Error Code 0x80000042 Summary
The error code 0x80000042, also known as an RPC_E_UNSECURE_CREDENTIALS error in Windows environments, typically occurs when a client or server is unable to complete an operation due to security credential issues. This can happen during attempts to establish a secure communication channel where credentials are required but missing, invalid, or mismatched between the client and server sides of a Remote Procedure Call (RPC) interaction. Common scenarios include network services requiring user authentication for access or when attempting to communicate with remote resources over a network that employs security protocols like Kerberos or NTLM. The error is indicative of an issue in verifying the credentials provided by the client, leading to communication failure.
Description of Error Code 0x80000042 and Common Scenarios Where It Occurs
This error can occur in various contexts involving Windows systems and applications relying on RPC services for inter-process communication (IPC) or remote service access. Common occurrences include but are not limited to: accessing network resources that require authentication; attempting to start a service remotely using tools like PsExec; running scripts or executables with elevated privileges over the network; interacting with Microsoft Active Directory Domain Services via scripting languages or administrative consoles. The error often manifests when there’s an issue with credential management, such as incorrect password entry during remote login attempts, mismatched account names and passwords between client machines and target servers, problems with Kerberos ticket-granting tickets (TGTs), invalid security tokens, or expired credentials that need renewal.
Howto solve error code 0x80000042
1. Verify the user credentials: Ensure that the username and password provided are correct for the domain/user combination being accessed.
2. Check network connectivity and firewall rules: Confirm that there is no interruption in the network connection between your client machine and the server, and verify that any firewalls or security software aren’t blocking necessary RPC ports (default port 135).
3. Examine service permissions and access rights: Ensure that the account being used has the appropriate permissions to perform remote actions on the targeted server.
4. Test with different authentication methods: Try connecting using alternative credential management systems such as NTLM instead of Kerberos, or vice versa, depending on your environment’s configuration.
5. Review event logs for additional details: Check system and application event logs both locally and remotely to gather more information about why the security credentials were deemed invalid.
6. Update client software if necessary: Ensure that all clients attempting to connect to services over RPC are running the latest updates, particularly those related to operating system patches or service packs.
7. Reconfigure Kerberos settings (if applicable): If using Kerberos for authentication, ensure proper configuration of realm names, domain controllers, and time synchronization across networked machines.
8. Restart services and reboot systems: Sometimes simply restarting the relevant RPC-related services on both client and server sides or even performing a full system restart can resolve temporary credential validation issues.
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