DigitalOcean Multi-Cloud Integration¶

Overview¶

Multi-cloud integration enables you to connect DigitalOcean resources with other cloud providers (AWS, Azure, GCP) and on-premises infrastructure. This creates hybrid and multi-cloud architectures for improved redundancy, disaster recovery, and workload distribution.

Key Features¶

VPN Connectivity: Site-to-site VPN tunnels
Hybrid Cloud: Connect cloud and on-premises
Multi-Cloud: Integrate multiple cloud providers
Private Connectivity: Secure encrypted tunnels
Flexible Routing: Custom routing between networks
Cost-Effective: Use existing infrastructure
High Availability: Redundant connections
Scalable: Grow across multiple clouds

Multi-Cloud Architecture Patterns¶

1. Hybrid Cloud Architecture¶

┌─────────────────────────────────────────────────────────────┐
│                    On-Premises Datacenter                    │
│                                                              │
│  ┌────────────────────────────────────────────────────────┐ │
│  │  Corporate Network (192.168.0.0/16)                    │ │
│  │                                                         │ │
│  │  ┌──────────┐  ┌──────────┐  ┌──────────┐            │ │
│  │  │ Active   │  │ Legacy   │  │ Internal │            │ │
│  │  │Directory │  │ Systems  │  │ Services │            │ │
│  │  └──────────┘  └──────────┘  └──────────┘            │ │
│  │                                                         │ │
│  │  ┌──────────────────────────────────────┐             │ │
│  │  │      VPN Gateway (pfSense)           │             │ │
│  │  │      Public IP: 198.51.100.10        │             │ │
│  │  └──────────────┬───────────────────────┘             │ │
│  └─────────────────┼─────────────────────────────────────┘ │
└────────────────────┼─────────────────────────────────────────┘
                     │
                     │ IPsec VPN Tunnel
                     │ (Encrypted)
                     │
┌────────────────────▼─────────────────────────────────────────┐
│              DigitalOcean Cloud (NYC3)                        │
│                                                              │
│  ┌────────────────────────────────────────────────────────┐ │
│  │  VPC: 10.10.0.0/16                                     │ │
│  │                                                         │ │
│  │  ┌──────────────────────────────────────┐             │ │
│  │  │  VPN Gateway Droplet                 │             │ │
│  │  │  Private IP: 10.10.1.5               │             │ │
│  │  │  Public IP: 203.0.113.10             │             │ │
│  │  └──────────────┬───────────────────────┘             │ │
│  │                 │                                       │ │
│  │  ┌──────────────┼───────────────────────────────────┐ │ │
│  │  │              │  Cloud Resources                   │ │ │
│  │  │  ┌───────────▼──────┐  ┌──────────────────────┐  │ │ │
│  │  │  │ Web Applications │  │ Cloud-Native Services│  │ │ │
│  │  │  └──────────────────┘  └──────────────────────┘  │ │ │
│  │  └──────────────────────────────────────────────────┘ │ │
│  └─────────────────────────────────────────────────────────┘ │
└─────────────────────────────────────────────────────────────┘

Traffic Flow:
On-Premises ←→ VPN Tunnel ←→ DigitalOcean
(192.168.0.0/16)           (10.10.0.0/16)

