Asus Internet Security Router Manuel d'utilisateur télécharger pdf (Page 64)

Chapter 9. Configuring Firewall/NAT Settings Internet Security Router User’s Manual

9.2.3 NAPT (Network Address and Port Translation) or PAT (Port Address

Translation)

Also called IP Masquerading, this feature maps many internal hosts to one globally valid Internet address. The

mapping contains a pool of network ports to be used for translation. Every packet is translated with the globally

valid Internet address and the port number is translated with an un-used port from the pool of network ports.

Figure 9.4 shows that all the hosts on the local network gain access to the Internet by mapping to only one

globally valid IP address and different port numbers from a free pool of network ports.

Figure 9.4 NAPT – Map Any Internal PCs to a Single Global IP Address

Figure 9.5 Reverse Static NAT – Map a Global

IP Address to An Internal PC

Figure 9.6 Reverse NAPT – Relayed Incoming

Packets to the Internal Host Base on the

Protocol, Port Number or IP Address

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Asus Internet Security Router Manuel d'utilisateur Page 64