News, Press, & Events

FOR IMMEDIATE RELEASE

F5 Networks to Present at the Deutsche Bank 2008 Technology Conference and the Jefferies 2nd Annual Technology Conference

SEATTLE, September 5, 2008 - F5 Networks, Inc. (NASDAQ: FFIV), the global leader in Application Delivery Networking, today announced that company management will participate in the Deutsche Bank 2008 Technology Conference and the Jefferies 2nd Annual Technology Conference on September 10, 2008.

The Deutsche Bank 2008 Technology Conference will be held at The Palace Hotel in San Francisco, Calif. F5's presentation will begin at 3:05 p.m. PT on Wednesday, September 10. F5 representatives for the conference will include John McAdam, President and Chief Executive Officer, and John Rodriguez, SVP and Chief Accounting Officer.

The Jefferies 2nd Annual Technology Conference will be held at the Mandarin Oriental hotel in New York, N.Y. F5's presentation will begin at 9:30 a.m. ET on Wednesday, September 10. F5 representatives for the conference will include Andy Reinland, SVP and Chief Finance Officer, and Cooper Werner, Director of Finance.

Interested viewers can go to www.f5.com/about/investor-relations/events-calendar.html to access a direct link to the webcasts for both presentations, which will be accessible through October 9, 2008.

About F5 Networks

F5 Networks is the global leader in Application Delivery Networking. F5 provides solutions that make applications secure, fast, and available for everyone. By adding intelligence and manageability into the network to offload applications and optimize the data storage layer, F5 extends the power of intelligent networking to all levels of application delivery. F5's extensible architecture intelligently integrates application optimization, protects the application and the network, and delivers application reliability. Over 16,000 organizations and service providers worldwide trust F5 to keep their applications running. The company is headquartered in Seattle, Washington with offices worldwide. For more information, go to www.f5.com.

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Press Contacts
F5 Investor Relations
John Eldridge
206-272-6871
j.eldridge@f5.com