Liunx service usage (xinetd service proxy service, telnet service ,)

Xinetd service

Tftp service

Tftp-0.49-2.i386.rpm Client

Tftp-server-0.49-2.i386.rpm Server

Configuration file directory/etc/xinetd. d/tftp

Service tftp

{

Socket_type = dgram ----------------------- socket type (udp) stream (tcp)

Protocol = udp

Wait = no

User = root

Server =/usr/sbin/in. tftpd ------------- start the program

Server_args =-s-c/tftpboot ---------------- pass the parameter-c to the process to allow Creation

Disable = no-------------------------- whether to enable the Service. yes, it is disabled.

Per_source = 11 ----------------------- Number of connections to each ip Address

Cps = 100 2 --------------------------- stop for 2 seconds when the connection reaches 100

Flags = IPv4

}

Chmod 777/tftpboot

Service xinetd restart

View udp ports

Netstat-anplu | grep: 69

Add-c to upload

Tftp 192.168.1.113

Put

The downloaded directory will be downloaded from tftpboot)

Tftp 192.168.1.113

Get

Bytes ------------------------------------------------------------------------------------------

Telnet Service

Telnet-0.17-39.el5.i386.rpm Client

Telnet-server-0.17-39.el5.i386.rpm Server

Port: 23

Configuration file/etc/xinetd. d/telnet

Isable = no open the service

Check whether the port is enabled

Netstat-anplt | grep: 23

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Use xinetd service proxy ftp

Service vsftp stop: stop vsftp first

Cd/etc/xinetd. d/

Cp tftp

Vim ftp file editing

Service ftp this service corresponds to the vim/etc/services service, so you must write the ftp

{

Socket_type = stream

Wait = no

User = root

Server =/usr/sbin/vsftpd-this corresponds to the usr/sbin/vsftpd program.

Disable = no

}

Netstat-anplt | grep: 21 view vsftp Port

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