policy rule to block that traffic.
To stop a service from accessing the ZyWALL/USG, clear Enable in the corresponding service
screen.
43.7.1 Service Access Limitations
A service cannot be used to access the ZyWALL/USG 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/USG 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 security policy rule that blocks it.
43.7.2 System Timeout
There is a lease timeout for administrators. The ZyWALL/USG 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/USG for authentication again when the
reauthentication time expires.
You can change the timeout settings in the User/Group screens.
Action Select Accept to have the ZyWALL/USG allow the DNS queries from the specified
computer.
Select Deny to have the ZyWALL/USG reject the DNS queries from the specified computer.
OK Click OK to save your customized settings and exit this screen.
Cancel Click Cancel to exit this screen without saving
Table 355 Configuration > System > DNS > Service Control Rule Add (continued)
LABEL DESCRIPTION
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