由于FTP采用被动方式，所以1024以上的数据传输端口是随机的，这样面临的问题是iptable不能够指定相应的开放端口，我采用的方法是把
VSFTPD的PASV的数据传输端口加以限定，然后开放iptable的相应端口，具体配置文件如下：
vsftpd.conf:
pasv_min_port=YES
pasv_max_port=65530
pasv_min_port=65520
local_root=/home/ftp
max_per_ip=2
#local_max_rate=2000000
#chown_uploads=yes
#chown_username=root
pam_service_name=vsftpd
userlist_enable=YES
userlist_deny=NO
#enable for standalone mode
listen=YES
tcp_wrappers=YES
iptables:
[root@IhepTest ftp]# more /etc/sysconfig/iptables
# Generated by iptables-save v1.2.8 on Fri Jan 19 15:53:31 2007
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [3207:1174055]
:LUZHIGANG - [0:0]
:RH-Firewall-1-INPUT - [0:0]
-A INPUT -j LUZHIGANG
-A INPUT -j RH-Firewall-1-INPUT
-A FORWARD -j RH-Firewall-1-INPUT
-A LUZHIGANG -p tcp -m tcp --sport 65520:65530 -j ACCEPT
-A LUZHIGANG -p tcp -m tcp --dport 65520:65530 -j ACCEPT
-A LUZHIGANG -p tcp -m tcp --dport 3128 -j ACCEPT
-A LUZHIGANG -m state --state RELATED,ESTABLISHED -j ACCEPT
-A RH-Firewall-1-INPUT -i lo -j ACCEPT
-A RH-Firewall-1-INPUT -p icmp -m icmp any -j ACCEPT
-A RH-Firewall-1-INPUT -p esp -j ACCEPT
-A RH-Firewall-1-INPUT -p ah -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp --dport 25 -m state --state NEW -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp --dport 80 -m state --state NEW -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp --dport 21 -m state --state NEW -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp --dport 22 -m state --state NEW -j ACCEPT
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
COMMIT
# Completed on Fri Jan 19 15:53:31 2007