graph TB
 A[Internet/External Networks] --> B[DDoS Protection & WAF]
 B --> C[Network Perimeter Firewalls]
 C --> D[DMZ/Edge Services]
 D --> E[Internal Network Segmentation]
 E --> F[Application Security Controls]
 F --> G[Data Protection Layer]
 G --> H[Identity & Access Management]
 H --> I[Security Monitoring & SIEM]
 I --> J[Incident Response]

# Network policies implementing zero-trust principles
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
 name: wireless-services-zero-trust
 namespace: telecommunications
spec:
 podSelector: {} # Apply to all pods in namespace
 policyTypes:
 - Ingress
 - Egress  # Default deny all traffic
 ingress: []
 egress: [] ---
# Specific allow rules for required communications
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
 name: wireless-billing-ingress
 namespace: telecommunications
spec:
 podSelector:
 matchLabels:
 app: wireless-billing
 policyTypes:
 - Ingress
 ingress:
 - from:
 - namespaceSelector:
 matchLabels:
 name: wireless-admin
 - namespaceSelector:
 matchLabels:
 name: wireless-manager
 ports:
 - protocol: TCP
 port: 8080
 - protocol: TCP
 port: 8443 # TLS port  - from:
 - namespaceSelector:
 matchLabels:
 name: monitoring
 ports:
 - protocol: TCP
 port: 9090 # Metrics port ---
# Egress policy for database connections
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
 name: wireless-billing-egress
 namespace: telecommunications
spec:
 podSelector:
 matchLabels:
 app: wireless-billing
 policyTypes:
 - Egress
 egress:
 - to:
 - namespaceSelector:
 matchLabels:
 name: databases
 ports:
 - protocol: TCP
 port: 5432 # PostgreSQL
 - protocol: TCP
 port: 3306 # MySQL  - to: [] # DNS
 ports:
 - protocol: UDP
 port: 53
 - protocol: TCP
 port: 53  - to: [] # HTTPS outbound for API calls
 ports:
 - protocol: TCP
 port: 443

# VPC and subnet configuration for network isolation
apiVersion: v1
kind: ConfigMap
metadata:
 name: network-segmentation-config
data:
 network-zones.yaml: |
 zones:
 dmz:
 cidr: "10.0.1.0/24"
 purpose: "External-facing services and load balancers"
 security_level: "high"
 allowed_protocols: ["HTTPS", "SSH"]  application:
 cidr: "10.0.10.0/24" 
 purpose: "Application services and APIs"
 security_level: "high"
 allowed_protocols: ["HTTP", "HTTPS", "gRPC"]  data:
 cidr: "10.0.20.0/24"
 purpose: "Database and data storage services"
 security_level: "critical"
 allowed_protocols: ["PostgreSQL", "MySQL", "MongoDB"]  management:
 cidr: "10.0.30.0/24"
 purpose: "Administrative and monitoring services"
 security_level: "critical"
 allowed_protocols: ["SSH", "SNMP", "HTTPS"]  oob:
 cidr: "10.0.40.0/24"
 purpose: "Out-of-band management network"
 security_level: "critical"
 allowed_protocols: ["SSH", "IPMI", "Serial Console"]  firewall_rules:
 - name: "DMZ to Application"
 from_zone: "dmz"
 to_zone: "application"
 action: "allow"
 protocols: ["HTTPS"]
 logging: true  - name: "Application to Data"
 from_zone: "application"
 to_zone: "data" 
 action: "allow"
 protocols: ["PostgreSQL", "MySQL"]
 logging: true  - name: "Management Access"
 from_zone: "management"
 to_zone: "*"
 action: "allow"
 protocols: ["SSH", "HTTPS"]
 conditions: ["source_ip_whitelist"]
 logging: true  - name: "Default Deny"
 from_zone: "*"
 to_zone: "*"
 action: "deny"
 logging: true

# Vault authentication and authorization configuration
apiVersion: v1
kind: ConfigMap
metadata:
 name: vault-auth-config
data:
 vault-config.hcl: |
 # Kubernetes authentication method
 auth "kubernetes" {
