Hi JIM, The client is FTPSync (from Fileware). But I remember you that it works fine with standard port 21 (using FTP application filter), and doesn't work with port 2121. So I think that ISA behovior is not the same with the two ports. Is it possible to use "FTP application filter" on port 2121 ? (port fields are disabled and cannot be modified) THANKS ! -----Message d'origine----- De : Jim Harrison [mailto:jim@xxxxxxxxxxxx] Envoyé : mercredi 29 janvier 2003 21:52 À : [ISAserver.org Discussion List] Objet : [isalist] Re: RE : Re: RE : Re: ISA close the connection after 50 PASV http://www.ISAserver.org Hi Oliver, That sounds like a poorly-coded client. What app is it? is it acting as a Web proxy, FW or SecureNAT client? PASV needs to be sent only once; until you send a PORT command, your current connection stays PASV. ================================================== Votre email a ete controle avec AntiVir par www.leclubauto.com le 30/01/2003 16:57:30 (TM)