Firewall Technical Reference; Firewall Rules Overview; Guidelines For Enhancing Security With Your Firewall - ZyXEL Communications P-2612HNU-Fx User Manual

Chapter 14 Firewall
Table 54 Security > Firewall
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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

Change the default password via web configurator.
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Think about access control before you connect to the network in any way.
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Limit who can access your ZyXEL Device.
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Don't enable any local service (such as telnet or FTP) that you don't use. Any
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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.
For local services that are enabled, protect against misuse. Protect by configuring
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the services to communicate only with specific peers, and protect by configuring
rules to block packets for the services at specific interfaces.
Keep the firewall in a secured (locked) room.
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DESCRIPTION
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.
Select a service in the Blocked Services, and click this to remove the
service from the list.
Click this to remove all the services in the Blocked Services list.
Click this to enable LAN-to-WAN services blocking.
Click this to set every field in this screen to its last-saved value.
P-2612HNU-Fx User's Guide