User Guide

94 Chapter 7 Solving Problems
Solving Problems With File Transfer Protocol (FTP)
FTP Connections Are Refused
• Verify that the user is entering the correct DNS name or IP address for the server.
• Make sure FTP service is turned on.
• Make sure the user has appropriate access privileges to the shared volume.
• See if the maximum number of connections has been reached. To do this, open
Server Admin, select FTP in the Computers & Services list, and click Overview. Note
the number of connected users, click Settings, click General, and compare to the
maximum user settings you have set.
• Verify that the user’s computer is configured correctly for TCP/IP. If there doesn’t
appear to be a problem with the TCP/IP settings, use a “pinging” utility to check
network connections.
• See if there is a DNS problem by trying to connect using the IP address of the FTP
server instead of its DNS name. If the connection works with the IP address, there
may be a problem with the DNS server.
• Verify that the user is correctly entering his or her short name and typing the correct
password. User names and passwords with special characters or double-byte
characters will not work. To find the user’s short name, double-click the user’s name
in the Users & Groups list.
• See if there are any problems with directory services, and if the directory services
server is operating and connected to the network. For help with directory services,
see the Open Directory administration guide.
• Verify that IP filter service is configured to allow access to the appropriate ports. If
clients still can’t connect, see if the client is using FTP passive mode and turn it off.
Passive mode causes the FTP server to open a connection to the client on a
dynamically determined port, which could conflict with port filters set up in IP filter
service.
Clients Can’t Connect to the FTP Server
• See if the client is using FTP passive mode, and turn it off. Passive mode causes the
FTP server to open a connection on a dynamically determined port to the client,
which could conflict with port filters set up in IP filter service.
Anonymous FTP Users Can’t Connect
• Verify that anonymous access is turned on.
• See if the maximum number of anonymous user connections has been reached. To
do this, open Server Admin and click FTP in the Computers & Services list.
LL2346.Book Page 94 Friday, August 22, 2003 2:38 PM