Hopefully I understood your question, but this might be your problem. I just glanced at the tutorial and didn't see any reference to this. FTP utilizes two ports in the transaction, normally 21 and 20 (21 = control and 20 = data) By default with FTP it assumes that any port you attempt to negotiate a session on like 221, it will try to pass the data on one port number less (in your case port 220) Mike sure that nothing is using 220 and that you do not have it blocked. You might reference http://www.iana.org/assignments/port-numbers to see what port numbers to use and then do a NETSTAT -A -N on your ISA server to view the ports in use on your internal and external NICs. imap3 220/tcp Interactive Mail Access Protocol v3 imap3 220/udp Interactive Mail Access Protocol v3 # James Rice <RICE@xxxxxxxxxxxxxxxxxxxxxx> fln-spx 221/tcp Berkeley rlogind with SPX auth fln-spx 221/udp Berkeley rlogind with SPX auth - Jeff -----Original Message----- From: Champ [mailto:colter@xxxxxxxxxxxx] Sent: Monday, September 17, 2001 4:09 PM To: [ISAserver.org Discussion List] Subject: [isalist] ISA Server and High FTP port using another application http://www.ISAserver.org I am using Serv-U FTP, and I have read over the learning zone notes. These notes describe in some detail how to make the high port work. I am using the new version of Serv-U and have run into a few problems using the credtool.exe. When trying to use the credtool.exe with the proper service which is now Serv-U and not Serv-u32. I checked for the service name on the server and its name is Serv-U, so i assume after researching that this will be the bracketed name in the wspcfg.ini file. WSPCFG FILE [Serv-U] ServerBindTcpPorts=221 LocalBindTcpPorts=20 Persistent=1 KillOldSession=1 ForceCredentials=1 The firewall client is installed correctly and working as well. After getting the correct information in the .ini file I try using Credtool and get errors every single time. When I type in credtool -r -n c:\progra~1\Serv-U\ServUDaemon which is the executable that starts the program, i get this error ERROR: Authentication data were not found for [c:\progra~1\Serv-U\ServUDaemon] Am i missing something with the configuration of the .ini file or the credtool.exe.....does anyone have any idea where i should go next so i can this high port running. Thanks in Advance, Colter Bowman ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: jeff.butte@xxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')