Run Zeek in your environment to map out what protocols are actively used. If DNS traffic suddenly spikes or starts utilizing non-standard ports, your baseline will immediately highlight the anomaly.
Step example:
When a packet is too large for a network segment (exceeding the Maximum Transmission Unit or MTU), a router may fragment it. The packet is split into smaller pieces, each with the same Identification Number in the IP header, but different Fragment Offsets. sec503 intrusion detection indepth pdf 258
Identifying data exfiltration via DNS tunneling and fast-flux malicious domains.
SEC503: Network Monitoring and Threat Detection In-Depth. ... Gain technical knowledge in network monitoring and threat detection. SANS Institute SEC503: Intrusion Detection In-Depth - SANS Institute Run Zeek in your environment to map out
Structuring rules to avoid catastrophic backtracking and high CPU utilization. Behavioral and Protocol Analysis (Zeek / Bro)
Used by attackers for OS fingerprinting and traceroute mapping; highly useful for detecting routing loops or packet injection. The packet is split into smaller pieces, each
The primary objective of this material is simple: By understanding the exact structure of network protocols, an analyst can determine whether an alert represents a true threat or a benign anomaly. 2. Foundational TCP/IP Architecture and Mechanics
The course is primarily for security professionals responsible for network monitoring and threat hunting.