ZyXEL P-2302R Manuel d'utilisateur télécharger pdf (Page 96)

P-2302R Series User’s Guide

95 Chapter 7 Introduction to VoIP

Figure 31 NAT: Incoming

7.3.2 NAT Types

This section discusses the following NAT types that may be implemented on a router in front

of the Prestige.

• Full Cone

• Restricted Cone

• Port Restricted Cone

• Symmetric

The following table summarizes how these NAT types handle outgoing and incoming packets.

Read the following sections for more details and examples.

The examples in these NAT type sections describe NAT translation between internal (private)

and external (public) IP addresses.

Table 20 NAT Types

FULL CONE

RESTRICTED

CONE

PORT

RESTRICTED

CONE

SYMMETRIC

Incoming

Packets

Any external host

can send packets to

the mapped

external IP address

and port.

Only external hosts

with an IP address

to which the internal

host has already

sent a packet can

send packets to the

mapped external IP

address and port.

Only external hosts

with an IP address

and port to which

the internal host

has already sent a

packet can send

packets to the

mapped external IP

address and port.

A host on the external

network can only send

packets to the specific

mapped external IP

address and port that the

NAT router used in

sending a packet to the

external host’s IP address

and port.

Outgoing

Packets

The NAT router maps the internal IP address and port of all

outgoing packets to a single IP address and port on the

external network.

The NAT router maps the

internal IP address and

port of each outgoing

packet to a different

external IP address and

port for each different

destination IP address

and port.

1 2 ... 91 92 93 94 95 96 97 98 99 100 101 ... 383 384

Commentaires sur ces manuels

Pas de commentaire

ZyXEL P-2302R Manuel d'utilisateur Page 96

Commentaires sur ces manuels

Produits connexes et manuels pour Routeurs ZyXEL P-2302R