A10 Networks Files Patent Countersuits Against F5 Networks

SAN JOSE, CA, December 15, 2010 - A10 Networks™("A10"), the technology leader in Application Delivery Controllers (ADCs), today announced that the company had sued F5 Networks Inc. ("F5") for infringing one of its patents. A10's allegations were made in its counterclaims in the lawsuit F5 filed against A10. F5 asserted claims of patent infringement and trade-secret misappropriation. A10 has fully denied those allegations because (i) the accused A10 AX Series network devices are not covered by the asserted F5 patents, (ii) neither A10 nor its employees have misappropriated any enforceable trade secrets, (iii) all the F5 patents are unenforceable due to F5's failure to submit material prior art to the U.S. Patent & Trademark Office during prosecution of the F5 patents, and (iv) all the F5 patents are invalid over the prior art. Moreover, A10 has filed reexamination requests with the U.S. Patent & Trademark Office to declare that all claims in the F5 patents, as asserted against A10, are invalid.

About A10 Networks
A10 Networks was founded in Q4 2004 with a mission to provide innovative networking and security solutions. A10 Networks makes high-performance products that help organizations accelerate, optimize and secure their applications. A10 Networks is headquartered in Silicon Valley with offices in the United States, United Kingdom, France, The Netherlands, Germany, Brazil, Japan, China, Korea and Taiwan. For more information, visit www.a10networks.com

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Contact:
Please contact A10's outside general legal counsel, Robert D. Cochran, Esq., at 650-298-9901 ext 188 with any questions.