 type = "kubernetes"
 }  # Database secrets engine
 secrets "database" {
 type = "database"
 }  # PKI secrets engine for certificate management
 secrets "pki" {
 type = "pki"
 }  # Policies for different service roles
 policy "wireless-billing-policy" {
 path "database/creds/billing-readonly" {
 capabilities = ["read"]
 }  path "database/creds/billing-readwrite" {
 capabilities = ["read"]
 }  path "pki/issue/wireless-services" {
 capabilities = ["create", "update"]
 }  path "secret/data/wireless-billing/*" {
 capabilities = ["read"]
 }
 }  policy "wireless-admin-policy" {
 path "database/creds/admin-readonly" {
 capabilities = ["read"]
 }  path "secret/data/wireless-admin/*" {
 capabilities = ["read", "create", "update", "delete"]
 }  path "pki/issue/admin-services" {
 capabilities = ["create", "update"]
 }
 }  # Role bindings for Kubernetes service accounts
 role "wireless-billing" {
 bound_service_account_names = ["wireless-billing"]
 bound_service_account_namespaces = ["telecommunications"]
 policies = ["wireless-billing-policy"]
 ttl = "1h"
 max_ttl = "24h"
 }  role "wireless-admin" {
 bound_service_account_names = ["wireless-admin"]
 bound_service_account_namespaces = ["telecommunications"]
 policies = ["wireless-admin-policy"] 
 ttl = "1h"
 max_ttl = "24h"
 } ---
# Service account configuration with Vault annotation
apiVersion: v1
kind: ServiceAccount
metadata:
 name: wireless-billing
 namespace: telecommunications
 annotations:
 vault.hashicorp.com/agent-inject: "true"
 vault.hashicorp.com/role: "wireless-billing"
 vault.hashicorp.com/agent-inject-secret-db-creds: "database/creds/billing-readwrite"
 vault.hashicorp.com/agent-inject-template-db-creds: |
 {{- with secret "database/creds/billing-readwrite" -}}
 export DB_USERNAME="{{ .Data.username }}"
 export DB_PASSWORD="{{ .Data.password }}"
 {{- end -}}

# Kubernetes RBAC for telecommunications services
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
 namespace: telecommunications
 name: wireless-service-operator
rules:
- apiGroups: [""]
 resources: ["pods", "services", "endpoints", "configmaps"]
 verbs: ["get", "list", "watch"]
- apiGroups: ["apps"]
 resources: ["deployments", "replicasets"]
 verbs: ["get", "list", "watch", "create", "update", "patch"]
- apiGroups: ["networking.k8s.io"]
 resources: ["networkpolicies"]
 verbs: ["get", "list", "watch"] ---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
 namespace: telecommunications
 name: wireless-service-admin
rules:
- apiGroups: ["*"]
 resources: ["*"]
 verbs: ["*"] ---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
 name: wireless-operators
 namespace: telecommunications
subjects:
- kind: User
 name: jagannath@telecom.com
 apiGroup: rbac.authorization.k8s.io
- kind: Group
 name: telecom:wireless-operators
 apiGroup: rbac.authorization.k8s.io
roleRef:
 kind: Role
 name: wireless-service-operator
 apiGroup: rbac.authorization.k8s.io ---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
 name: wireless-admins
 namespace: telecommunications
subjects:
- kind: User
 name: security-admin@telecom.com
 apiGroup: rbac.authorization.k8s.io
- kind: Group
 name: telecom:security-admins
 apiGroup: rbac.authorization.k8s.io
roleRef:
 kind: Role
 name: wireless-service-admin
 apiGroup: rbac.authorization.k8s.io

# TLS configuration for inter-service communication
apiVersion: networking.istio.io/v1beta1
kind: DestinationRule
metadata:
 name: wireless-services-tls
