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                                                                    EXHIBIT 23.1


                        CONSENT OF INDEPENDENT AUDITORS


         We consent to the reference to our firm in the Registration Statement
         pertaining to the 1999 Network Ice Stock Option Plan and the Restated
         1995 Stock Incentive Plan of Internet Security Systems, Inc. and to
         the incorporation by reference therein of our report dated
         January 22, 2001, with respect to the consolidated financial statements
         and schedule of Internet Security Systems, Inc. (formerly ISS Group
         Inc.) included in its Annual Report (Form 10-K) for the year ended
         December 31, 2000, filed with the Securities and Exchange Commission.

                                           /s/ Ernst & Young LLP

         Atlanta, Georgia
         June 4, 2001