在网络应用中,最广泛的当属WWW和FTP这两种。FTP就是File Transport PRotocol文件传输协议的缩写,FTP服务器能够在网络上提供文件传输服务。FTP服务器根据服务对象的不同可分为匿名服务器(Anonymous Ftp Server)和系统FTP服务器。前者是任何人都可以使用,后者就只能是在FTP服务器上有合法账号的人才能使用。
# This is a basic ProFTPD configuration file (rename it to # ''proftpd.conf'' for actual use. It establishes a single server # and a single anonymous login. It assumes that you have a user/group # "nobody" and "ftp" for normal Operation and anon.
# Umask 022 is a good standard umask to prevent new dirs and files
# from being group and world writable. Umask 022 #默认
RequireValidShell off #保证匿名用户正常登录,不要更改
ServerIdent off #不显示ftp服务器版本信息,以增强安全性
# To prevent DoS attacks, set the maximum number of child processes # to 30. If you need to allow more than 30 concurrent connections # at once, simply increase this value. Note that this ONLY works # in standalone mode, in inetd mode you should use an inetd server # that allows you to limit maximum number of processes per service # (such as xinetd) MaxInstances 30
# Set the user and group that the server normally runs at.
User nobody #设置FTP服务以nobody运行
Group nobody #注意:原来是“Group nobody”,一定要改为“Group nobody”
# Normally, we want files to be overwriteable.
AllowOverwrite on
# A basic anonymous configuration, no upload directories.下面一段就是匿名服务的设置。
User ftp #匿名登录使用ftp用户
Group ftp #匿名登录使用ftp组
# We want clients to be able to login with "anonymous" as well as "ftp"