The asadmin deploy command property jar-signing-alias specifies the alias for the security certificate with which the application client container JAR file is signed.
Java Web Start won't execute code requiring elevated permissions unless it resides in a JAR file signed with a certificate that the user's system trusts. For your convenience, GlassFish Server signs the JAR file automatically using the self-signed certificate from the domain, s1as. Java Web Start then asks the user whether to trust the code and displays the GlassFish Server certificate information.
To sign this JAR file with a different certificate, first add the certificate to the domain keystore. You can use a certificate from a trusted authority, which avoids the Java Web Start prompt, or from your own company, which users know they can trust. To add a certificate to the domain keystore, see Administering JSSE Certificates in Oracle GlassFish Server 3.0.1 Administration Guide.
Next, deploy your application using the jar-signing-alias property. For example:
asadmin deploy --property jar-signing-alias=MyAlias MyApp.ear
For more information about the asadmin deploy command, see the Oracle GlassFish Server 3.0.1 Reference Manual.