EXHIBIT 21 LIST OF SUBSIDIARIES Subsidiary State or other jurisdiction of organization - ---------- ------------------------------------------- Campell Services, Inc. Michigan Firefox Acquisition Corp. Delaware FTP Software Asia, Inc. Massachusetts FTP Software (Asia Pacific) Pte Ltd Singapore FTP Software Canada Ltd. Alberta, Canada FTP Software Export, Inc. Barbados FTP Software Kabushiki Kaisha Japan FTP Software Security Corp., Inc. Massachusetts FTP Software Worldwide, Inc. Massachusetts