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https://issues.apache.org/jira/browse/RANGER-3687?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17524022#comment-17524022
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Pradeep Agrawal commented on RANGER-3687:
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[~kirbyzhou] [~bpatel] : I would suggest to set this field length to 650 if you
are planning to use VARCHAR datatype. generated password length is fixed to
either 32/64/128 character. since you are storing max 5 passwords then no. of
separator ( ,) will be 4. which make it length of 644 ((128*5)+4).
> Password Policy Best Practices for Strong Security
> --------------------------------------------------
>
> Key: RANGER-3687
> URL: https://issues.apache.org/jira/browse/RANGER-3687
> Project: Ranger
> Issue Type: Improvement
> Components: Ranger
> Affects Versions: 3.0.0, 2.3.0
> Reporter: Bhavik Patel
> Assignee: Bhavik Patel
> Priority: Major
> Fix For: 3.0.0, 2.3.0
>
>
> # Password history should be configured to restrict users from reusing their
> last 4 or 5 passwords.
> # Forcing users to change passwords every 90-180 days
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