VERTICALNET INC, S-8, EX-23.3, 2000-09-18

VERTICALNET INC
S-8, EX-23.3, 2000-09-18
ADVERTISING

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<PAGE>   1
                                  EXHIBIT 23.3

                         CONSENT OF INDEPENDENT AUDITORS


As independent public accountants, we hereby consent to the incorporation by
reference in this registration statement of our report on the financial
statements of Tradeum Inc. dated March 10, 2000, included in VerticalNet, Inc.'s
current report on From 8-K/A dated March 23, 2000 and to all references to our
Firm included in this registration statement.

                                                /s/ KOST FORER & GABBAY
                                        A member of Ernst & Young International


Tel Aviv, Israel
September 18, 2000