打開服務器上的shell窗口,按以下步驟操作:
1.執行命令:sudo apt-get intall xinted telnetd //安裝telnet軟件包,sudo命令需輸入當前用戶密碼
2.安裝成功後系統有相應提示。執行命令:sudo vim /etc/xinetd.conf //打開telnet配置文件
3.在編輯窗口裏對照下面的代碼,添加進紅色的部分,然後保存關閉編輯窗口。
# 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(插入紅色部分
)
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 進入編輯窗口,添加以下紅色部分。
# default: on
# description: The telnet server serves telnet sessions; it uses /
# unencrypted username/password pairs for authentication.
service telnet
{
disable = no
bind =219.228.57.4
only_from=219.228.1.0/24
#上面這兩行說明僅提供內部網段!
Instance =UNLIMITED
Nice =0
flags = REUSE
socket_type = stream
wait = no
user = root
server = /usr/sbin/in.telnetd
log_on_failure += USERID
}
5. 重啓:sudo restart
or 重啓網絡服務:sudo /etc/init.d/xinetd restart (service xinetd restart 也可以)
6. 現在就可以使用非root用戶登錄了。