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PostgreSQL 11 Administration Cookbook

You're reading from   PostgreSQL 11 Administration Cookbook Over 175 recipes for database administrators to manage enterprise databases

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Product type Paperback
Published in May 2019
Publisher Packt
ISBN-13 9781789537581
Length 600 pages
Edition 1st Edition
Languages
Concepts
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Authors (3):
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Gianni Ciolli Gianni Ciolli
Author Profile Icon Gianni Ciolli
Gianni Ciolli
Sudheer Kumar Meesala Sudheer Kumar Meesala
Author Profile Icon Sudheer Kumar Meesala
Sudheer Kumar Meesala
Simon Riggs Simon Riggs
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Simon Riggs
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Toc

Table of Contents (14) Chapters Close

Preface 1. First Steps FREE CHAPTER 2. Exploring the Database 3. Configuration 4. Server Control 5. Tables and Data 6. Security 7. Database Administration 8. Monitoring and Diagnosis 9. Regular Maintenance 10. Performance and Concurrency 11. Backup and Recovery 12. Replication and Upgrades 13. Other Books You May Enjoy

Checking whether all users have a secure password


PostgreSQL has no built-in facilities to make sure that you are using strong passwords.

The best you can do is to make sure that all user passwords are encrypted, and that your pg_hba.conf file does not allow logins with a plain password; that is, always use the SCRAM-SHA-256 login method for users, which was added in PostgreSQL 10. Any servers upgrading from earlier versions should upgrade from md5 to SCRAM-SHA-256 password encryption.

For client applications connecting from trusted private networks, either real or virtual (VPN), you may use host-based access, provided you know that the machine on which the application is running is not used by some non-trusted individuals. For remote access over public networks, it may be a better idea to use SSL client certificates.

How to do it…

To see which users don't yet have SCRAM encrypted passwords, use this query:

test2=# select usename,passwd from pg_shadow where passwd
not like ‘SCRAM%’ or passwd...
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