ZyXEL Communications Unified Security Gateway ZyWALL 300, User Manual

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Chapter 50 System
ZyWALL USG 300 User’s Guide
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• See To-ZyWALL Rules on page 457 for more on To-ZyWALL firewall rules.
• See Section 7.10 on page 160 for an example of configuring service control to
block administrator HTTPS access from all zones except the LAN.
To stop a service from accessing the ZyWALL, clear
Enable
in the corresponding
service screen.
50.7.1 Service Access Limitations
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.
50.7.2 System Timeout
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.
50.7.3 HTTPS
You can set the ZyWALL to use HTTP or HTTPS (HTTPS adds security) for Web
Configurator sessions. Specify which zones allow Web Configurator access and
from which IP address the access can come.
HTTPS (HyperText Transfer Protocol over Secure Socket Layer, or HTTP over SSL)
is a web protocol that encrypts and decrypts web pages. Secure Socket Layer
(SSL) is an application-level protocol that enables secure transactions of data by
ensuring confidentiality (an unauthorized party cannot read the transferred data),
authentication (one party can identify the other party) and data integrity (you
know if data has been changed).