setup telnet server on Ubuntu

1.Install telnet use this command in terminal(Applications/Accessories/Terminasudo apt-get install xinetd telnetd

 

2.Edit /etc/inetd.conf using your favourite file editor with root permission,add this line:

telnet stream tcp nowait telnetd /usr/sbin/tcpd /usr/sbin/in.telnetd


 

3.Edit /etc/xinetd.conf ,make its content look like following:




# Simple configuration file for xinetd # # Some defaults, and include /etc/xinetd.d/ defaults { # Please note that you need a log_type line to be able to use log_on_success # and log_on_failure. The default is the following : # log_type = SYSLOG daemon info instances = 60 log_type = SYSLOG authpriv log_on_success = HOST PID log_on_failure = HOST cps = 25 30 }

4.You can change telnet port number by edit /etc/services with this line:

telnet        23/tcp 
 

 

5.If you’re not satisfied with default configuration.Edit etc/xinetd.d/telnet ,add following:

# default: on # description: The telnet server serves telnet sessions; it uses # unencrypted username/password pairs for authentication. service telnet { disable = no flags = REUSE socket_type = stream wait = no user = root server = /usr/sbin/in.telnetd log_on_failure += USERID }  


add these lines as you like:

only_from = 192.168.120.0/24 #Only users in 192.168.120.0 can access to only_from = .bob.com #allow access from bob.com no_access = 192.168.120.{101,105} #not allow access from the two IP. access_times = 8:00-9:00 20:00-21:00 #allow access in the two times ......


6.Use this command to start telnet server:

sudo /etc/init.d/xinetd restart 
 

 







源文出处：http://ubuntuguide.net/install-and-enable-telnet-server-in-ubuntu-linux