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Chapter 14 Firewall
P-2612HNU-Fx User’s Guide
206
14.3 Firewall Technical Reference
This section provides some technical background information about the topics
covered in this chapter.
14.3.1 Firewall Rules Overview
Your customized rules take precedence and override the ZyXEL Device’s default
settings. The ZyXEL Device checks the source IP address, destination IP address
and IP protocol type of network traffic against the firewall rules (in the order you
list them). When the traffic matches a rule, the ZyXEL Device takes the action
specified in the rule.
14.3.2 Guidelines For Enhancing Security With Your Firewall
1 Change the default password via web configurator.
2 Think about access control before you connect to the network in any way.
3 Limit who can access your ZyXEL Device.
4 Don't enable any local service (such as telnet or FTP) that you don't use. Any
enabled service could present a potential security risk. A determined hacker might
be able to find creative ways to misuse the enabled services to access the firewall
or the network.
5 For local services that are enabled, protect against misuse. Protect by configuring
the services to communicate only with specific peers, and protect by configuring
rules to block packets for the services at specific interfaces.
6 Keep the firewall in a secured (locked) room.
Add Click this to add the selected service in Available Services to the
Blocked Services list. Note that the service is blocked immediately
after clicking this.
Delete
Select a service in the Blocked Services, and click this to remove the
service from the list.
Clear All
Click this to remove all the services in the Blocked Services list.
Apply Click this to enable LAN-to-WAN services blocking.
Reset
Click this to set every field in this screen to its last-saved value.
Table 54 Security > Firewall
LABEL DESCRIPTION