Firewall; Fire Wa Ll; Overview; What You Can Do - ZyXEL Communications NBG-418N v2 User Manual

13.1 O ve rvie w
Use these screens to enable and configure the firewall that protects your NBG-418N v2 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
session from the LAN to the WAN (
initiated from the WAN is blocked (
Fig ure 84 Default Firewall Action
13.2 Wha t Yo u C a n Do
• Use the G e ne ra l
Se rvic e s
• Use the
page 118).
1 ). Return traffic for this session is also allowed (
3 4
and ).
screen to enable or disable the NBG-418N v2's firewall
screen to enable or disable ICMP and VPN passthrough features
NBG-418N v2 User's Guide
C
HA PTER
A can initiate an IM (Instant Messaging)
116
1 3

Fire wa ll

2 ). However other traffic
(Section 13.4 on page 117).
(Section 13.5 on