User Manual

Table Of Contents

LTE3301 Series User’s Guide

103

C HAPTER 14

Fire wa ll

14.1 O ve rvie w

Use these screens to enable and configure the firewall that protects your LTE3301 and your LAN from

unwanted or malicious traffic.

Enable the firewall to protect your LAN computers from attacks by hackers on the Internet and control

access between the LAN and WAN. By default the firewall:

• allows traffic that originates from your LAN computers to go to all of the networks.

• blocks traffic that originates on the other networks from going to the LAN.

The following figure illustrates the default firewall action. User A can initiate an IM (Instant Messaging)

session from the LAN to the WAN (1). Return traffic for this session is also allowed (2). However other traffic

initiated from the WAN is blocked (3 and 4).

Fig ure 69 Default Firewall Action

14.1.1 Wha t Yo u C a n Do

• Use the G e ne ra l screen to enable or disable the LTE3301’s firewall (

Section 14.2 on page 104).

• Use the Se rvic e s screen enable service blocking, enter/delete/modify the services you want to block

and the date/time you want to block them (Section 14.3 on page 105).

14.1.2 Wha t Yo u Ne e d To Kno w

The following terms and concepts may help as you read through this chapter.

WAN

LAN