F5 (FFIV) S-8 Registration of securities for employees

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on FormS-8 of F5 Networks, Inc.of our report dated November 15, 2019relating to the financial statements and the effectiveness of internal control over financial reporting which appears in F5 Networks, Inc.’s Annual Report on Form 10-K for the year ended September 30, 2019.

/s/ PricewaterhouseCoopers LLP
Seattle, Washington
May 6, 2020