 | Copyright © 2008, Juniper Networks, Inc. All rights reserved. Trademark Notice. | |
Network Address Port Translation (NAPT) extends the level of translation beyond that of basic NAT; it modifies both the IP address and the transport identifier (for example, the TCP or UDP port number, or the ICMP query identifier) and places the mapping into the translation table (this entry is called an extended translation). This method can translate the addresses and transport identifiers of many private hosts into a few external addresses and transport identifiers, to make efficient use of globally registered IP addresses.
Similar to basic NAT, for outbound packets NAPT translates the source IP address, source transport identifier, and related checksum fields. For inbound packets NAPT translates the destination IP address, destination transport identifier, and checksum fields.
| Copyright © 2008, Juniper Networks, Inc. All rights reserved. Trademark Notice. | |