一、环境说明

腾讯 云主机或者Ucloud云云主机，系统为Centos6 X86_64位，云主机本地不需要开启防火墙，只需要控制台安全组做防火墙策略就行,如下截图放开pureftpd的登录端口

二、pureftpd源码编译安装

yum -y install make gcc gcc-c++ gcc-g77 openssl openssl-devel
wget https://download.pureftpd.org/pub/pure-ftpd/releases/pure-ftpd-1.0.49.tar.gz
tar xf pure-ftpd-1.0.49.tar.gz
cd pure-ftpd-1.0.49
./configure --prefix=/usr/local/pureftpd CFLAGS=-O2 --with-puredb --with-quotas --with-cookie --with-virtualhosts --with-diraliases --with-sysquotas --with-ratios --with-altlog --with-paranoidmsg --with-shadow --with-welcomemsg --with-throttling --with-uploadscript --with-language=english --with-rfc2640 --with-ftpwho --with-tls
make &&make install
chmod +x /etc/init.d/pureftpd
 chkconfig pureftpd on
touch /usr/local/pureftpd/etc/pureftpd.passwd
touch /usr/local/pureftpd/etc/pureftpd.pdb
echo "export PATH=$PATH:/usr/local/pureftpd/sbin:/usr/local/pureftpd/bin" > /etc/profile.d/pureftpd.sh
source /etc/profile

三、pureftpd配置文件介绍

下面是生成环境pure-ftpd.conf的配置文件参数,pureftpd的配置文件中参数后面是不支持#号注释的，所以生产上要去掉参数后面的#注释，否则启动pureftpd会报错

[root@10-9-156-50 ~]# cat  /usr/local/pureftpd/etc/pure-ftpd.conf
chrootEveryone               yes
BrokenClientsCompatibility   no
MaxClientsNumber             50
Daemonize                    yes
MaxClientsPerIP              10
VerboseLog                   no
DisplayDotFiles              yes
AnonymousOnly                no
NoAnonymous                  yes
SyslogFacility               ftp
DontResolve                  yes
MaxIdleTime                  15
PureDB                       /usr/local/pureftpd/etc/pureftpd.pdb
LimitRecursion               10000 8
AnonymousCanCreateDirs       no
MaxLoad                      4
PassivePortRange             2037 2045      ###端口范围默认是20000到30000之间，安全起见可以给定的小一点
ForcePassiveIP               117.50.12.93   ##云主机默认的网卡为内网卡，所以此处必须绑定VPS的外网ip
AntiWarez                    yes
Bind                         ,2038
Umask                        133:022
MinUID                       100
AllowUserFXP                 no
AllowAnonymousFXP            no
ProhibitDotFilesWrite        no
ProhibitDotFilesRead         no
AutoRename                   no
AnonymousCantUpload          yes
PIDFile                      /var/run/pure-ftpd.pid
MaxDiskUsage                   99
UserBandwidth                80   ##默认允许上传才8KB

问题的原因：服务器存在内网IP，而pureftp没有设置被动模式返回的IP地址，默认返回了内网的IP导致客户端无法链接。
参考链接：http://blog.hanlei.org/pureftpd%E7%99%BB%E5%BD%95%E5%90%8E%E8%8E%B7%E5%8F%96%E7%9B%AE%E5%BD%95%E5%A4%B1%E8%B4%A5%E7%9A%84%E9%97%AE%E9%A2%98/

四、pure-ftpd日常操作应用

说明：为了安全起见purevtpd一般是禁止匿名用户登录ftp的，pureftpd服务主要是通过服务器本地的系统虚拟用户来创建ftp的登录账户的。然而在选用服务器系统本地的虚拟用户是有要求的，要求虚拟用户的uid不能小于100，要是uid小于100的话，通过此虚拟用户创建的ftp登录账户是登录不了ftp的，会提示密码不正确（这个是经过本人多次验证测试过的）
对于web服务的站点工程目录一般给的权限是www或者apache的系统虚拟用户的权限

4.1采用系统默认的虚拟apache的用户

如果采用的是系统默认存在的apache用户的话，此用户默认的uid和gid都是48，小于100，必须直接修改成大于等于100的数值

默认值如下：

[root@localhost ~]# grep apache /etc/passwd
apache:x:48:48::/home/apache:/sbin/nologin
[root@localhost ~]# grep apache /etc/group
apache:x:48:
[root@localhost www]# id  apache
uid=48(apache) gid=48(apache) groups=48(apache)

