IDS

Jan 1, 0001

Definition

An Intrusion Detection System (IDS) is a security mechanism designed to monitor network or system activities for malicious actions or policy violations. It analyzes traffic patterns to detect potential threats and alerts administrators to suspicious activities. IDS can be network-based (NIDS) or host-based (HIDS), each focusing on different aspects of the IT environment to provide comprehensive security monitoring.

Secure Settings Example

# Example configuration for a network-based IDS using Snort
snort:
  - interface: eth0
  - alert_mode: fast
  - detection_engine:
      - rules_path: /etc/snort/rules
      - include: /etc/snort/snort.conf
  - output:
      - alert_syslog: LOG_AUTH LOG_ALERT
  - preprocessors:
      - frag3_global: config detection: search-method lowmem
      - stream5_global: config detection: search-method ac

Insecure Settings Example

# Example of insecure IDS configuration
snort:
  - interface: eth0
  - alert_mode: none  # Alerts are not generated
  - detection_engine:
      - rules_path: /etc/snort/rules
      - include: /etc/snort/snort.conf
  - output:
      - alert_syslog: LOG_AUTH LOG_ALERT
  - preprocessors:
      - frag3_global: config detection: search-method lowmem
      - stream5_global: config detection: search-method ac