Something

mygentoo etc # cat /etc/xinetd.d/vsftpd 
# default: off
# description: Vsftpd is an FTP server, designed to be secure.
# $Header: /var/cvsroot/gentoo-x86/net-ftp/vsftpd/files/vsftpd.xinetd,v 1.4 2005/06/07 18:34:17 uberlord Exp $

service ftp
{
        socket_type     = stream
        wait            = no
        user            = root
        server          = /usr/sbin/vsftpd
        server_args     = /etc/vsftpd/vsftpd.conf
        log_on_success  += DURATION 
        nice            = 10
        disable         = no
}
mygentoo etc # cat /etc/hosts.allow 
in.tftpd: 192.168.18.2/128
mygentoo etc # cat /etc/hosts.deny
cat: /etc/hosts.deny: 没有那个文件或目录
mygentoo etc # /etc/init.d/xinetd start
 * Starting xinetd ...                                                                                                                   [ ok ]
mygentoo etc # netstat -tulp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name   
tcp        0      0 *:ftp                   *:*                     LISTEN      28280/xinetd        
tcp        0      0 *:ssh                   *:*                     LISTEN      5697/sshd           
udp        0      0 *:32795                 *:*                                 6144/eva            
udp        0      0 *:32796                 *:*                                 6144/eva            
udp        0      0 *:tftp                  *:*                                 28280/xinetd        
mygentoo etc # ps aux|grep ftp
root     28285  0.0  0.0   4216   760 pts/1    S+   18:25   0:00 grep --colour=auto ftp
mygentoo etc # 
mygentoo etc # iptables -L
iptables v1.3.8: can't initialize iptables table `filter': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.
mygentoo etc #