Firewall Technical Reference; Guidelines For Enhancing Security With Your Firewall; Security Considerations - ZyXEL Communications P-661HNU Manual

Table 49 Security > Firewall > Services (continued)
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13.4 Firewall Technical Reference

This section provides some technical background information about the topics
covered in this chapter.

13.4.1 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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13.4.2 Security Considerations

Note: Incorrectly configuring the firewall may block valid access or introduce security
risks to the ZyXEL Device and your protected network. Use caution when
creating or deleting firewall rules and test your rules after you configure them.
Consider these security ramifications before creating a rule:
Does this rule stop LAN users from accessing critical resources on the Internet?
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For example, if IRC is blocked, are there users that require this service?
P-661HNU-Fx User's Guide
DESCRIPTION
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 Apply to save your changes.
Click Cancel to restore your previously saved settings.
Chapter 13 Firewall
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