pureftp默认支持匿名用户的，但是默认的匿名用户要登录必须满足一下两个条件：

1.确保有ftp用户grep ftp /etc/passwd

2.确保有ftp用户主目录

usermod -d /data ftp

默认支持匿名用户上传，匿名用户上传是根据用户主目录权限来控制的

chown ftp:ftp /data/upload

匿名用户可调参数：

# Don’t allow authenticated users – have a public anonymous FTP only.#是否只让匿名登录AnonymousOnly               no

# Disallow anonymous connections. Only allow authenticated users.#不允许匿名连接，仅允许认证用户使用NoAnonymous                 no

# Are anonymous users allowed to create new directories ?#允许匿名用户创建新目录AnonymousCanCreateDirs      no

# If the system is more loaded than the following value,# anonymous users aren’t allowed to download.#如果系统被loaded超过下面的值，匿名用户会被禁止下载MaxLoad                     4

# Upload/download ratio for anonymous users.#匿名用户的上传/下载的比率# AnonymousRatio                1 10

# Maximum bandwidth for anonymous users in KB/s#匿名用户的最大带宽（KB/s）# AnonymousBandwidth            8

# Disallow anonymous users to upload new files (no = upload is allowed)#不接受匿名用户上传新文件(no=允许上传)AnonymousCantUpload         no

# This option is useful with servers where anonymous upload is# allowed. As /var/ftp is in /var, it save some space and protect# the log files. When the partition is more that X percent full,# new uploads are disallowed.#最大磁盘利用率MaxDiskUsage               99

# Disallow downloading of files owned by “ftp”, ie.# files that were uploaded but not validated by a local admin.# 是否允许下载匿名用户上传的文件？NO 为允许下载。否则会出现这个#文件没有被管理员核准下载的提示。AntiWarez yes

参考资料：http://www.crazylemon.net/ftp/96.htmlhttp://tech.ddvip.com/2008-10/122310831173588.html