ZyXEL Communications P-320W v3, User Manual

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Chapter 12 Firewall
P-320W v3 User’s Guide
121
12.6 Technical Reference
This section provides some technical information about the topics covered in this
chapter.
12.6.1 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,
including attaching a modem to the port.
3
Limit who can access your router.
4
Don't enable any local service (such as SNMP or NTP) 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
Protect against IP spoofing by making sure the firewall is active.
Keep the firewall in a secured (locked) room.
Delete Select a service from the Blocked Services list and then click Delete to
remove this service from the list.
Clear Click Clear to empty the Blocked Services.
Schedule to Block
Day to Block Select a check box to configure which days of the week (or everyday)
you want the content filtering to be active.
Time of Day to
Block (24-Hour
Format) Select the time of day you want service blocking to take effect.
Configure blocking to take effect all day by selecting the All Day check
box. You can also configure specific times that by entering the start
time in the Start (hr) and Start (min) fields and the end time in the End
(hr) and End (min) fields. Enter times in 24-hour format, for example,
"3:00pm" should be entered as "15:00".
Apply Click Apply to save the settings.
Reset Click Reset to start configuring this screen again.
Table 50 Security > Firewall > Services
LABEL DESCRIPTION