直接编辑配置文件修改后的值如下：

[root@localhost ~]# grep apache /etc/passwd
apache:x:100:100::/home/apache:/sbin/nologin
[root@localhost ~]# grep apache /etc/group
apache:x:100:
[root@localhost www]# id  apache
uid=100(apache) gid=100(apache) groups=100(apache)

给工程站点目录授权apache的权限：

chown -R apache.apache /data/www/test/

指定apache系统虚拟用户创建ftp登录账户：sansan

[root@localhost www]# pure-pw list
[root@localhost www]# pure-pw useradd sansan -u apache -d /data/www/test
Password: 
Enter it again: 
[root@localhost www]# pure-pw  mkdb

[root@localhost www]# cat /usr/local/pureftpd/etc/pureftpd.passwd 
sansan:$6$92arGKjDIi/aODb0$SmyMeKUpsIYXVAqarsPH9xWqO4bdOqYKUXmP8TyUFlwTbTcvGhfJiW2pNMP56J3rHzSYp.mwCP8UB30MttMK01:100:100::/data/www/test/./::::::::::::

通过Xftp客户端登录ftp账户sansan

到此处演示完成

4.2登录系统新建虚拟用户www来创建ftp登录账户

[root@localhost home]# useradd www -s /sbin/nologin -M
[root@localhost home]# id www
uid=1003(www) gid=1003(www) groups=1003(www)
[root@localhost home]# chown -R www.www /data/www/test
[root@localhost home]# pure-pw list
sansan             /data/www/test/./                                          
[root@localhost home]# pure-pw useradd huahua -u www -d /data/www/test
Password: 
Enter it again: 
[root@localhost home]# 
[root@localhost home]# pure-pw mkdb
[root@localhost home]# pure-pw list
sansan             /data/www/test/./                                          
huahua              /data/www/test/./                                          
[root@localhost home]# cat /usr/local/pureftpd/etc/pureftpd.passwd 
sansan:$6$92arGKjDIi/aODb0$SmyMeKUpsIYXVAqarsPH9xWqO4bdOqYKUXmP8TyUFlwTbTcvGhfJiW2pNMP56J3rHzSYp.mwCP8UB30MttMK01:100:100::/data/www/test/./::::::::::::
huahua:$6$oUXu6U/V/UNM7K50$ztuftPKh7ZuzkHkY.XdNlQOmr6i6krlVQ0Mhsv7kuK5Qppvz440T55fRlssB5GrKkmMrSR220I5lU3yEA5Zsu/:1003:1003::/data/www/test/./::::::::::::
[root@localhost home]# 

通过filezilla ftp工具登录ftp账户huahua

上传文件成功

五、centos6系统上的pureftpd的启动脚本：

pureftpd服务启动脚本：

[root@localhost ~]# cat /etc/init.d/pureftpd 
#!/bin/bash
#
# chkconfig: 2345 85 15
# description: Pure-FTPd is an FTP server daemon based upon Troll-FTPd
# processname: pure-ftpd

### BEGIN INIT INFO
# Provides:          pureftpd
# Required-Start:    $all
# Required-Stop:     $all
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts pureftpd server
# Description:       starts pureftpd server
### END INIT INFO

# Author:   licess
# website:  https://lnmp.org

# Pure-FTPd Settings
PURE_FTPD="/usr/local/pureftpd/sbin/pure-ftpd"
PURE_CONF="/usr/local/pureftpd/etc/pure-ftpd.conf"
PURE_PID="/var/run/pure-ftpd.pid"
RETVAL=0
prog="Pure-FTPd"

start() {
    echo -n $"Starting $prog... "
    $PURE_FTPD $PURE_CONF
    if [ "$?" = 0 ] ; then
        echo " done"
    else
        echo " failed"
    fi
}

stop() {
    echo -n $"Stopping $prog...  "
    if [ ! -f "$PURE_PID" ]; then
        echo -n $"$prog is not running."
        exit 1
    fi
    kill `cat $PURE_PID`
    if [ "$?" = 0 ] ; then
        echo " done"
    else
        echo " failed"
    fi
}

restart(){
    echo $"Restarting $prog..."
    $0 stop
    sleep 2
    $0 start
}

status(){
    if [ -f "$PURE_PID" ]; then
        echo $"$prog is running."
    else
        echo $"$prog is not running."
    fi
}

case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        restart
        ;;
    status)
        status
        ;;
  *)
        echo $"Usage: $0 {start|stop|restart}"
esac

官方文档：https://download.pureftpd.org/pub/pure-ftpd/doc/README.Virtual-Users

到此处演示完成了。欢迎感兴趣的网友一起交流学习