Log Data
Analytical data contained inside log files offer insights into unraveling patterns, anomalies, and potential security breaches within complex systems. This section introduces and defines several different types of logs, as follows:
- Firewall logs: Firewalls protect your network by controlling what traffic enters and leaves your network and use an access control list (ACL) to control the flow of traffic. When a firewall is installed, there is only a singular rule by default:
deny all. This means that all traffic is blocked by default, and you therefore need to make exceptions to allow other traffic into and out of the network. Firewall logs hold information about incoming and outgoing traffic, including source and destination IP addresses, ports, and protocols. By scrutinizing these logs, investigators can identify unauthorized access attempts, track potential intrusions, and recognize patterns of malicious activity.
The following table represents an example firewall...
