Exhibit 32.2

CERTIFICATION OF CHIEF FINANCIAL OFFER

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Dustin Driggs, certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Annual Report on Form 10-K of Barracuda Networks, Inc. for the fiscal year ended February 28, 2017, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Annual Report on Form 10-K fairly presents, in all material respects, the financial condition and results of operations of Barracuda Networks, Inc.

Date: May 12, 2017

By:	/s/ Dustin Driggs
	Dustin Driggs
	Chief Financial Officer
	(Principal Financial Officer)