 namespace: telecommunications
spec:
 host: "*.telecommunications.svc.cluster.local"
 trafficPolicy:
 tls:
 mode: ISTIO_MUTUAL # Mutual TLS for all communications
 minProtocolVersion: TLSV1_3
 cipherSuites:
 - ECDHE-RSA-AES256-GCM-SHA384
 - ECDHE-RSA-CHACHA20-POLY1305 ---
# Certificate management with cert-manager
apiVersion: cert-manager.io/v1
kind: Certificate
metadata:
 name: wireless-services-tls
 namespace: telecommunications
spec:
 secretName: wireless-services-tls-secret
 issuerRef:
 name: internal-ca-issuer
 kind: ClusterIssuer
 commonName: wireless-services.telecommunications.svc.cluster.local
 dnsNames:
 - wireless-billing.telecommunications.svc.cluster.local
 - wireless-admin.telecommunications.svc.cluster.local
 - wireless-manager.telecommunications.svc.cluster.local
 - "*.telecommunications.svc.cluster.local"
 duration: 2160h # 90 days
 renewBefore: 360h # 15 days before expiry ---
# Ingress with TLS termination
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
 name: wireless-services-ingress
 namespace: telecommunications
 annotations:
 nginx.ingress.kubernetes.io/ssl-protocols: "TLSv1.3"
 nginx.ingress.kubernetes.io/ssl-ciphers: "ECDHE-RSA-AES256-GCM-SHA384"
 nginx.ingress.kubernetes.io/force-ssl-redirect: "true"
 nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
spec:
 tls:
 - hosts:
 - api.wireless.telecom.com
 - admin.wireless.telecom.com
 secretName: wireless-external-tls-secret
 rules:
 - host: api.wireless.telecom.com
 http:
 paths:
 - path: /billing
 pathType: Prefix
 backend:
 service:
 name: wireless-billing
 port:
 number: 8443
 - host: admin.wireless.telecom.com
 http:
 paths:
 - path: /
 pathType: Prefix
 backend:
 service:
 name: wireless-admin
 port:
 number: 8443

# Storage encryption configuration
apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
 name: encrypted-storage
provisioner: kubernetes.io/aws-ebs
parameters:
 type: gp3
 encrypted: "true"
 kmsKeyId: "arn:aws:kms:us-east-1:123456789012:key/12345678-1234-1234-1234-123456789012"
volumeBindingMode: WaitForFirstConsumer
allowVolumeExpansion: true ---
# Database encryption configuration
apiVersion: v1
kind: ConfigMap
metadata:
 name: database-encryption-config
data:
 postgresql.conf: |
 # Enable TLS
 ssl = on
 ssl_cert_file = '/etc/ssl/certs/postgresql.crt'
 ssl_key_file = '/etc/ssl/private/postgresql.key'
 ssl_ca_file = '/etc/ssl/certs/ca.crt'
 ssl_crl_file = ''
 ssl_protocols = 'TLSv1.2,TLSv1.3'
 ssl_ciphers = 'ECDHE+AESGCM:ECDHE+CHACHA20:DHE+AESGCM:DHE+CHACHA20:!aNULL:!MD5:!DSS'  # Enable data encryption
 shared_preload_libraries = 'pg_stat_statements,pg_tde'  # Audit logging
 log_statement = 'all'
 log_connections = on
 log_disconnections = on
 log_checkpoints = on
 log_lock_waits = on  mysql.cnf: |
 [mysqld]
 # Enable SSL
 ssl=ON
 ssl-cert=/etc/mysql/ssl/mysql.crt
 ssl-key=/etc/mysql/ssl/mysql.key
 ssl-ca=/etc/mysql/ssl/ca.crt
 require_secure_transport=ON
 tls_version=TLSv1.2,TLSv1.3  # Enable binary logging with encryption
 log-bin=/var/lib/mysql/binlog
 binlog-encrypt=ON  # Enable data-at-rest encryption
 innodb-encrypt-tables=ON
 innodb-encrypt-log=ON
 innodb-encryption-threads=4  # Audit logging
 plugin-load-add=audit_log.so
 audit_log_policy=ALL
 audit_log_format=JSON

# Pod Security Standards enforcement
apiVersion: v1
kind: Namespace
metadata:
 name: telecommunications
 labels:
 pod-security.kubernetes.io/enforce: restricted
 pod-security.kubernetes.io/audit: restricted
 pod-security.kubernetes.io/warn: restricted ---
