Based on the 'test dns' CLI command below, the SG received a response from the DNS server with 'Name error'.
SGOS#test dns www.example.com 10.10.10.10 bypass-cache
Performing DNS lookup for: www.example.com
Sending A query for www.example.com to 10.10.10.10.
Error encountered. Response error code: Name error
DNS Resolver Response: Host not found