implementing-microsegmentation-with-guardicore

Implementing microsegmentation using Akamai Guardicore Segmentation to map application dependencies, create granular network policies, visualize east-west traffic flows, and enforce least-privilege communication between workloads across data centers and cloud.

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Dernière activité de la source: 2 juillet 2026 à 23:25
Langue détectée de SKILL.md: anglais
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name	implementing-microsegmentation-with-guardicore
description	Implementing microsegmentation using Akamai Guardicore Segmentation to map application dependencies, create granular network policies, visualize east-west traffic flows, and enforce least-privilege communication between workloads across data centers and cloud.
domain	cybersecurity
subdomain	zero-trust-architecture
tags	["microsegmentation","guardicore","akamai","zero-trust","east-west-traffic","network-segmentation","lateral-movement"]
version	1.0
author	mahipal
license	Apache-2.0
nist_csf	["PR.AA-01","PR.AA-05","PR.IR-01","GV.PO-01"]
mitre_attack	["T1078","T1190","T1059","T1021","T1550"]
source	https://github.com/mukul975/Anthropic-Cybersecurity-Skills
source_commit	04450304b12645cb2b974ab96d28c0664758a88d
note	Vendored verbatim from an external Apache-2.0 security-skill library, pinned by commit. Exceeds the internal 300-line skill guideline (agent-code-constraints.md) -- kept as-is because this is vendored reference material (forensics/threat-intel procedure), not Yana AI-authored content, and trimming would damage technical accuracy.

Implementing Microsegmentation with Guardicore

When to Use

When implementing east-west traffic controls to prevent lateral movement within data centers
When needing application-level visibility into network communication patterns before writing segmentation policies
When segmenting workloads across heterogeneous environments (VMs, containers, bare metal, cloud)
When compliance frameworks (PCI DSS, HIPAA) require network segmentation validation
When deploying zero trust at the network layer with process-level granularity

Do not use for perimeter-only security (use traditional firewalls), for environments with fewer than 50 workloads where VLANs/security groups suffice, or when network team lacks capacity for ongoing policy management.

Prerequisites

Akamai Guardicore Segmentation license (Enterprise or Premium)
Guardicore Management Server deployed (on-prem or SaaS)
Agent deployment access to target workloads (Linux, Windows, Kubernetes)
Network visibility: SPAN/TAP ports or VPC flow logs for agentless collection
Application owner engagement for dependency validation

Workflow

Step 1: Deploy Guardicore Agents on Workloads

Install agents to collect process-level network communication data.

# Linux agent installation
curl -sSL https://management.guardicore.com/api/v3.0/agents/download/linux \
  -H "Authorization: Bearer ${GC_API_TOKEN}" \
  -o gc-agent-installer.sh
chmod +x gc-agent-installer.sh
sudo ./gc-agent-installer.sh \
  --management-url=https://management.guardicore.com \
  --site-id=datacenter-east \
  --label="web-tier"

# Windows agent installation (PowerShell)
# Invoke-WebRequest -Uri "https://management.guardicore.com/api/v3.0/agents/download/windows" `
#   -Headers @{"Authorization"="Bearer $GC_API_TOKEN"} `
#   -OutFile gc-agent-installer.exe
# Start-Process -FilePath .\gc-agent-installer.exe `
#   -ArgumentList "--management-url=https://management.guardicore.com","--site-id=datacenter-east" `
#   -Wait

# Kubernetes DaemonSet deployment
cat > gc-daemonset.yaml << 
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: guardicore-agent
  namespace: guardicore
spec:
  selector:
    matchLabels:
      app: gc-agent
  template:
    metadata:
      labels:
        app: gc-agent
    spec:
      hostNetwork: 
      hostPID: 
      containers:
      - name: gc-agent
        image: guardicore/agent:latest
        securityContext:
          privileged: 
        :
        - name: GC_MANAGEMENT_URL
          value: 
        - name: GC_API_KEY
          valueFrom:
            secretKeyRef:
              name: gc-credentials
              key: api-key
        volumeMounts:
        - mountPath: /host
          name: host-root
      volumes:
      - name: host-root
        hostPath:
          path: /
EOF
kubectl apply -f gc-daemonset.yaml


curl -s  \
  -H  | python3 -m json.tool

# Query discovered application flows via API
curl -s "https://management.guardicore.com/api/v3.0/connections" \
  -H "Authorization: Bearer ${GC_API_TOKEN}" \
  -d '{
    "time_range": {"from": "2026-02-17T00:00:00Z", "to": "2026-02-24T00:00:00Z"},
    "filter": {
      "source_label": "web-tier",
      "destination_label": "app-tier"
    },
    "aggregation": "process",
    "limit": 1000
  }' | python3 -m json.tool

# Export application dependency map
curl -s "https://management.guardicore.com/api/v3.0/maps/export" \
  -H "Authorization: Bearer ${GC_API_TOKEN}" \
  -d '{
    "format": "json",
    "labels": ["web-tier", "app-tier", "db-tier"],
    "time_range": "7d"
  }' -o app-dependency-map.json

# Typical discovery findings:
# web-tier -> app-tier: TCP 8080, 8443 (expected)
# app-tier -> db-tier: TCP 5432, 3306 (expected)
# web-tier -> db-tier: TCP 5432 (UNEXPECTED - should be blocked)
# app-tier -> internet: TCP 443 (verify if needed)