# Security context for wireless services
apiVersion: apps/v1
kind: Deployment
metadata:
 name: wireless-billing-secure
 namespace: telecommunications
spec:
 replicas: 3
 selector:
 matchLabels:
 app: wireless-billing
 template:
 metadata:
 labels:
 app: wireless-billing
 spec:
 serviceAccount: wireless-billing
 securityContext:
 runAsNonRoot: true
 runAsUser: 1000
 runAsGroup: 1000
 fsGroup: 1000
 seccompProfile:
 type: RuntimeDefault
 containers:
 - name: wireless-billing
 image: telecom/wireless-billing:secure-v2.1.0
 securityContext:
 allowPrivilegeEscalation: false
 readOnlyRootFilesystem: true
 runAsNonRoot: true
 runAsUser: 1000
 capabilities:
 drop:
 - ALL
 resources:
 limits:
 memory: "2Gi"
 cpu: "1000m"
 requests:
 memory: "1Gi"
 cpu: "500m"
 volumeMounts:
 - name: app-config
 mountPath: /app/config
 readOnly: true
 - name: temp-storage
 mountPath: /tmp
 - name: vault-secrets
 mountPath: /vault/secrets
 readOnly: true
 livenessProbe:
 httpGet:
 path: /health
 port: 8080
 scheme: HTTP
 initialDelaySeconds: 30
 periodSeconds: 10
 readinessProbe:
 httpGet:
 path: /ready
 port: 8080
 scheme: HTTP
 initialDelaySeconds: 5
 periodSeconds: 5
 volumes:
 - name: app-config
 configMap:
 name: wireless-billing-config
 - name: temp-storage
 emptyDir:
 sizeLimit: 1Gi
 - name: vault-secrets
 secret:
 <REDACTED> wireless-billing-vault-secrets

# Web Application Firewall (WAF) configuration
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
 name: wireless-api-waf
 namespace: telecommunications
 annotations:
 nginx.ingress.kubernetes.io/modsecurity-snippet: |
 SecRuleEngine On
 SecRequestBodyAccess On
 SecRule REQUEST_HEADERS:Content-Type "application/json" \
 "id:'200001',phase:1,t:none,t:lowercase,pass,nolog,ctl:requestBodyProcessor=JSON"  # Block SQL injection attempts
 SecRule ARGS "@detectSQLi" \
 "id:'200002',phase:2,block,msg:'SQL Injection Attack Detected',logdata:'Matched Data: %{MATCHED_VAR} found within %{MATCHED_VAR_NAME}'"  # Block XSS attempts
 SecRule ARGS "@detectXSS" \
 "id:'200003',phase:2,block,msg:'XSS Attack Detected',logdata:'Matched Data: %{MATCHED_VAR} found within %{MATCHED_VAR_NAME}'"  # Rate limiting
 SecAction "id:'200004',phase:1,nolog,pass,initcol:IP=%{REMOTE_ADDR},setvar:IP.requests_per_minute=+1,expirevar:IP.requests_per_minute=60"
 SecRule IP:REQUESTS_PER_MINUTE "@gt 100" \
 "id:'200005',phase:1,deny,status:429,msg:'Rate limit exceeded'"  nginx.ingress.kubernetes.io/rate-limit: "100"
 nginx.ingress.kubernetes.io/rate-limit-window: "1m"
spec:
 ingressClassName: nginx-waf
 rules:
 - host: api.wireless.telecom.com
 http:
 paths:
 - path: /api/v1
 pathType: Prefix
 backend:
 service:
 name: wireless-api-gateway
 port:
 number: 8443

# Fluentd configuration for security log collection
apiVersion: v1
kind: ConfigMap
metadata:
 name: fluentd-security-config
data:
 fluent.conf: |
 # Input sources for security events
 <source>
 @type tail
 @id audit-logs
 path /var/log/audit/audit.log
 pos_file /var/log/fluentd-audit.log.pos
 tag kubernetes.audit
 format json
 time_key timestamp
 time_format %Y-%m-%dT%H:%M:%S.%NZ
 </source>  <source>
 @type tail
 @id application-security
 path /var/log/containers/wireless-*-security.log
 pos_file /var/log/fluentd-app-security.log.pos
 tag kubernetes.application.security
 format multiline
 format_firstline /^\d{4}-\d{2}-\d{2}/
 format1 /^(?<timestamp>\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}) (?<level>\w+) (?<source>\w+) (?<message>.*)/
