Barracuda Networks (CUDA) 10-Q 2017 Q3 Quarterly report

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

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

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

I, William D. Jenkins, Jr., certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report on Form 10-Q of Barracuda Networks, Inc. for the fiscal quarter ended November 30, 2016, 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 Quarterly Report on Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of Barracuda Networks, Inc.

Date: January 9, 2017	By:	/s/ William D. Jenkins, Jr.
		William D. Jenkins, Jr.
		Chief Executive Officer
		(Principal Executive Officer)