Quick troubleshooting view
A previously transparent SMB access now requires a user name and password….
- Check the name used
- Test the access to the domain
- List Existing Connections
- Close obsolete SMB sessions
- Correct DNS/name of access
- Reauthentify with the planned account
Contextual technician plan
Prefer the expected DNS name rather than an IP if the environment requires it.
Net useThe command should complete without an unexpected error and return data consistent with the intended service.
If the result is normal, keep this layer lower in the hypothesis ranking and continue with the next discriminating check.
If the result is abnormal, preserve the output and investigate this layer before making broader changes.
Control DNS and authentication.
klistValid Kerberos tickets should be visible when the session/service requires Kerberos.
Kerberos ticketing is present; continue with SPN, authorization or service checks.
Check time, DNS, domain reachability, credentials and Kerberos events before changing trust relationships.
SMB sessions with other identifiers may conflict.
“List Existing Connections” should produce an observation that clearly confirms or rules out “Changed password”.
If the observation is normal, lower “Changed password” in the ranking and continue with the next distinct check.
If the observation is abnormal, keep the evidence and investigate “Changed password” first. Related action: Reauthentify with the planned account.
Delete only those identified as obsolete.
“Check Saved Identifiers” should produce an observation that clearly confirms or rules out “Server seen under a different alias.”.
If the observation is normal, lower “Server seen under a different alias.” in the ranking and continue with the next distinct check.
If the observation is abnormal, keep the evidence and investigate “Server seen under a different alias.” first.
Repeat the same validation test after the correction and confirm the original symptom is gone. Validate stability before closing the incident.
Before changing configuration, record the current value and a way back.
Squad if the ID requests appear on many positions simultaneously.
A previously transparent SMB access now requires a user name and password.
Causes probables
- Kerberos/NTLM session.
- DNS
- Changed password
- Server seen under a different alias.
- Relationship to the domain.
- registered credentials.
Diagnostic étape par étape
- 1
Check the name used
Prefer the expected DNS name rather than an IP if the environment requires it.
- 2
Test the access to the domain
Control DNS and authentication.
- 3
List Existing Connections
SMB sessions with other identifiers may conflict.
- 4
Check Saved Identifiers
Delete only those identified as obsolete.
Commands utiles
Net useklistSolutions possibles
- Close obsolete SMB sessions
- Correct DNS/name of access
- Reauthentify with the planned account
Squad if the ID requests appear on many positions simultaneously.