ftp server in rhel6

What is FTP ?

• ftp server is used to transfer files between server and clients.
•  All major operating system supports ftp.
•  ftp is the most used protocol over internet to transfer files. Like most Internet operations, FTP works on a client/ server model. 
• FTP client programs can enable users to transfer files to and from a remote system running an FTP server program.
•  A user on the remote system has to log in to an account on a server and can then transfer files to and from that account's directories only.
• A special kind of user account, named ftp, allows any user to log in to it with the username “anonymous.”
• This account has its own set of directories and files that are considered public, available to anyone on the network who wants to download them.

Service Profile:-
Package-   vsftpd     (very secure file transfer protocol daemon)
daemon-  vsftpd
configuration file-
1-   /etc/vsftpd/vsftpd.conf
2-  /etc/vsftpd/ftpusers  (Contains users list to deny permanently)
3- /etc/vsftpd/user_list   (Contain users list to allow or deny)
port number-
20  (data transfer)
21  (control connection)
log file-
/var/log/xferlog
/var/log/vsftpd.log
DocumentRoot-  /var/ftp/

Note-
/var/ftp/pub is the ftp path for anonymous user to upload and download. 

Install Vsftpd FTP Server

#yum install vsftpd*  -y

#service vsftpd restart
#chkconfig vsftpd on
#netstat -tunlp | grep vsftpd
#mkdir  -p /var/ftp/pub/upload
#mkdir -p /var/ftp/pub/download
#cd /var/ftp/pub/download
#touch   a1 a2 a3 a4 a5
#ls
#chmod  -R  777 /var/ftp/pub
#service iptables stop
#chkconfig iptables off

Note- 
*Bydefault download operation is allow for all ftp and anonymous users in ftp server configuration file.
*You can use command line and gui tool for download any files from ftp server.

Ftp client tools:
1- ftp
2-lftp
3- wget
4- firefox
5- filezila


How to Accessing the FTP Server  from Linux Client machine - for GET operation test

On client machine-

#rpm -qa ftp*
#yum install ftp*  -y
#ftp 192.168.0.1

Open the configuration file, edit like this :

# vi /etc/vsftpd/vsftpd.conf

FTP Server Configuration – For  Anonymous Access 
 *Generally, the anonymous user has no permission to upload file in ftp server.
 *To provide  upload in ftp server follow the steps:
*Append Thease all lines :-

anonymous_enable=YES
anon_upload_enable=YES
anon_mkdir_write_enable=YES
anon_root=/var/ftp/pub    
ftpd_banner=Welcome to KR Network Cloud FTP server. 

FTP Server Configuration- For ftp users only

local_enable=NO                        (Restrict Access to Anonymous User Only)
write_enable=NO                          (Disable  FTP upload)

FTP Server Configuration-  ftp limit settings

local_max_rate=50
max_per_ip=5
max_clients=10
dirmessage_enable=YES
xferlog_enable=YES
connect_from_port_20=YES
xferlog_file=/var/log/vsftpd.log
xferlog_std_format=YES
idle_session_timeout=600
data_connection_timeout=120
listen=YES         (for ipv4)
#listen_ipv6=YES
pam_service_name=vsftpd
userlist_enable=YES
tcp_wrappers=YES

FTP server Configuration- limits users their home directory only

chroot_local_user=YES      

:wq
save and exit

#service vsftp restart
#chkconfig vsftpd on

for troubleshoot Selinux Error before upload any files from client side..

#chcon -R -t public_content_rw_t  /var/ftp/pub
#ls -lZ /var/ftp/pub
#getsebool -a | grep ftp
#setsebool -P  allow_ftpd_anon_write=1
#setsebool -P allow_ftpd_full_access=1
#setsebool -P ftp_home_dir=1
#getsebool  -a | grep ftp

FTP Server Configuration- Other required Settings.

FTP Command

Command	Description
ascii	Set ascii transfer type
bell	Beep when command completed
binary	Set binary transfer type
bye	Terminate ftp session and exit
cd	Change remote working directory
cdup	Change remote working directory to parent directory
chmod	Change file permission of remote file
dir	List content of remote directory
delete	Delete remote file
get	Recive file from remote server
image	Set binary transfer type
lcd	Change local working directory
ls  -a	List content of remote directory
mdelete	Delete multiple file
mdir	Make directory on the remote machine
mget	Get multiple file
mkdir	Make directory on the remote machine
mls	List content of multiple directory
mput	Send multiple file
pwd	Print working directory on remote machine
quit	Terminate ftp session and exit
rmdir	Remove directory on the remote machine
rename	Rename file
rstatus	show status of remote machine
type	set file transfer type