 </source>  <source>
 @type tail
 @id network-security
 path /var/log/iptables.log
 pos_file /var/log/fluentd-iptables.log.pos
 tag network.firewall
 format /^(?<timestamp>\w+ \d+ \d+:\d+:\d+) (?<hostname>\S+) kernel: (?<message>.*)/
 </source>  # Filters for security event enrichment
 <filter kubernetes.audit>
 @type record_transformer
 <record>
 security_domain "kubernetes_api"
 severity_level ${record["level"] == "Metadata" ? "info" : "warning"}
 source_ip ${record["sourceIPs"][0] if record["sourceIPs"] else "unknown"}
 </record>
 </filter>  <filter kubernetes.application.security>
 @type record_transformer
 <record>
 security_domain "application"
 severity_level ${record["level"] == "ERROR" ? "high" : "medium"}
 </record>
 </filter>  # Outputs to SIEM system
 <match kubernetes.audit>
 @type elasticsearch
 host elasticsearch-security.monitoring.svc.cluster.local
 port 9200
 index_name kubernetes-audit-logs
 type_name _doc
 include_tag_key true
 tag_key @log_name
 logstash_format true
 logstash_prefix kubernetes-audit
 <buffer>
 @type file
 path /var/log/fluentd-buffers/kubernetes-audit.buffer
 flush_mode interval
 flush_interval 5s
 chunk_limit_size 2M
 queue_limit_length 32
 retry_max_interval 30
 retry_forever true
 </buffer>
 </match>  <match kubernetes.application.security>
 @type elasticsearch
 host elasticsearch-security.monitoring.svc.cluster.local
 port 9200
 index_name application-security-logs
 type_name _doc
 include_tag_key true
 tag_key @log_name
 logstash_format true
 logstash_prefix application-security
 <buffer>
 @type file
 path /var/log/fluentd-buffers/application-security.buffer
 flush_mode interval
 flush_interval 5s
 chunk_limit_size 2M
 queue_limit_length 32
 </buffer>
 </match>

# Prometheus alerting rules for security events
groups:
- name: security-alerts
 rules:
 - alert: UnauthorizedKubernetesAPIAccess
 expr: increase(kubernetes_audit_total{verb="create",objectRef_resource="pods",user!~"system:.*|kubernetes-admin"}[5m]) > 0
 for: 0m
 labels:
 severity: high
 security_domain: kubernetes
 incident_type: unauthorized_access
 annotations:
 summary: "Unauthorized pod creation attempt detected"
 description: "User {{ $labels.user }} attempted to create pods without proper authorization"
 remediation: "Review user permissions and investigate potential compromise"  - alert: AbnormalNetworkTraffic
 expr: rate(container_network_receive_bytes_total[5m]) > 100000000 # 100MB/s
 for: 2m
 labels:
 severity: medium
 security_domain: network
 incident_type: anomalous_traffic
 annotations:
 summary: "Abnormal network traffic detected in {{ $labels.pod }}"
 description: "Pod {{ $labels.pod }} is receiving {{ $value | humanize1024 }}B/s of network traffic"
 remediation: "Investigate potential DDoS or data exfiltration"  - alert: MultipleFailedLogins
 expr: increase(authentication_failures_total[5m]) > 10
 for: 1m
 labels:
 severity: high
 security_domain: authentication
 incident_type: brute_force
 annotations:
 summary: "Multiple authentication failures detected"
 description: "{{ $value }} authentication failures from {{ $labels.source_ip }} in the last 5 minutes"
 remediation: "Block source IP and investigate credential compromise"  - alert: CriticalVulnerabilityDetected
 expr: vulnerability_scanner_critical_count > 0
 for: 0m
 labels:
 severity: critical
 security_domain: vulnerability_management
 incident_type: security_vulnerability
 annotations:
 summary: "Critical security vulnerability detected"
