NETWORK - Firewall and segmentation

3 days ago


karnataka, India Zensar Technologies Full time

DescriptionNetwork Segmentation OperationsImplement and manage segmentation across VLANs, subnets, and security zones (e.g., User, Server, OT/IoT, DMZ, Partner, PCI zones).Enforce zone-based policies—least privilege, deny-by-default; maintain inter-zone matrix (who can talk to whom).Execute segmentation change requests: policy updates, NAT changes, and group membership changes.Maintain asset-to-zone mappings and tagging (e.g., using identity awareness / dynamic objects).Validate segmentation efficacy using test plans (ping/TCP checks, app flow validation).Solid understanding of TCP/IP, routing, VLANs, NAT, DNS, and VPN technologies.Proven experience in Network Segmentation / Micro-Segmentation projectsExperience performing Network Risk Analysis and mitigation planning.Configure, deploy, and manage Checkpoint Next-Generation Firewalls (NGFW) and related security gateways.Check Point Firewall AdministrationDaily management in SmartConsole (R80.x): access policies, NAT, Application Control/URLF, IPS, Threat Prevention profiles.Manage Gateways & Clusters (Gaia OS): HA status, sync, failover readiness, VPN communities.Run policy verification (Hit counts, Unused/Shadowed rules, Rule order optimization).Maintain objects hygiene: networks, hosts, groups, services, dynamic objects.Backups & snapshots of Gaia and SmartCenter; track policy revisions.Monitoring & Incident HandlingMonitor logs/SmartEvent for anomalies (deny spikes, drops, high CPU/conn table pressure).First-responder for connectivity issues related to segmentation (blocked flows, NAT misconfig, asymmetric routing).Perform packet captures (fw monitor, tcpdump) and interpret rule-matching logic.Escalate to L3 with structured analysis (flow diagrams, rule references, timestamps, correlations).Operational ExcellenceExecute change windows with pre/post validation and rollback plans.Keep runbooks and as-built documentation updated (zones, policies, rule intent).Support audits/compliance (PCI/SOX/ISO): evidence collection, rule attestation, policy reviews.Participate in rule life-cycle: request → risk review → implement → recertify → retireRequired Skills & ExperienceTechnical Skills:Solid understanding of segmentation concepts: VLAN, VRF, DMZ, east–west vs north–south traffic, zero-trust principles.Hands-on with Check Point (R80.x): SmartConsole, Gaia CLI, policy layers, Threat Prevention, Identity Awareness.Networking fundamentals: TCP/IP, routing (static/OSPF/BGP basics), NAT (hide/static), HA clustering.Troubleshooting: fw monitor, tcpdump, log analysis, rule hit counts, connection table analysis.Familiarity with proxy/DNS/DHCP touchpoints for segmentation changes.Experience:7–10 years in network security operations or firewall management.Exposure to enterprise-scale segmentation projects.Certifications (Preferred):Check Point Certified Security Administrator (CCSA) or higher.CCNA/CCNP or equivalent networking certifications.



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