Hybrid Cloud Networking

Configure secure, high-performance connectivity between on-premises and cloud environments using VPN, Direct Connect, ExpressRoute, Interconnect, and FastConnect.

Purpose

Establish secure, reliable network connectivity between on-premises data centers and cloud providers (AWS, Azure, GCP, OCI).

When to Use

• Connect on-premises to cloud
• Extend datacenter to cloud
• Implement hybrid active-active setups
• Meet compliance requirements
• Migrate to cloud gradually

Connection Options

AWS Connectivity

1. Site-to-Site VPN

• IPSec VPN over internet
• Up to 1.25 Gbps per tunnel
• Cost-effective for moderate bandwidth
• Higher latency, internet-dependent

resource "aws_vpn_gateway" "main" {
  vpc_id = aws_vpc.main.id
  tags = {
    Name = "main-vpn-gateway"
  }
}

resource "aws_customer_gateway" "main" {
  bgp_asn    = 65000
  ip_address = "203.0.113.1"
  type       = "ipsec.1"
}

resource "aws_vpn_connection" "main" {
  vpn_gateway_id      = aws_vpn_gateway.main.id
  customer_gateway_id = aws_customer_gateway.main.id
  type                = "ipsec.1"
  static_routes_only  = false
}

2. AWS Direct Connect

• Dedicated network connection
• 1 Gbps to 100 Gbps
• Lower latency, consistent bandwidth
• More expensive, setup time required

Reference: See references/direct-connect.md

Azure Connectivity

1. Site-to-Site VPN

resource "azurerm_virtual_network_gateway" "vpn" {
  name                = "vpn-gateway"
  location            = azurerm_resource_group.main.location
  resource_group_name = azurerm_resource_group.main.name

  type     = "Vpn"
  vpn_type = "RouteBased"
  sku      = "VpnGw1"

  ip_configuration {
    name                          = "vnetGatewayConfig"
    public_ip_address_id          = azurerm_public_ip.vpn.id
    private_ip_address_allocation = "Dynamic"
    subnet_id                     = azurerm_subnet.gateway.id
  }
}

2. Azure ExpressRoute

• Private connection via connectivity provider
• Up to 100 Gbps
• Low latency, high reliability
• Premium for global connectivity

GCP Connectivity

1. Cloud VPN

• IPSec VPN (Classic or HA VPN)
• HA VPN: 99.99% SLA
• Up to 3 Gbps per tunnel

2. Cloud Interconnect