 description: "{{ $value }} critical vulnerabilities found in {{ $labels.container_image }}"
 remediation: "Immediately patch or replace affected container image"  - alert: SuspiciousFileActivity
 expr: increase(file_integrity_violations_total[5m]) > 0
 for: 0m
 labels:
 severity: high
 security_domain: file_integrity
 incident_type: unauthorized_modification
 annotations:
 summary: "Suspicious file modification detected"
 description: "Unauthorized changes to critical files in {{ $labels.pod }}"
 remediation: "Investigate potential compromise and restore from backup"

#!/bin/bash
# security-incident-response.sh set -euo pipefail INCIDENT_TYPE=$1
SEVERITY=$2
AFFECTED_SERVICE=${3:-"unknown"}
SOURCE_IP=${4:-"unknown"} INCIDENT_ID=$(date +%Y%m%d%H%M%S)-$(openssl rand -hex 4)
INCIDENT_DIR="/var/log/security-incidents/$INCIDENT_ID" # Create incident directory and log
mkdir -p "$INCIDENT_DIR"
echo "$(date -u -Iseconds) - Security incident $INCIDENT_ID started" > "$INCIDENT_DIR/incident.log"
echo "Type: $INCIDENT_TYPE, Severity: $SEVERITY, Service: $AFFECTED_SERVICE, Source: $SOURCE_IP" >> "$INCIDENT_DIR/incident.log" log_action() {
 echo "$(date -u -Iseconds) - $1" >> "$INCIDENT_DIR/incident.log"
 echo "$1"
} case $INCIDENT_TYPE in
 "unauthorized_access")
 log_action "Responding to unauthorized access incident"  if [[ "$SEVERITY" == "high" || "$SEVERITY" == "critical" ]]; then
 # Immediate containment actions
 log_action "Implementing immediate containment measures"  # Block source IP
 if [[ "$SOURCE_IP" != "unknown" ]]; then
 iptables -A INPUT -s "$SOURCE_IP" -j DROP
 log_action "Blocked source IP: $SOURCE_IP"
 fi  # Force session termination for affected service
 if [[ "$AFFECTED_SERVICE" != "unknown" ]]; then
 kubectl delete pods -l app="$AFFECTED_SERVICE" -n telecommunications
 log_action "Restarted pods for service: $AFFECTED_SERVICE"
 fi  # Enable enhanced monitoring
 kubectl patch deployment "$AFFECTED_SERVICE" -n telecommunications -p '{"spec":{"template":{"metadata":{"annotations":{"security.monitoring/enhanced":"true"}}}}}'
 log_action "Enabled enhanced monitoring for $AFFECTED_SERVICE"
 fi  # Collect evidence
 log_action "Collecting evidence"
 kubectl logs -l app="$AFFECTED_SERVICE" -n telecommunications --since=1h > "$INCIDENT_DIR/service-logs.txt"
 kubectl get events -n telecommunications --sort-by='.lastTimestamp' > "$INCIDENT_DIR/kubernetes-events.txt"  # Notify security team
 curl -X POST "$SECURITY_WEBHOOK_URL" \
 -H "Content-Type: application/json" \
 -d "{
 \"incident_id\": \"$INCIDENT_ID\",
 \"type\": \"$INCIDENT_TYPE\",
 \"severity\": \"$SEVERITY\",
 \"service\": \"$AFFECTED_SERVICE\",
 \"source_ip\": \"$SOURCE_IP\",
 \"status\": \"contained\",
 \"timestamp\": \"$(date -u -Iseconds)\"
 }"
 ;;  "brute_force")
 log_action "Responding to brute force attack"  # Block attacking IP
 if [[ "$SOURCE_IP" != "unknown" ]]; then
 iptables -A INPUT -s "$SOURCE_IP" -j DROP
 log_action "Blocked brute force source IP: $SOURCE_IP"  # Add to blacklist for 24 hours
 echo "$SOURCE_IP $(date -d '+24 hours' +%s)" >> /var/lib/security/ip-blacklist.txt
 log_action "Added $SOURCE_IP to 24-hour blacklist"
 fi  # Increase authentication monitoring
 kubectl patch configmap security-config -n telecommunications -p '{"data":{"auth_monitoring_level":"enhanced"}}'
 log_action "Enhanced authentication monitoring activated"
 ;;  "anomalous_traffic")
