Is it possible to put restrictions on passphrases used with SSH key-based authentication?
Issue
- We want to have the following restrictions in place on a server for incoming SSH connections which are authenticated via public key:
- Private/public key pair should have a passphrase
- Passphrase should have a minimum length of 8 characters
- Reject Keys with Passphrases that have Dictionary based passwords, letter, number sequences or usernames
- Passphrase should have at least one number and one special character
- Passphrase should have combinations of uppercase and lowercase letters
Environment
- Red Hat Enterprise Linux
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