Exhibit 23.1

      Kost Forer Gabbay & Kasierer 3 Aminadav St. Tel-Aviv 6706703, Israel       Tel: +972-3-6232525 Fax: +972-3-5622555 ey.com

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement on Form S-8  pertaining to the 2016 Compensation Incentive Plan of Allot Communications Ltd., of our report dated March 23, 2017, with respect to the consolidated financial statements and the effectiveness of internal control over financial reporting of Allot Communications Ltd. included in its annual report on Form 20-F for the year ended December 31, 2016, filed with the Securities and Exchange Commission.

	/s/ Kost Forer Gabbay & Kasierer
Tel Aviv, Israel	KOST FORER GABBAY & KASIERER
March 23, 2017	A Member of Ernst & Young Global