 log_action "Responding to anomalous traffic incident"  if [[ "$SEVERITY" == "high" || "$SEVERITY" == "critical" ]]; then
 # Implement traffic shaping
 log_action "Implementing traffic controls"  # Update ingress annotations to add rate limiting
 kubectl patch ingress wireless-services-ingress -n telecommunications -p '{
 "metadata": {
 "annotations": {
 "nginx.ingress.kubernetes.io/rate-limit": "50",
 "nginx.ingress.kubernetes.io/rate-limit-window": "1m"
 }
 }
 }'
 log_action "Applied aggressive rate limiting"  # Scale up affected services
 if [[ "$AFFECTED_SERVICE" != "unknown" ]]; then
 CURRENT_REPLICAS=$(kubectl get deployment "$AFFECTED_SERVICE" -n telecommunications -o jsonpath='{.spec.replicas}')
 NEW_REPLICAS=$((CURRENT_REPLICAS * 2))
 kubectl scale deployment "$AFFECTED_SERVICE" --replicas="$NEW_REPLICAS" -n telecommunications
 log_action "Scaled up $AFFECTED_SERVICE from $CURRENT_REPLICAS to $NEW_REPLICAS replicas"
 fi
 fi  # Collect network metrics
 curl -s "http://prometheus.monitoring.svc.cluster.local:9090/api/v1/query_range?query=rate(container_network_receive_bytes_total[5m])&start=$(date -d '1 hour ago' +%s)&end=$(date +%s)&step=60" > "$INCIDENT_DIR/network-metrics.json"
 log_action "Collected network metrics for analysis"
 ;;  "security_vulnerability")
 log_action "Responding to security vulnerability"  if [[ "$SEVERITY" == "critical" ]]; then
 # Immediately isolate affected containers
 log_action "Isolating vulnerable containers"  # Apply network policy to isolate service
 cat << EOF | kubectl apply -f -
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
 name: $AFFECTED_SERVICE-quarantine
 namespace: telecommunications
spec:
 podSelector:
 matchLabels:
 app: $AFFECTED_SERVICE
 policyTypes:
 - Ingress
 - Egress
 ingress: []
 egress:
 - to: []
 ports:
 - protocol: UDP
 port: 53 # Allow DNS only
EOF
 log_action "Applied quarantine network policy for $AFFECTED_SERVICE"  # Mark deployment for urgent patching
 kubectl annotate deployment "$AFFECTED_SERVICE" -n telecommunications security.vulnerability/critical="$INCIDENT_ID"
 log_action "Marked $AFFECTED_SERVICE for urgent security patching"
 fi
 ;;  *)
 log_action "Unknown incident type: $INCIDENT_TYPE"
 # Generic containment measures
 log_action "Applying generic security measures"  # Enable enhanced monitoring across all services
 kubectl patch configmap security-config -n telecommunications -p '{"data":{"monitoring_level":"enhanced"}}'
 ;;
esac log_action "Incident response completed. Incident ID: $INCIDENT_ID" # Create incident report
cat << EOF > "$INCIDENT_DIR/incident-report.md"
# Security Incident Report **Incident ID:** $INCIDENT_ID
**Date/Time:** $(date -u -Iseconds)
**Type:** $INCIDENT_TYPE
**Severity:** $SEVERITY
**Affected Service:** $AFFECTED_SERVICE
**Source IP:** $SOURCE_IP ## Actions Taken
$(cat "$INCIDENT_DIR/incident.log" | grep -v "^$(date '+%Y-%m-%d')" | sed 's/^/- /') ## Next Steps
- [ ] Complete forensic analysis
- [ ] Update security policies based on findings
- [ ] Conduct post-incident review
- [ ] Update incident response procedures if needed ## Evidence Collected
- Service logs: service-logs.txt
- Kubernetes events: kubernetes-events.txt
- Network metrics: network-metrics.json
EOF echo "Incident report created: $INCIDENT_DIR/incident-report.md"

# Compliance policy definitions
apiVersion: v1
kind: ConfigMap
metadata:
 name: compliance-policies
 namespace: telecommunications
data:
 gdpr-policy.yaml: |
 # GDPR compliance requirements
 data_protection:
 encryption:
