Configuring Talend Administration Center and Talend JobServer for default Job artifact signature

When using the default Talend-issued signing key, configure Talend Administration Center and Talend JobServer to verify the default signature.

Procedure

Open the Configuration.properties file in a text editor.
The file is located in the Talend Administration Center installation directory.
Set the signature mode property:
```
signature.model=0
```
The signature.model property accepts the following values: 0 for default Talend signature, 1 for no signature, 2 for custom signature.
Save the file and restart Talend Administration Center for the changes to take effect.
Open the Talend JobServer configuration file in a text editor:
- Linux: <JobServer_installation>/conf/TalendJobServer.properties
- Windows: <JobServer_installation>\conf\TalendJobServer.properties
Set the following properties as needed:
```
org.talend.remote.jobserver.commons.config.JobServerConfiguration.SIGNATURE_CHECK_ENABLE=true
```
- SIGNATURE_CHECK_ENABLE=true: Talend JobServer verifies the default signature before running Jobs.
Save the file and restart Talend JobServer for the changes to take effect.

Troubleshooting: If the certificate expires, deactivate the verification or use custom signing keys to sign your Jobs.

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