• 设置密码到期的天数


    出于安全考虑设置密码规则
    设置密码到期的天数。
    用户必须在天内更改密码。
    此设置仅影响创建用户,而不会影响现有用户。
    如果设置为现有用户,请运行命令“chage -M(days)(user)”。

    PASS_MAX_DAYS 60 # 密码到期时间
    PASS_MIN_DAYS 3 # 初始密码更改时间
    PASS_MIN_LEN 8 # 密码最小长度
    PASS_WARN_AGE 7 # 密码过期提示时间
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    重复密码限制使用
    [root@linuxprobe~]# vi /etc/pam.d/system-auth
    # near line 15: prohibit to use the same password for 5 generation in past

    password sufficient pam_unix.so sha512 shadow nullok try_first_pass use_authtok remember=5
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    设置最小密码长度。
    用户不能设置小于此参数的密码长度。
    # set 8 for minimum password length

    [root@linuxprobe~]# authconfig --passminlen=8 --update
    # the parameter is set in a config below

    [root@linuxprobe~]# grep "^minlen" /etc/security/pwquality.conf
    minlen = 8

    # 在新密码中设置同一类的允许连续字符的最大数目
    # set 4 for maximum number of allowed consecutive characters of the same class

    [root@linuxprobe~]# authconfig --passmaxclassrepeat=4 --update
    # the parameter is set in a config below

    [root@linuxprobe~]# grep "^maxclassrepeat" /etc/security/pwquality.conf
    maxclassrepeat = 4

    # 在新密码中至少需要一个小写字符。
    [root@linuxprobe~]# authconfig --enablereqlower --update
    # the parameter is set in a config below
    # (if you'd like to edit the value, edit it with vi and others)

    [root@linuxprobe~]# grep "^lcredit" /etc/security/pwquality.conf
    lcredit = -1

    # 在新密码中至少需要一个大写字符
    [root@linuxprobe~]# authconfig --enablerequpper --update
    # the parameter is set in a config below

    # (if you'd like to edit the value, edit it with vi and others)
    [root@linuxprobe~]# grep "^ucredit" /etc/security/pwquality.conf
    ucredit = -1

    # 在新密码中至少需要一个数字
    [root@linuxprobe~]# authconfig --enablereqdigit --update
    # the parameter is set in a config below

    # (if you'd like to edit the value, edit it with vi and others)
    [root@linuxprobe~]# grep "^dcredit" /etc/security/pwquality.conf
    dcredit = -1

    # 密码包括至少一个特殊字符
    [root@linuxprobe~]# authconfig --enablereqother --update
    # the parameter is set in a config below

    # (if you'd like to edit the value, edit it with vi and others)
    [root@linuxprobe~]# grep "^ocredit" /etc/security/pwquality.conf
    ocredit = -1

    # 在新密码中设置单调字符序列的最大长度。 (ex⇒'12345','fedcb')
    [root@linuxprobe~]# vi /etc/security/pwquality.conf
    # add to the end
    maxsequence = 3

    # 设置新密码中不能出现在旧密码中的字符数
    [root@linuxprobe~]# vi /etc/security/pwquality.conf
    # add to the end
    difok = 5

    # 检查来自用户passwd条目的GECOS字段的长度超过3个字符的字是否包含在新密码中。
    [root@linuxprobe~]# vi /etc/security/pwquality.conf
    # add to the end
    gecoscheck = 1

    # 设置不能包含在密码中的Ssace分隔的单词列表
    [root@linuxprobe~]# vi /etc/security/pwquality.conf
    # add to the end
    badwords = denywords1 denywords2 denywords3

    # 为新密码设置hash / crypt算法。 (默认为sha512)
    # show current algorithm

    [root@linuxprobe~]# authconfig --test | grep hashing

    password hashing algorithm is md5
    # chnage algorithm to sha512

    [root@linuxprobe~]# authconfig --passalgo=sha512 --update
    [root@linuxprobe~]# authconfig --test | grep hashing
    password hashing algorithm is sha512
    ---------------------
    作者:shaonbean
    来源:CSDN
    原文:https://blog.csdn.net/wh211212/article/details/53992772
    版权声明:本文为博主原创文章,转载请附上博文链接!

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  • 原文地址:https://www.cnblogs.com/xuanbjut/p/11031633.html
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