POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby makes, constitutes and
appoints each of Joseph M. Boyle and Todd P. Headley, each of them signing
singly, and with full power of substitution, as the undersigned's true and
lawful attorney-in-fact, with full power and authority as hereinafter described,
to:

(1)	prepare, execute in the undersigned's name and on the undersigned's behalf,
and submit to the U.S. Securities and Exchange Commission (the "SEC") a Form ID,
including amendments thereto, and any other documents necessary or appropriate
to obtain codes and passwords enabling the undersigned to make electronic
filings with the SEC of reports required by Section 16(a) of the Securities
Exchange Act of 1934 or any rule or regulation of the SEC;

(2)	prepare, execute, deliver and file for and on behalf of the undersigned, in
the undersigned's capacity as an officer and/or director of Sourcefire, Inc.
(the "Company"), Forms 3, 4, and 5 in accordance with Section 16(a) of the
Securities Exchange Act of 1934 and the rules and regulations thereunder as
amended from time to time (the "Exchange Act");

(3)	do and perform any and all acts for and on behalf of the undersigned which
may be necessary or desirable to complete and execute any such Form 3, 4, or 5,
including any electronic filing thereof, complete and execute any amendment or
amendments thereto, and timely file such form with the SEC and any stock
exchange or similar authority;

(4)	seek or obtain, as the undersigned's representative and on the undersigned's
behalf, information on transactions in the Company's securities from any third
party, including brokers, employee benefit plan administrators and trustees, and
the undersigned hereby authorizes any  such person to release any such
information to the undersigned and approves and ratifies any such release of
information; and

(5)	take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,
in the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and shall
contain such terms and conditions as such attorney-in-fact may approve in such
attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted.  The undersigned acknowledges that the responsibility to file the Forms
3, 4 and 5 are the responsibility of the undersigned, and the foregoing
attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Exchange Act.
The undersigned further acknowledges and agrees that the attorneys-in-fact and
the Company are relying on written and oral information provided by the
undersigned to complete such forms and the undersigned is responsible for
reviewing the completed forms prior to their filing.  The attorneys-in-fact and
the Company are not responsible for any errors or omissions in such filings.
The attorneys-in-fact and the Company are not responsible for determining
whether or not the transactions reported could be matched with any other
transactions for the purpose of determining liability for short-swing profits
under Section 16(b).
This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this ____day of ______, 2007.

/s/  Darryl M. Dunn