egress control

Jan 1, 0001

Definition

Egress control refers to the policies and mechanisms that manage and restrict outbound network traffic from a system or network. It is a critical aspect of network security, ensuring that only authorized data can leave the network, thereby preventing data exfiltration and limiting the potential for malicious activities. Egress control is typically implemented using firewalls, proxies, and network security groups to enforce rules on outbound traffic.

Secure Settings Example

# Example of a secure egress control policy in Kubernetes NetworkPolicy
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-specific-egress
  namespace: default
spec:
  podSelector:
    matchLabels:
      role: frontend
  policyTypes:
  - Egress
  egress:
  - to:
    - ipBlock:
        cidr: 192.168.1.0/24
    ports:
    - protocol: TCP
      port: 443

Insecure Settings Example

# Example of an insecure egress control policy in Kubernetes NetworkPolicy
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-all-egress
  namespace: default
spec:
  podSelector:
    matchLabels:
      role: frontend
  policyTypes:
  - Egress
  egress:
  - {} # Allows all outbound traffic without restrictions