Zyxel-communications 200 Series Manual de usuario descargar pdf (Pagina 59)

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Chapter 2 Features and Applications

ZyWALL USG 100/200 Series User’s Guide

Application Patrol

Application patrol (App. Patrol) manages instant messenger (IM), peer-to-peer (P2P)

applications like MSN and BitTorrent. You can even control the use of a particular

application’s individual features (like text messaging, voice, video conferencing, and file

transfers). Application patrol has powerful bandwidth management including traffic

prioritization to enhance the performance of delay-sensitive applications like voice and video.

You can also use an option that gives SIP priority over all other traffic. This maximizes SIP

traffic throughput for improved VoIP call sound quality.

2.2 Packet Flow

The following is the key used to describe the packet flow in the ZyWALL.

2.2.1 Interface to Interface (Through ZyWALL)

Ethernet -> VLAN -> Encap -> ALG -> DNAT-> Routing -> FW -> IDP -> AP-> CF -> AV

-> AS -> SNAT -> BWM -> Encap -> VLAN -> Ethernet

Table 4 Packet Flow Key

Ethernet The interface on which the packet is received or sent

VLAN Virtual LAN

Encap The PPPoE or PPTP encapsulation used

ALG Application Layer Gateway

DNAT Destination NAT

Routing Routing includes policy routes, interface routing, static routes and load balancing

for example.

FW Firewall (Through ZyWALL)

zFW Firewall (To ZyWALL)

IDP Intrusion Detection & Protection

ADP Anomaly Detection and Protection

AP Application Patrol

AS Anti-spam

CF Content Filtering

SNAT Source NAT

IPSec D/E VPN Decryption/Encryption

BWM Bandwidth Management

RM Remote Management (System)

AV Anti-Virus

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Zyxel-communications 200 Series Manual de usuario Pagina 59

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