Access Control; Chapter 13 Access Control; Access Control Introduction; Quality Of Service (Qos) - ZyXEL Communications NBG-510S User Manual

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H A P T E R
This chapter gives some background information on firewalls and explains how to get started
with the ZyXEL Device's firewall.

13.1 Access Control Introduction

Access control controls access going from computers on the LAN to the WAN (the Internet).
It also allows you to use QoS to give higher priority to traffic from specific applications (like
voice).
Configuring access control configures the firewall's LAN to WAN settings.
Port forwarding automatically has the firewall allow unencrypted access from the WAN (the
Internet) to your LAN.
• For secure connections from the Internet to the LAN computers, use the secure remote
user portal (see part
• To set which services/protocols can access the ZyXEL Device from the WAN (the
Internet), see
the ZyXEL Device.
• To allow unencrypted sessions in from the WAN to the LAN, use the NAT port
forwarding screen (see

13.2 Quality of Service (QoS)

Quality of Service (QoS) prioritizes traffic by application. This helps guarantee the quality of
high priority traffic like voice. QoS refers to both a network's ability to deliver data with
minimum delay, and the networking methods used to provide bandwidth for real-time
multimedia applications. Here are some recommendations for assigning priorities to different
types of traffic.

Figure 65 Priority Assignment Recommendations

PRIORITY
Highest
High
NBG-510S User's Guide
VI on page 133).
Section 19.4 on page 129. This allows or disallows remote management of
Section 11.3 on page
TYPE OF TRAFFIC TO USE FOR
Voice since it is especially sensitive to jitter (variations in delay).
Video since it consumes high bandwidth and is sensitive to jitter.

Access Control

82).
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