To view the HTTP header, check for the HTTP Headers widget in the detailed log view in
Monitor > Logs > URL filtering
tab. If there are multiple URLs in a single session, each URL has a separate log with its own set of HTTP headers. The associated headers are grouped together and can be viewed as a set of related logs. Further, to aid in correlating data and analyzing web activity across the network, the HTTP Header options are also displayed with the corresponding threat logs and Wildfire logs.