레드햇에 기본적으로 깔리는 ftp데몬이 wu-ftp잖아요.... 
                           그런데 wu-ftp 가 맘에 안들어서.....뭐
 사용자 상위 디렉으로 이동을 제한하는거나 
                           사용상의 제어가 proftpd 가 편한것
같아서.... 

                           그래서 wu-ftpd를 지우고 proftpd를 깔았는데
이게 불능이네요... 
                           rpm으로 깔아도 그렇고 소스로 깔아도
그러한데.... 
                           메세지는 
                           421 Service not available, remote server has closed
connection 
                           인데요 서비스를 이용할수 없다 .서버가
접속을 끊었다 인것 같은데요... 
                           왜 그렇죠??? 
                           리붓도 여러번해보고 .......... 
                           proftpd.conf를 나름데로 설정를 해보고
안되서 옆에서 돌아가고 있는 기본으로 
                           proftpd가 깔리고 잘돌아가는 녀석의 것을
가져다 해보아도 마찮가지 입니다... 
                           어떻게 해야하는 지요..... 
                           제발 고수님들의 도움을 바랍네다..... 

                           아래에 설정파일 첨부할께요. 

                          
######################################################################### 
                           # # 
                           # ProFTPD Korea User Groups # 
                           # http://proftpd.oops.org # 
                           # # 
                          
######################################################################### 
                           # ADDED : JoungKyun Kim <admin@oops.org 
                           # If exist miss configuration, report me to via email 
                          
######################################################################### 

                           # This is a basic ProFTPD configuration file (rename it
to 
                           # 'proftpd.conf' for actual use. It establishes a single
server 
                           # and a single anonymous login. It assumes that you have
a user/group 
                           # "nobody" and "ftp" for normal
operation and anon. 

                           ServerName "ProFTPD For Korean" 

                           # Determined Server operation mode 
                           ServerType standalone 
                           #ServerType inetd 
                           DefaultServer on 
                           ServerAdmin feel73@yahoo.co.kr 

                           # This directive is set CHROOT for account 
                           #DefaultRoot ~ !groupname 

                           # permit to login root permisstion. If you are using PAM
module, 
                           # first delete root line from ftpusers file 
                           RootLogin off 

                           # Port 21 is the standard FTP port. If select Server
operation mode 
                           # "standalone", U must delete hash mark(#) from
Port line. 
                           # Else if select Server operation mode "inetd",
you must config port 
                           # number in /etc/services 
                           # 
                           Port 21 


                           # Umask 022 is a good standard umask to prevent new dirs
and files 
                           # from being group and world writable. 
                           Umask 022 

                           # Use Pam Module (required /etc/pam.d/ftp) 
                           # please read /usr/doc/proftpd-version/README.PAM 
                           # 
                           AuthPAMAuthoritative on 

                           # Time that start time of end time of ftp service. This
value 
                           # is followed 24 time format 
                           # 
                           # UpTime 10 
                           # DownTime 23 

                           # Deny glob() dos attack before verson 1.2.1 
                           DenyFilter \*.*/ 


                           # Config some access time. After some seconds that user
has no action, 
                           # connection is closed. ( 0 is unlimited ) 
                           TimeoutIdle 600 
                           TimeoutNoTransfer 600 
                           TimeoutLogin 0 

                           # DeferWelcome prevents proftpd from displaying the
servername 
                           # until a client has authenticated. 
                           DeferWelcome off 

                           # We want 'welcome.msg' displayed at login, and
'.message' displayed 
                           # in each newly chdired directory. 
                           DisplayLogin /etc/proftpd/conf/welcome.msg 
                           DisplayFirstChdir .message 

                           # To prevent DoS attacks, set the maximum number of child
processes 
                           # to 30. If you need to allow more than 30 concurrent
connections 
                           # at once, simply increase this value. Note that this
ONLY works 
                           # in standalone mode, in inetd mode you should use an
inetd server 
                           # that allows you to limit maximum number of processes
per service 
                           # (such as xinetd) 
                           #MaxInstances 30 

                           # Set the user and group that the server normally runs
at. 
                           User nobody 
                           Group nobody 

                           # Support upload/download ratios 
                           # please read /usr/doc/proftpd-version/mod_ratio.c 
                           # 
                           # Ratios on 
                           # HostRatio foobar.net 100 10 5 100000 

                           # Normally, we want files to be overwriteable. 

                           AllowOverwrite on 


                           # Show the dot(hidden) files 
                           # LsDefaultOptions "-a" 

                           # A basic anonymous configuration, no upload directories.


                           User ftp 
                           Group ftp 
                           RequireValidShell off 

                           # AnonRequirePassword on 
                           # ShowSymlinks off 

                           # We want clients to be able to login with
"anonymous" as well as "ftp" 
                           UserAlias anonymous ftp 

                           # Limit the maximum number of anonymous logins 
                           MaxClients 10 

                           # The MaxClientsPerHost directive configures the maximum
number of clients 
                           # allowed to connect per host. The optional argument
message may be used 
                           # which will be displayed to a client attempting to
exceed the maximum 
                           # value. If message is not supplied, a system-wide
default message is used. 
                           MaxClientsPerHost 3 "Sorry, 3 connection allow per
one host" 

                           # maximum number of authenticated clients that can log
into the server for 
                           # any given user. 
                           MaxHostsPerUser 1 "Sorry, 1 connection allow per one
user name" 

                           # hide files that possess follow owner and group_owner 
                           #HideUser root 
                           #HideGroup root 

                           # Restricted bandwidth. this value is set byte. 
                           #RateReadBPS 256 
                           #RateReadFreeBytes 5120 
                           #RateReadHardBPS on 

                           # We want 'welcome.msg' displayed at login, and
'.message' displayed 
                           # in each newly chdired directory. 
                           DisplayLogin welcome.msg 
                           DisplayFirstChdir .message 

                           # Limit WRITE everywhere in the anonymous chroot 

                           DenyAll 


                           # Upload directory, allow upload and mkdir, deny
download. 
                           # 
                           # 
                           # 
                           # DenyALL 
                           # 
                           # 
                           # AllowALL 
                           # 
                           #