ZyXEL Communications LTE6100, User Manual

Page: 76 / 189

Chapter 10 Firewall
LTE6100 User’s Guide
76
Each field is described in the following table.
10.6 Firewall Technical Reference
This section provides some technical background information about the topics covered in this
chapter.
10.6.1 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.
3
Limit who can access your LTE 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.
10.6.2 Security Considerations
Note: Incorrectly configuring the firewall may block valid access or introduce security
risks to the LTE 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:
1
Does this rule stop LAN users from accessing critical resources on the Internet? For example, if IRC
is blocked, are there users that require this service?
2
Is it possible to modify the rule to be more specific? For example, if IRC is blocked for all users, will
a rule that blocks just certain users be more effective?
Table 32
Security > Firewall > DoS
LABEL DESCRIPTION
DoS Protection
Blocking DoS (Denial of Service) attacks can flood your Internet connection with invalid packets
and connection requests, using so much bandwidth and so many resources that Internet
access becomes unavailable.
Select Enable to enable protection against DoS attacks or Disable to disable it.
Apply Click Apply to save the DoS Protection settings.
Cancel Click Cancel to restore your previously saved settings.