Nominum DNS Protects Over 120 Million Internet Users From New Vulnerability

Five-Week Nominum Push Results in Customers Flawlessly Upgrading
Their DNS
LAS VEGAS--(Business Wire)--
Nominum, the leading provider of network naming and addressing
technologies, announced today that more than 120 million broadband
Internet users are protected against the new DNS vulnerability as
Nominum helped its carrier and Internet Service Provider customers
upgrade their networks with the latest Nominum DNS software.

This success highlights the unique role Nominum and its software
play in protecting the Internet, and resulted from the strong
partnership Nominum has with over 100 carriers worldwide. The new
software adds additional security measures, including UDP Source Port
Randomization, to an already rich set of security measures that have
been designed to protect global broadband subscribers from DNS cache
poisoning and pharming attacks. Click here to see how cache poisoning
attacks work.

"The events of the last five weeks highlight the profound
importance of DNS to the proper functioning of the Internet and the
critical role Nominum plays in protecting it," said Tom Tovar CEO of
Nominum. "Our customers around the world demonstrated an extraordinary
commitment and ability to address this problem quickly and
efficiently. Their confidence in Nominum, built on a long history of
stable and predictable software releases, allowed them to upgrade
rapidly, without disrupting their networks or operations."

Nominum supplies its DNS software to the world's largest networks
that include most major cable operators, DSL broadband carriers and
Internet service providers around the world. The company's DNS
software is used by nearly half the global wired Internet broadband
users. Click here for a partial list of global customers that leverage
Nominum's DNS software.

"Nominum has a strong track record of delivering software that
works the first time," said Jason Livingood, Executive Director of
Internet Systems Engineering for Comcast Cable (NASDAQ:CMCSA)
(NASDAQ:CMCSK). "We were able to upgrade our servers and secure our
High Speed Internet service in advance of the threat without any
disruption to our customers."

Continuing Efforts to Keep the Internet Safe

Nominum built on existing industry-leading security features,
adding UDP Source Port Randomization to provide additional protection
against the vulnerability reported in US-CERT VU#800113. UDP Source
Port Randomization is the industry response to the new DNS
vulnerability. The company leveraged its software's inherent
performance advantage to implement this feature with no degradation in
DNS performance or stability, thereby allowing customers to rapidly
upgrade without disrupting their broadband services or impacting
subscriber experience. Nominum is prepared to deliver an equal level
of protection and performance for service providers that do not
already take advantage of its software.

"Nominum has done its customers and the Internet a great service
by working so closely with me, the carriers and the rest of the DNS
community on this common threat to the Internet and Nominum has
delivered on the trust placed in it by its customers," said Dan
Kaminsky, the security researcher responsible for discovering the DNS
vulnerability. "To know that over a hundred and twenty million users
are safe within such a short time after the vulnerability was
discovered is excellent and Nominum's customers set a great example
for others to follow."

Editors Note: Nominum will continue to track the progress of the
protection upgrade, and will maintain a real-time tally of the number
of Internet subscribers protected. Click here for the current tally.

For more information regarding Nominum's DNS platforms and
background on the company please visit: www.nominum.com.

About Nominum

Nominum's network naming and addressing solutions power the
world's largest always-on networks. Nominum's Vantio is a
carrier-grade caching DNS server offering highly secure, reliable, and
scalable DNS services. It is the industry's highest performance
caching DNS server, proven in carrier networks around the globe.
Optional service delivery modules support the rapid and reliable
deployment of carrier-centric services that leverage DNS. Nominum DNS
allows communication providers to deliver high quality always-on
broadband internet and innovative services to their customers,
including VoIP, push to talk, fixed-mobile convergence, IPTV and
triple-play. For further information, visit www.nominum.com.

Keyword Tags:

DNS, Comcast, Black Hat, cache poisoning, pharming, Internet
security, UDP Source Port Randomization, caching DNS software, DNS
Flaw, Dan Kaminsky

Nominum
Bruce Van Nice, +1-650-381-6308
bruce.vannice@nominum.com
or
Engage PR for Nominum
Neila Matheny, +1-510-748-8200 ext. 215 (Media)
nmatheny@engagepr.com

Copyright Business Wire 2008