Methods, non-transitory computer readable media, network traffic management apparatuses, and network traffic management systems that identify when a domain name identifier in a received request matches one of a plurality of domain names stored in a whitelist domain name storage. When the identification indicates the received domain name identifier fails to match one of the plurality of domain names stored in the whitelist domain name storage, then a determination is made on whether the received request is a suspicious request. Another storage is updated when the determination indicates the received request is the suspicious request or otherwise updating the received request as a valid request.