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A Better Approach than Carrier-Grade-NAT

Olaf Maennel; Randy Bush; Luca Cittadini; Steven Michael Bellovin

Title:
A Better Approach than Carrier-Grade-NAT
Author(s):
Maennel, Olaf
Bush, Randy
Cittadini, Luca
Bellovin, Steven Michael
Date:
Type:
Technical reports
Department:
Computer Science
Permanent URL:
Series:
Columbia University Computer Science Technical Reports
Part Number:
CUCS-041-08
Publisher:
Department of Computer Science, Columbia University
Publisher Location:
New York
Abstract:
We are facing the exhaustion of newly assignable IPv4 addresses. Unfortunately, IPv6 is not yet deployed widely enough to fully replace IPv4, and it is unrealistic to expect that this is going to change before we run out of IPv4 addresses. Letting hosts seamlessly communicate in an IPv4-world without assigning a unique globally routable IPv4 address to each of them is a challenging problem, for which many solutions have been proposed. Some prominent ones target towards carrier-grade-NATs (CGN), which we feel is a bad idea. Instead, we propose using specialized NATs at the edge that treat some of the port number bits as part of the address.
Subject(s):
Computer science
Item views:
251
Metadata:
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