This example will demonstrate how a Palo Alto Networks firewall in conjunction with WildFire can discover zero-day malware downloaded by an end user, even if the traffic is SSL encrypted. After WildFire identifies the malware a log is sent to the firewall and the firewall alerts the administrator who then contacts the user to eradicate the malware. WildFire then generates a new signature for the malware and firewalls with a Threat Prevention or WildFire subscription automatically downloads the signature to protect against future exposure. Although some file sharing web sites have an antivirus feature that checks files as they are uploaded, they can only protect against known malware.