 at_rest: "AES-256"
 in_transit: "TLS 1.3"
 key_management: "HashiCorp Vault"  access_controls:
 authentication: "multi_factor"
 authorization: "rbac"
 audit_logging: "enabled"
 data_minimization: "enforced"  data_subject_rights:
 right_to_access: "automated_via_api"
 right_to_rectification: "automated_via_api" 
 right_to_erasure: "automated_via_api"
 right_to_portability: "automated_via_api"  breach_notification:
 detection_time: "< 1 hour"
 notification_time: "< 72 hours"
 authority_notification: "automated"  fcc-policy.yaml: |
 # FCC compliance requirements (US)
 network_reliability:
 uptime_requirement: "99.9%"
 outage_reporting: "automated"
 backup_power: "8_hours_minimum"
 network_monitoring: "24x7"  emergency_services:
 e911_availability: "99.99%"
 backup_routing: "enabled"
 location_accuracy: "required"
 test_procedures: "monthly"  cybersecurity:
 security_plan: "annual_update"
 risk_assessment: "annual"
 incident_reporting: "24_hours"
 supply_chain_security: "required"  nis2-policy.yaml: |
 # NIS2 Directive compliance (EU)
 cybersecurity_measures:
 risk_management: "comprehensive"
 incident_handling: "documented_procedures"
 business_continuity: "tested_annually"
 supply_chain_security: "enforced"
 vulnerability_management: "continuous"  incident_reporting:
 significant_incidents: "24_hours"
 early_warning: "immediate"
 incident_categories: "classified"  governance:
 board_oversight: "required"
 training_programs: "regular"
 audit_framework: "annual"

# Audit logging configuration
apiVersion: v1
kind: ConfigMap
metadata:
 name: audit-config
data:
 audit-policy.yaml: |
 apiVersion: audit.k8s.io/v1
 kind: Policy
 rules:
 # Log all security-relevant events
 - level: RequestResponse
 namespaces: ["telecommunications"]
 verbs: ["create", "update", "patch", "delete"]
 resources:
 - group: ""
 resources: ["secrets", "configmaps", "serviceaccounts"]
 - group: "rbac.authorization.k8s.io"
 resources: ["roles", "rolebindings", "clusterroles", "clusterrolebindings"]
 - group: "networking.k8s.io"
 resources: ["networkpolicies"]  # Log authentication and authorization events
 - level: Request
 users: ["system:anonymous"]
 verbs: ["*"]  # Log administrative actions
 - level: RequestResponse
 userGroups: ["system:masters", "telecom:admins"]
 verbs: ["*"]  # Log pod operations in production namespaces
 - level: Request
 namespaces: ["telecommunications"]
 verbs: ["create", "update", "patch", "delete"]
 resources:
 - group: ""
 resources: ["pods"]
 - group: "apps"
 resources: ["deployments", "replicasets", "statefulsets"]  # Exclude routine read operations to reduce log volume
 - level: None
 verbs: ["get", "list", "watch"]  application-audit.yaml: |
 # Application-level audit requirements
 audit_events:
 authentication:
 - login_success
 - login_failure
 - password_change
 - mfa_enrollment
 - session_timeout  authorization:
 - permission_granted
 - permission_denied
 - role_assignment
 - privilege_escalation  data_access:
 - subscriber_data_access
 - billing_data_access
 - configuration_change
 - backup_restore  system_events:
 - service_start_stop
 - configuration_change
 - software_update
 - certificate_renewal  audit_format:
 timestamp: "RFC3339"
 user_id: "required"
 source_ip: "required"
 action: "required"
 resource: "required"
 result: "required"
 additional_context: "optional"  retention_policy:
 audit_logs: "7_years"
 security_logs: "3_years"
 access_logs: "2_years"
 compliance_reports: "10_years"