Exhibit 3.1

AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

OF

SOURCEFIRE, INC.

ARTICLE I

The name of the corporation is Sourcefire, Inc.

ARTICLE II

The address of the registered office of the corporation in the State of Delaware is 2711 Centerville Road, Suite 400, City of Wilmington, County of New Castle, l9808. The name of its registered agent at that address is Corporation Service Company.

ARTICLE III

The purpose of the corporation is to engage in any lawful act or activity for which corporations may be organized under the General Corporation Law of the State of Delaware.

ARTICLE IV

The total number of shares of stock which the corporation has authority to issue is One Thousand (1,000) shares, all of which shall be Common Stock, $0.001 par value per share.

ARTICLE V

The Board of Directors of the corporation shall have the power to adopt, amend or repeal Bylaws of the corporation.

ARTICLE VI

Election of directors need not be by written ballot unless the Bylaws of the corporation shall so provide.

ARTICLE VII

To the fullest extent permitted by law, no director of the corporation shall be personally liable for monetary damages for breach of fiduciary duty as a director. Without limiting the effect of the preceding sentence, if the Delaware General Corporation Law is hereafter amended to authorize the further elimination or limitation of the liability of a director, then the liability of a director of the corporation shall be eliminated or limited to the fullest extent permitted by the Delaware General Corporation Law, as so amended.

The corporation may indemnify to the fullest extent permitted by law any person made or threatened to be made a party to an action or proceeding, whether criminal, civil, administrative or investigative, by reason of the fact that he or she or his or her testator or intestate is or was a director, officer or employee of the corporation or any predecessor of the corporation or serves or served any other enterprise as a director, officer or employee at the request of the corporation or any predecessor to the corporation.

Neither any amendment nor repeal of this Article VII, nor the adoption of any provision of this Certificate of Incorporation inconsistent with this Article VII, shall eliminate, reduce or otherwise adversely affect any limitation on the personal liability of a director of the corporation existing at the time of such amendment, repeal or adoption of such an inconsistent provision.

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