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Exhibit 10.25

        FIRST AMENDMENT, dated as of December 28, 2007 (this "Amendment"), to
the Senior Credit Agreement, dated as of October 11, 2007 (as amended,
supplemented or otherwise modified from time to time, the "Credit Agreement"),
among WEBSENSE, INC., a Delaware corporation (the "Company"), the lenders from
time to time parties thereto (the "Lenders"), MORGAN STANLEY SENIOR
FUNDING, INC., as senior administrative agent (in such capacity, the
"Administrative Agent"), BANK OF AMERICA, N.A., as syndication agent (in such
capacity, the "Syndication Agent"), KEY BANK NATIONAL ASSOCIATION, JP MORGAN
CHASE BANK, N.A. and CITIBANK, N.A., as co-documentation agents (in such
capacity, the "Co-Documentation Agents") and MORGAN STANLEY & CO. INCORPORATED,
as senior collateral agent (in such capacity, and together with its successors
in such capacity, the "Collateral Agent").

        WHEREAS, the Company, the Lenders, the Administrative Agent, the
Syndication Agent, the Co-Document Agents and the Collateral Agent are parties
to the Credit Agreement and have agreed to amend the Credit Agreement in the
manner and subject to certain limitations and conditions as provided for herein.

        NOW, THEREFORE, in consideration of the premises contained herein, the
parties hereto agree as follows:

        1.     Defined Terms.    Unless otherwise defined herein, terms which
are defined in the Credit Agreement and used herein as defined terms are so used
as so defined.

        2.     Amendments to the Credit Agreement.

        (a)   Section 2.3 of the Credit Agreement is hereby amended by deleting
the phrase "aggregate principal amount of the then outstanding Term Loans" set
forth therein and replacing it with the phrase "aggregate initial principal
amount of the Term Loans".

        (b)   Section 4.2(c) of the Credit Agreement is hereby amended by
deleting the date "December 31, 2007" set forth therein and replacing it with
the date "December 31, 2008".

        3.     Consent.    The Borrower has notified the Administrative Agent
that it intends to make a voluntarily prepayment of the Term Loans in an amount
equal to $20,000,000 on or before December 31, 2007 (the "2007 Prepayment").
Each of the Lenders hereby agrees that, notwithstanding anything to the contrary
set forth in Section 4.8 of the Credit Agreement, the 2007 Prepayment shall be
applied to reduce the remaining installments of the Term Loan in direct order of
maturity.

        4.     Representations and Warranties.    On and as of the date hereof,
the Company hereby represents and warrants that as of the date hereof, (i) after
giving effect to the terms hereof, there exists no Default or Event of Default
under the Credit Agreement or any of the Loan Documents, (ii) the Company has
the power and is duly authorized to enter into, deliver and perform this
Amendment, and (iii) this Amendment is the legal, valid and binding obligation
of the Company enforceable against the Company in accordance with its terms.

        5.     Conditions to Effectiveness.    Sections 2 and 3 of this
Amendment shall become effective upon satisfaction of the following conditions:
(a) the Administrative Agent shall have received counterparts of this Amendment
duly executed by the Company, each of the Required Lenders (in the case of
Sections 2 and 3) and each of the Term Lenders (in the case of Sections 2(b) and
3) and (b) all of the representations and warranties made in this Amendment
shall be true and correct.

        6.     Continuing Effect; No Other Amendment or Consents.    Except as
expressly provided herein, all of the terms and provisions of the Credit
Agreement and each of the Loan Documents are and shall remain in full force and
effect. The amendments provided for herein are limited to the specific sections
of the Credit Agreement and each of the Loan Documents specified herein and
shall not constitute a consent, waiver or amendment of, or an indication of the
Administrative Agent's or the Lenders' willingness to consent to any action
requiring consent under any other provisions of the Credit Agreement or any of
the Loan Documents or the same section for any other date or time period. The

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Company acknowledges and agrees that this Amendment shall be deemed a Loan
Document for all purposes under the Credit Agreement.

        7.     Counterparts.    This Amendment may be executed in any number of
counterparts by the parties hereto (including by facsimile transmission), each
of which counterparts when so executed shall be an original, but all the
counterparts shall together constitute one and the same instrument.

        8.     GOVERNING LAW.    THIS AMENDMENT SHALL BE GOVERNED BY, AND
CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

2

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        IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed and delivered by their respective duly authorized officers as of the
date first above written.

 
 
WEBSENSE, INC.
 
 
By:
 
  

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    Name:
Title:
 
 
MORGAN STANLEY SENIOR FUNDING, INC.,
as Administrative Agent and as a Lender
 
 
By:
 
  

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    Name:
Title:
 
 
MORGAN STANLEY & CO. INCORPORATED,
as Collateral Agent
 
 
By:
 

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    Name:
Title:
 
 
BANK OF AMERICA, N.A.,
as Syndication Agent and as a Lender
 
 
By:
 
  

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    Name:
Title:
 
 
KEY BANK NATIONAL ASSOCIATION,
as Co-Documentation Agent and as a Lender
 
 
By:
 
  

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    Name:
Title:

3

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J.P. MORGAN CHASE BANK, N.A.,
as Co-Documentation Agent and as a Lender
 
 
By:
 
  

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    Name:
Title:
 
 
CITIBANK, N.A.,
as Co-Documentation Agent and as a Lender
 
 
By:
 
  

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    Name:
Title:

4

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LENDERS
 
 
  

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as a Lender
 
 
By:
 
  

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    Name:
Title:

5

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Exhibit 10.25