在LINUX系统上建立FTP加密传输

# cp /usr/share/ssl/openssl.cnf ./
# openssl req -new -x509 -nodes -config openssl.cnf -out proftpd.crt –keyout proftpd.key
这里安装提示需要输入证书信息略

把证书和密匙复制到指定目录：
# cp proftpd.crt proftpd.key /etc/

最后创建PROFTPD启动教本：

# vi /etc/init.d/proftpd
================ ================ =================
#!/bin/sh
# Startup script for ProFTPD
# chkconfig: 345 85 15
# description: ProFTPD is an enhanced FTP server
# processname: proftpd
# config: /etc/proftpd.conf
# Source function library.
. /etc/rc.d/init.d/functions

if [ -f /etc/sysconfig/proftpd ]; then
. /etc/sysconfig/proftpd
fi
PATH="$PATH:/usr/local/proftpd/sbin"
# See how we were called.
case "$1" in
start)
echo -n "Starting proftpd: "
daemon proftpd $OPTIONS
echo
touch /var/lock/subsys/proftpd
;;
stop)
echo -n "Shutting down proftpd: "
killproc proftpd
echo
rm -f /var/lock/subsys/proftpd
;;
status)
status proftpd
;;
restart)
$0 stop
$0 start
;;
reread)
echo -n "Re-reading proftpd config: "
killproc proftpd -HUP
echo
;;
suspend)
hash ftpshut >/dev/null 2>&1
if [ $? = 0 ]; then
if [ $# -gt 1 ]; then
shift
echo -n "Suspending with '$*' "
ftpshut $*
else
echo -n "Suspending NOW "
ftpshut now "Maintanance in progress"
fi
else
echo -n "No way to suspend "
fi
echo
;;
resume)
if [ -f /etc/shutmsg ]; then
echo -n "Allowing sessions again "
rm -f /etc/shutmsg
else
echo -n "Was not suspended "
fi
echo
;;
*)
echo -n "Usage: $0 {start|stop|restart|status|reread|resume"
hash ftpshut
if [ $? = 1 ]; then
echo '}'
else
echo '|suspend}'
echo 'suspend accepts additional arguments which are passed to ftpshut(8)'
fi
exit 1
esac

if [ $# -gt 1 ]; then
shift
$0 $*
fi
exit 0
================ ================ =================

# chomd 755 /etc/init.d/proftpd
# chkconfig –-add proftpd
# chkconfig proftpd on

到这里ftp服务器端安装配置完毕，登陆服务器的客户端我用了完全免费的FileZilla（前两天网上看到说FileZilla支持SSL不错）。FileZilla的配置也比较简单。本服务器支持两种客户端加密连接方式：

1. FTP over ssl (显示加密)方式连接。
2. FTP over tls (显示加密) 方式连接

如下图所示：

[ 本帖最后由 llzqq 于 2005-12-3 07:42 编辑 ]

2. FTP over tls (显示加密)

2. FTP over ssl (显示加密)

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