ZyXEL Communications LTE6100 User Manual

Chapter 10 Firewall

LTE6100 User’s Guide

Each field is described in the following table.

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

Change the default password via web configurator.

Think about access control before you connect to the network in any way.

Limit who can access your LTE Device.

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.

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.

Keep the firewall in a secured (locked) room.

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:

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?

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?

Security > Firewall > DoS

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.