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SCO限制ROOT用户远程登录的几种方法

第一种方法:

  屏蔽telnet功能。

  telnet功能被屏蔽掉后,任何用户都无法登录,当然ROOT也无法登录。但这种方法太过极端。故不可取。

  第二方法:

  在/etc/default/login中增加一行命令

  CONSOLE=tty01

  经过这样设置后,用户只能在第一个控制台上以ROOT登录。任何其他控制台和所有远程用户均无法登录。

  第三种方法:

  只允许指定的用户以ROOT用户远程登录

  若服务器的地址为134.33.86.13;允许地址为134.33.86.17和134.33.86.18的机器以ROOT登录。

  1. 首先编辑/etc/hosts文件,内容如下:

  127.0.0.1 local

  134.33.86.13 jnzy.jndx.com

  134.33.86.17 root2

  134.33.86.18 root3

  2. 写一段程序放入文件/.profile中

  # @(#) root.profile 68.1 98/01/20

  #

  # Copyright (C) 1989-1998 The Santa Cruz Operation, Inc.

  # All Rights Reserved.

  # The information in this file is provided for the exclusive use of

  # the licensees of The Santa Cruz Operation, Inc. Such users have the

  # right to use, modify, and incorporate this code into other products

  # for purposes authorized by the license agreement provided they include

  # this notice and the associated copyright notice with any such product.

  # The information in this file is provided "AS IS" without warranty.

  #

  TY=`tty|cut -b 9-12`

  WH=`finger|cut -b 32-79|grep "$TY"|cut -b 29-39`

  KK=`tty|cut -b 6-9`

  if [ "$KK" = "ttyp" ]

  then

  WH=$WH

  else

  WH="local"

  fi

  trap 1 2 3 9 15

  if [ "$WH" = "local" -o "$WH" = "root2" ]

  then

  SHELL=/bin/sh

  HOME=/

  PATH=/bin:/etc:/usr/bin:/tcb/bin:/zy

  # set terminal type

  eval `tset -m scoansi:${TERM:-scoansi} -m :\?${TERM:-scoansi} -e -r -s -Q`

  export TERM PATH SHELL HOME

  [ -x /bin/mesg ] && mesg n # if mesg is installed...

  date

  else

  echo "you can not telnet by root:\07\07" #拒绝登录并响铃告警

  echo "press any key to exit"#按任意键退出

  read sad

  exit

  fi

  这样只有在IP地址为134.33.8.17和134.33.86.18两台机器上能以ROOT用户登录,其他地址不可以用ROOT登录。

  从而保证系统安全。

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