FTP-SERVER

                          VSFTPD-SERVER
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FTP  - File  Transfer  Protocol

Port no. - 20/21

Package  - vsftpd

Daemon   - vsftpd

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                               THE BASIC CONCEPT OF FTP-SEVER
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* FTP (File Transfer Protocol ) is the generic term for a group of computer programs aimed at facilitating the transfer of files or data from one computer to another. It originated in the "Massachusetts Institute of Technology " (MIT) in the early 1970s.

FTP Concepts and Definitions

  The key definition to remember is the term "protocol," which means a set of rules or standards that govern the interactions between computers. It is a key component in many terms that are now taken for granted: FTP which, as has been said, sets the rules for transferring files between computers.

FTP transfer data in 2 forms 'ASCII' and  'Binary'
  ASCII (American Standard code for Information Interchange), codes text nto binary (e.g. 0 or 1 ) sequences of 7 numbers per text item.
    e.g. A = 01000000

  
 
 Objectives of FTP were:

   1. to promote sharing of files ( computer programs and /or data),
   2. to encourage indirect or implicit (via programs ) use of remote computers,
   3. to shield a user from variations in file storage systems among hosts, and
   4. to transfer data reliably and efficiently.


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Configuration instruction
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    *Install the package 'vsftpd'

    #yum  install  vsftpd* -y

    *Configure  the '/etc/vsftpd/vsftpd.conf'

    #vim   /etc/vsftpd/vsftpd.conf

    anonymous  - enable = yes
                = no  [ change yes = no ]
   
    userlist_enable     =yes
                =no   [ change yes = no ]                 

    :wq   save the file

    #service  vsftpd   restart

    (Note:- if we want to share other user to access for it we have to change yes =  no )

    *If = yes,  it means only anonymous can  access through ftp. If we want to that anonymous can't loging
    through 'ftp' for it we have to change  yes = no

                        yes = no

    *Add the users in FTP

     #vim /etc/vsftpd/user_list

    root                  no  - Access
                  yes - Not Access                         
    bin 
   
    daemon    

    tom

    dic

    harry

    :wq   save the  file

    #service  vsftpd    restart

    #service  network   restart

    *Add the port no. in Firewall (iptables)

    #iptabels  -I  INPUT  -s  192.168.0.0/24  -p  tcp  -m  multiport  --dport  20,21 -j  ACCEPT

            (SAME WITH 'UDP' PROTOCOL )

    #service  iptables  save

    #service  iptables  restart
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