UbuntuでTelnetサーバを構成する

1947 ワード

1.      linux      
 Linux             inetd(InterNET services Daemon),   Internet    ,          。         inetd     ,        inetd        。              ,  inetd    /etc/inetd.conf         。inetd                              ,                 TCP UDP       ,             ,inetd          。         inetd       ,inetd          tcpd   。tcpd      host.{allow,deny}            。                ( :ftpd、 telnet)    。        TCP_Wrapper。
xinetd(eXended InterNET services Daemon)     inetd+tcp_wrapper   ,         。      Linux              xinetd   inetd,         、            ,  Linux   Internet        。          xinetd :FTP、IMAP、POP telnet 。/etc/services                      ,  xinetd   ,         ,xinetd                        ,                   ,               ,    ,xinetd                ,     sleep  ,          。
 
2.    
 
1、$sudo apt-get install xinetd telnetd
 2、$sudo vim /etc/inetd.conf       :
telnet stream tcp nowait telnetd /usr/sbin/tcpd /usr/sbin/in.telnetd
 
3、$sudo vim /etc/xinetd.conf       :
# 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
}
includedir /etc/xinetd.d
 
4、$sudo vim /etc/xinetd.d/telnet       :
# 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
}
 
5、           $sudo /etc/init.d/xinetd restart
6、        (   telent      Ubuntu   )
   :  TELNET     (putty     )  
    :XP dos(   →  →cmd) ,  telnet,   open Ubuntu IP  (  :open 192.168.7.106)