Firewall; Chapter 13 Firewall; Overview; What You Can Do In This Chapter - ZyXEL Communications P-2601HN(L)-F1 Series User Manual

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H A P T E R

13.1 Overview

Use the ZyXEL Device firewall screens to enable and configure the firewall that
protects your ZyXEL Device and network from attacks by hackers on the Internet
and control access to it. By default the firewall:
• allows traffic that originates from your LAN and WLAN computers to go to all
other networks.
• blocks traffic that originates on other networks from going to the LAN and
WLAN.
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).
Figure 71 Default Firewall Action
LAN
A

13.1.1 What You Can Do in this Chapter

• Use the General screen to enable or disable the ZyXEL Device's firewall
(Section 13.2 on page
• Use the Services screen to configure LAN-to-WAN services blocking on the
ZyXEL Device
P-2601HN(L)-F1 Series User's Guide
1
2
161).
(Section 13.3 on page 161).

Firewall

WAN
3
4
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