Monitor, analyze, build rules, and validate policies, hands-on firewall defense
Detect and mitigate a SYN flood from a distributed botnet using rate limiting, SYN cookies, and geo-blocking.
Detect and prevent east-west lateral movement between network segments using VLAN isolation and internal firewall rules.
Detect and block data exfiltration via DNS tunneling, unauthorized cloud uploads, and covert outbound channels.
Implement application-aware microsegmentation with identity-based policies, deny-by-default posture, and least-privilege access controls.
Detect and prevent NAT slipstreaming and hairpin NAT abuse that allow attackers to bypass perimeter controls.
Identify and close IPv6 security gaps in a dual-stack network where IPv6 tunneling and RA spoofing bypass IPv4 firewalls.
Configure Layer 7 deep packet inspection to detect protocol anomalies and prevent application-layer attacks bypassing port-based rules.
Identify and fix split tunneling vulnerabilities where remote workers bypass corporate security controls.
Implement outbound traffic restrictions to prevent data exfiltration, C2 communications, and unauthorized external access.
Deploy and tune Suricata IPS inline with the firewall to detect advanced threats while minimizing false positives.
Configure and tune ModSecurity WAF rules to block web application attacks while maintaining availability for legitimate users.
Audit multi-cloud security groups and NACLs to identify overpermissive rules, rule shadowing, and cross-account exposure in AWS/Azure/GCP.