TITLE

The NAT Traversal Problem

AUTHOR(S)
Passmore, David
PUB. DATE
December 2004
SOURCE
Business Communications Review;Dec2004, Vol. 34 Issue 12, p12
SOURCE TYPE
Trade Publication
DOC. TYPE
Article
ABSTRACT
This article discusses various issues related to standardization of network address translation (NAT). Despite NAT routers and firewalls, the networking industry has been late to recognize that anything should be done to standardize NAT behavior. The problem is that many peer-to-peer applications fail to communicate in the presence of NAT. Millions of NAT routers and firewalls have been deployed on links to the Internet. NAT is used by broadband subscribers, enterprises and service providers. The reason behind such pervasiveness of NAT is that it conserves IP addresses, letting many devices located behind a NAT router share a single public IP address. And with residential broadband, the DSL or cable modem provider only offers a single dynamically assigned IP address, so NAT routers are necessary for households with multiple networked devices. However, the incompatibility between NATs and many peer-to-peer applications can result in unhappy users, frustrated technical support staffs, challenged product developers and lost productivity. As enough people begin to realize that IPv6 won't make the NAT traversal problem go away, perhaps NAT product behavior and traversal techniques can be standardized.
ACCESSION #
15341744

 

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