EXHIBIT 5.1
                                PIPER & MARBURY
                                    L.L.P.
                         1200 NINETEENTH STREET, N.W.
                          WASHINGTON, D.C. 20036-2430
                                 202-861-3900
                               FAX: 202-223-2085


                               February 26, 1999

AXENT Technologies, Inc.
2400 Research Boulevard, Suite 200
Rockville, Maryland  20850

     Re:  Registration Statement on Form S-8
          ----------------------------------

Ladies and Gentlemen:

     We have examined the Registration Statement on Form S-8 to be filed by you
with the Securities and Exchange Commission on or about February 26, 1999 (the
"Registration Statement"), in connection with the registration under the
Securities Act of 1933, as amended, of 46,806 shares of Common Stock reserved
for issuance under the Internet Tools 1997 Equity Incentive Plan (the "Plan").
As your legal counsel, we have examined the proceedings proposed to be taken by
you in connection with the sale and issuance of said shares.

     It is our opinion that, upon completion of the proceedings to be taken
prior to issuance of the shares pursuant to the Prospectus constituting part of
the Registration Statement on Form s-8 and upon completion of the proceedings
being taken in order to permit such transactions to be carried out in accordance
with the securities laws of the various states where required, the shares, when
issued and sold in the manner referred to in the Plan and the agreements which
accompany the Plan, and in accordance with the Company's Amended and Restated
Certificate of Incorporation, will be legally and validly issued, fully paid and
nonassessable.

     We consent to the use of this opinion as an exhibit to said Registration
Statement and further consent to the use of our name wherever appearing in said
Registration Statement and amendments thereto.

                                    Very truly yours,

                                    /s/ Piper & Marbury L.L.P.