Health & Medicine

network forensics

Network forensics is a sub-branch of digital forensics relating to the monitoring and analysis of computer network traffic for the purposes of information gathering, legal evidence, or intrusion detection. Unlike other areas of digital forensics,
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  Other Method to Extract Features  Log/Alert data • Anytextthatgetswrittentoafilethatwecanmonitor • Someofitisveryimportant(firewallalerts,availabilityalerts,etc.)andsomeofitislessso • WehavetosetupthingstoproduceGOODalerts • Therearealotoflogsources,sosomesortofmanagementispreferable 2  Log dataTypical sources • Web server • Web proxy • DNS • Operating system (/var/log/) • SMTP • Whatever you’re using to manage logons • Building access controls • HVAC/ICS/SCADA/Power 3  Alert dataTypical sources • IDS • Firewall • Host based IDS • SIEM (Security Information & Event Manager) • Your server uptime and HA (high availability) stuff  • What else? 4  Network Protocol Metadata • Data pertaining to the information contained in a network flow, including but not limited to: • End-points addresses • source address, destination address, source port, destination port • Statistics • byte counts, connection durations, … • Protocol information • DNS queries, SSL certificate DN’s, user -agent strings
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