OCI: Instance 20 Second Delay After Bad Password Login Attempt in SSH
Applies to
Oracle Cloud Infrastructure - Version N/A and later
Linux x86-64
Symptoms
When a wrong password is used when logging into an instance using SSH password authentication, there is a delay of 20 seconds before the next password prompt is displayed.
Cause
The /etc/pam.d/system-auth or /etc/pam.d/password-auth files include entries for LDAP/AD
authentication in addition to local user authentication.
Example: auth required pam_env.so auth required pam_tally2.so deny=3 unlock_time=2 auth sufficient pam_unix.so nullok try_first_pass auth sufficient pam_krb5.so try_first_pass realm=<LDAP-DOMAIN1> auth sufficient pam_krb5.so try_first_pass realm=<LDAP-DOMAIN2> auth requisite pam_succeed_if.so uid >= 500 quiet_success auth required pam_deny.so
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