# Create labels for application tiers
curl -X POST "https://management.guardicore.com/api/v3.0/labels" \
  -H "Authorization: Bearer ${GC_API_TOKEN}" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "PCI-CDE",
    "description": "Cardholder Data Environment workloads",
    "criteria": {"ip_ranges": ["10.10.0.0/16"]},
    "color": "#FF0000"
  }'

# Create segmentation policy: Allow web-to-app communication
curl -X POST "https://management.guardicore.com/api/v3.0/policies" \
  -H "Authorization: Bearer ${GC_API_TOKEN}" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Web-to-App Allowed",
    "action": "ALLOW",
    "priority": 100,
    "source": {"labels": ["web-tier"]},
    "destination": {"labels": ["app-tier"]},
    "services": [
      {"protocol": "TCP", "port": 8080},
      {"protocol": "TCP", "port": 8443}
    ],
    "log": true,
    "enabled": true,
    "section": "application-segmentation"
  }'

# Create deny policy: Block web-to-database direct access
curl -X POST "https://management.guardicore.com/api/v3.0/policies" \
  -H "Authorization: Bearer ${GC_API_TOKEN}" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Block Web-to-DB Direct",
    "action": "DENY",
    "priority": 200,
    "source": {"labels": ["web-tier"]},
    "destination": {"labels": ["db-tier"]},
    "services": [{"protocol": "TCP", "port_range": "1-65535"}],
    "log": true,
    "alert": true,
    "enabled": true
  }'

# Create ring-fence policy for PCI CDE
curl -X POST "https://management.guardicore.com/api/v3.0/policies" \
  -H "Authorization: Bearer ${GC_API_TOKEN}" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "PCI CDE Ring Fence",
    "action": "DENY",
    "priority": 50,
    "source": {"labels": ["!PCI-CDE"]},
    "destination": {"labels": ["PCI-CDE"]},
    "services": [{"protocol": "TCP", "port_range": "1-65535"}],
    "log": true,
    "alert": true,
    "enabled": true
  }'

# Enable reveal mode (log-only) for new policies
curl -X PATCH "https://management.guardicore.com/api/v3.0/policies/POLICY_ID" \
  -H "Authorization: Bearer ${GC_API_TOKEN}" \
  -d '{"enforcement_mode": "REVEAL"}'

# Check what would be blocked in reveal mode
curl -s "https://management.guardicore.com/api/v3.0/violations" \
  -H "Authorization: Bearer ${GC_API_TOKEN}" \
  -d '{
    "time_range": "24h",
    "policy_id": "POLICY_ID",
    "limit": 100
  }' | python3 -c "
import json, sys
data = json.load(sys.stdin)
for v in data.get('violations', []):
    print(f\"{v['source_ip']}:{v['source_process']} -> {v['dest_ip']}:{v['dest_port']} [{v['action']}]\")
"

# After validation, switch to enforcement
curl -X PATCH "https://management.guardicore.com/api/v3.0/policies/POLICY_ID" \
  -H "Authorization: Bearer ${GC_API_TOKEN}" \
  -d '{"enforcement_mode": "ENFORCE"}'

# Configure SIEM integration for policy violations
curl -X POST "https://management.guardicore.com/api/v3.0/integrations/syslog" \
  -H "Authorization: Bearer ${GC_API_TOKEN}" \
  -d '{
    "name": "Splunk SIEM",
    "host": "splunk-syslog.company.com",
    "port": 514,
    "protocol": "TCP",
    "format": "CEF",
    "events": ["policy_violation", "agent_status", "deception_alert"]
  }'

# Splunk query for microsegmentation violations
# index=guardicore sourcetype=guardicore:policy
# | where action="DENY" AND enforcement_mode="ENFORCE"
# | stats count by src_ip, dst_ip, dst_port, policy_name
# | sort -count

Term	Definition
Microsegmentation	Network security technique creating granular security zones around individual workloads or applications to control east-west traffic
Reveal Mode	Guardicore's simulation mode that logs policy decisions without enforcing them, allowing validation before blocking
Ring-Fence Policy	Isolation policy that restricts all traffic into or out of a defined group of assets (e.g., PCI CDE)
Application Dependency Map	Visual representation of discovered network communication patterns between workloads showing processes, ports, and protocols
East-West Traffic	Network traffic flowing laterally between workloads within a data center, as opposed to north-south traffic crossing the perimeter
Process-Level Visibility	Guardicore's ability to identify which process on a workload initiated or received a network connection

Microsegmentation Deployment Report
==================================================
Organization: E-Commerce Corp
Report Date: 2026-02-23

AGENT DEPLOYMENT:
  Total workloads:            500
  Agents installed:           487 (97.4%)
  Agents active:              482 (98.9%)
  Agentless (flow logs):       13

POLICY COVERAGE:
  Total policies:              45
  Allow rules:                 38
  Deny rules:                   7
  Reveal mode:                  3
  Enforced:                    42

TRAFFIC ANALYSIS (7 days):
  Total flows observed:        2,456,789
  Flows matching allow:        2,441,234 (99.4%)
  Flows matching deny:            15,555 (0.6%)
  Unclassified flows:                 0

PCI CDE ISOLATION:
  CDE workloads:               200
  Ring-fence violations:         0 (last 30 days)
  Authorized CDE entry points:  4
  Lateral movement paths blocked: 95%