Something

ServerName                      "FTO Server"
ServerType                      standalone
DeferWelcome                    off
ServerIdent                     on "Servidor ftp"

DefaultServer                   on
ShowSymlinks                    off
AllowOverwrite                  off

AllowRetrieveRestart            yes
AllowStoreRestart               yes

DirFakeGroup                    on
DirFakeUser                     on ftp
DirFakeMode                     0777

TimeoutNoTransfer               600
TimeoutStalled                  100
TimeoutIdle                     200

DenyFilter                      \*.*/

Port                            21

MaxInstances                    2

AccessGrantMsg                  "-= Bienvenido %u, tu acceso ha sido realizado correctamente =-"
AccessDenyMsg                   "Estas intentando acceder a un servidor privado, tus datos de conexión han sido grabados, salga inmediatamente"

LogFormat       default "%h %l %u %t \"%r\" %s %b"
LogFormat       auth    "%v [%P] %h %t \"%r\" %s"
LogFormat       write   "%h %l %u %t \"%r\" %s %b"
TransferLog     /var/log/proftpd/transfer
ExtendedLog     /var/log/proftpd/proftpd.down_up_log WRITE,READ write
ExtendedLog     /var/log/proftpd/proftpd.auth_log      AUTH auth
ExtendedLog     /var/log/proftpd/proftpd.paranoid_log  ALL default

DefaultRoot                     ~
AuthUserFile                    "/etc/passwd"
AuthGroupFile                   "/etc/group"

DefaultRoot ~

MaxClients                   6 "Perdona, max %m usuarios -- Prueba después"
MaxClientsPerHost            2 "Solo 2 conexiones por HOST"
MaxClientsPerUser            2 "Solo 2 conexiones por usuario"

RequireValidShell            off

<Limit LOGIN>
   Order   deny,allow
   Deny    from 10.0.0.1, 10.0.0.255
   Allow   
from all
</limit>

<Directory /ftp>
  Umask                         022
  AllowOverwrite                off

  <Limit READ>
        AllowAll
  </Limit>
</Directory>
<Directory /ftp/subir>
   Umask                         022
   AllowOverwrite                on

   <Limit READ WRITE>
          DenyAll
   </Limit>

   <Limit STOR> AllowAll
   </Limit>

</Directory>

<Anonymous /ftp/anonimo>
        AccessGrantMsg          "-= Bienvenido al FTP anonimo =-"
        User                     ftp
        Group                    nogroup

        UserAlias                anonymous ftp

        RequireValidShell        off

        MaxClients               5
        MaxClientsPerHost        1
        MaxClientsPerUser        5 
<Directory /ftp/anonimo>
     Umask                         077  077

     AllowOverwrite                off
  </Directory>
</Anonymous>