Can anyone please confirm if the list of logs I created for the audit is sufficient? S.No Technology Log Category Auditable Event Description Security Purpose Source (Device / Log Type) Repository Retention Critical Fields Example Event Audit / Review Use Control Mapping 1 Firewall Traffic Logs Allowed connection Permitted network traffic Verify allowed flows Firewall traffic logs SIEM 365 days src_ip, dest_ip, src_port, dest_port, protocol allow src=10.1.5.21 dst=8.8.8.8 dport=53 Review outbound traffic NIST AC-4 2 Firewall Traffic Logs Blocked connection Denied network traffic Identify attack attempts Firewall traffic logs SIEM 365 days src_ip, dest_ip, dest_port, action deny src=10.1.5.45 dst=203.0.113.15 dport=3389 Detect scanning attempts NIST SI-4 3 Firewall Security Logs IDS/IPS alert Signature based attack detection Detect exploits Firewall threat logs SIEM 365 days src_ip, dest_ip, signature SQL injection detected Investigate attack attempts NIST SI-4 4 Firewall VPN Logs VPN login success Remote access login success Track remote access VPN logs SIEM 365 days user, src_ip, assigned_ip vpn login success user=jdoe Remote access audit NIST AC-17 5 Firewall VPN Logs VPN login failure Failed remote login Detect brute force VPN logs SIEM 365 days user, src_ip, failure_reason vpn login failed user=admin Detect brute force NIST IA-5 6 Firewall Admin Logs Firewall rule change Firewall policy update Track configuration changes Firewall config logs SIEM / Archive 2-3 years admin_user, rule_id rule Allow_HTTP modified Governance review NIST CM-5 7 Load Balancer Traffic Logs HTTP request logs Web request events Detect web attacks Load balancer access logs SIEM 365 days client_ip, url, method, status_code GET /login HTTP 200 Web traffic analysis NIST SI-4 8 Load Balancer Security Logs WAF alerts Web application firewall detection Detect web attacks WAF logs SIEM 365 days src_ip, url, attack_type XSS attack detected Application security review NIST SI-4 9 Load Balancer Admin Logs Configuration change Load balancer configuration update Track changes LB admin logs SIEM 2-3 years admin_user, change_type backend pool updated Change control review NIST CM-3 10 Wireless Controller Access Logs Device authentication User/device WiFi authentication Track wireless access WLAN controller logs SIEM 365 days user, device_mac, ap_id user=jdoe connected AP01 Network access audit NIST AC-2 11 Wireless Controller Access Logs Device association Device connects to access point Monitor network usage WLAN controller logs SIEM 365 days device_mac, ip, ap_id MAC 00:1A:2B connected Detect rogue devices NIST AC-4 12 Windows Authentication Logs Login success Successful user login Monitor user access Windows Security Event 4624 SIEM 365 days user, src_ip, host 4624 logon success Account activity review NIST AU-2 13 Windows Authentication Logs Login failure Failed login attempt Detect brute force Windows Event 4625 SIEM 365 days user, src_ip 4625 logon failed Access anomaly review NIST IA-5 14 Windows System Logs Process creation New process execution Detect malware Windows Event 4688 SIEM 365 days user, process_name, cmdline powershell.exe started Malware investigation NIST SI-4 15 Unix/Linux Authentication Logs SSH login success Successful SSH login Track remote access /var/log/auth.log SIEM 365 days user, src_ip sshd accepted password Server access review NIST AC-2 16 Unix/Linux Privilege Logs sudo command usage Privilege escalation Detect misuse sudo / auditd logs SIEM 365 days user, command sudo useradd Privilege review NIST AC-6 17 Gateway / Proxy Web Logs URL request Web browsing activity Detect risky browsing Proxy logs SIEM 365 days user, url, category GET http://example.com Web activity review NIST AC-4 18 Gateway Security Logs Malware download blocked Malicious file detection Prevent malware Gateway security logs SIEM 365 days src_ip, file_name file blocked trojan.exe Malware investigation NIST SI-3 19 Database Audit Logs Database login success User login to DB Monitor DB access DB audit logs SIEM 365 days db_user, client_ip login user=dbadmin Data access audit NIST AC-2 20 Database Audit Logs Privileged query execution Sensitive query executed Detect data access DB audit logs SIEM 365 days db_user, query_type SELECT customer_data Data access monitoring NIST AU-3 21 Cloud Audit Logs IAM role change Privilege modification Detect escalation AWS CloudTrail / Azure Activity SIEM 365 days user, role_change role admin assigned Privilege audit NIST AC-6 22 Cloud Audit Logs Resource creation New cloud resource created Detect unauthorized deployment Cloud audit logs SIEM 365 days user, resource_type EC2 instance created Cloud governance review NIST CM-3 23 Cloud Access Logs Object storage access File download/upload Monitor data access Cloud storage logs SIEM 365 days user, object_name download file backup.zip Data access monitoring NIST IR-4 ... View more