2. Multi-Cloud Architecture¶

┌─────────────────────────────────────────────────────────────┐
│                      AWS (us-east-1)                         │
│  VPC: 10.20.0.0/16                                          │
│  ┌──────────────┐  ┌──────────────┐  ┌──────────────┐     │
│  │   EC2        │  │   RDS        │  │   S3         │     │
│  │   Instances  │  │   Database   │  │   Storage    │     │
│  └──────────────┘  └──────────────┘  └──────────────┘     │
│         │                                                    │
│  ┌──────▼──────────────────────────┐                       │
│  │  VPN Gateway (AWS VGW)          │                       │
│  │  Public IP: 52.1.2.3            │                       │
│  └──────────────┬──────────────────┘                       │
└─────────────────┼──────────────────────────────────────────┘
                  │
                  │ VPN Tunnel 1
                  │
┌─────────────────▼──────────────────────────────────────────┐
│              DigitalOcean (NYC3)                            │
│  VPC: 10.10.0.0/16                                         │
│  ┌──────────────────────────────────────┐                 │
│  │  VPN Gateway Droplet (Hub)           │                 │
│  │  Public IP: 203.0.113.10             │                 │
│  └──────────────┬───────────────────────┘                 │
│                 │                                           │
│  ┌──────────────┼───────────────────────────────────────┐ │
│  │  ┌───────────▼──────┐  ┌──────────────────────┐     │ │
│  │  │ Load Balancers   │  │ Kubernetes Cluster   │     │ │
│  │  └──────────────────┘  └──────────────────────┘     │ │
│  └──────────────────────────────────────────────────────┘ │
└─────────────────┬──────────────────────────────────────────┘
                  │
                  │ VPN Tunnel 2
                  │
┌─────────────────▼──────────────────────────────────────────┐
│                   Google Cloud (us-central1)                │
│  VPC: 10.30.0.0/16                                         │
│  ┌──────────────┐  ┌──────────────┐  ┌──────────────┐    │
│  │   GCE        │  │   Cloud SQL  │  │   GCS        │    │
│  │   Instances  │  │   Database   │  │   Storage    │    │
│  └──────────────┘  └──────────────┘  └──────────────┘    │
│         │                                                   │
│  ┌──────▼──────────────────────────┐                      │
│  │  VPN Gateway (GCP)               │                      │
│  │  Public IP: 35.1.2.3             │                      │
│  └──────────────────────────────────┘                      │
└─────────────────────────────────────────────────────────────┘

DigitalOcean acts as hub connecting AWS and GCP

3. Disaster Recovery Architecture¶

┌─────────────────────────────────────────────────────────────┐
│              Primary Region: DigitalOcean NYC3               │
│                                                              │
│  ┌────────────────────────────────────────────────────────┐ │
│  │  Production Environment                                 │ │
│  │  ┌──────────┐  ┌──────────┐  ┌──────────┐            │ │
│  │  │   Web    │  │   App    │  │ Database │            │ │
│  │  │  Tier    │  │  Tier    │  │  Master  │            │ │
│  │  └──────────┘  └──────────┘  └────┬─────┘            │ │
│  │                                    │                    │ │
│  │                              Replication                │ │
│  └────────────────────────────────────┼──────────────────┘ │
└────────────────────────────────────────┼────────────────────┘
                                         │
                                    VPN Tunnel
                                         │
┌────────────────────────────────────────▼────────────────────┐
│              DR Region: AWS us-west-2                        │
│                                                              │
│  ┌────────────────────────────────────────────────────────┐ │
│  │  Disaster Recovery Environment                          │ │
│  │  ┌──────────┐  ┌──────────┐  ┌──────────┐            │ │
│  │  │   Web    │  │   App    │  │ Database │            │ │
│  │  │  Tier    │  │  Tier    │  │ Replica  │            │ │
│  │  │(Standby) │  │(Standby) │  │(Standby) │            │ │
│  │  └──────────┘  └──────────┘  └──────────┘            │ │
│  └────────────────────────────────────────────────────────┘ │
└─────────────────────────────────────────────────────────────┘

Failover: DNS update points to AWS in case of DigitalOcean outage

VPN Technologies¶

1. IPsec VPN¶

Most common for site-to-site connections

Features:
├─> Industry standard
├─> Strong encryption (AES-256)
├─> Authentication (PSK or certificates)
├─> Supported by all major vendors
└─> Good performance

Protocols:
├─> IKEv1 / IKEv2 (Key exchange)
├─> ESP (Encryption)
└─> AH (Authentication)

2. WireGuard VPN¶

Modern, lightweight VPN

Features:
├─> Simple configuration
├─> High performance
├─> Modern cryptography
├─> Small codebase
└─> Cross-platform

Benefits:
├─> Faster than IPsec
├─> Easier to configure
├─> Better for cloud-to-cloud
└─> Active development

3. OpenVPN¶

Flexible SSL/TLS VPN

Features:
├─> SSL/TLS based
├─> Highly configurable
├─> Works through NAT
├─> Cross-platform
└─> Open source

Use Cases:
├─> Remote access
├─> Site-to-site
├─> Complex routing
└─> Firewall traversal

Setting Up VPN Connections¶

IPsec VPN with StrongSwan¶

On DigitalOcean Droplet¶

# 1. Create VPN Gateway Droplet
doctl compute droplet create vpn-gateway \
  --region nyc3 \
  --size s-2vcpu-2gb \
  --image ubuntu-22-04-x64 \
  --vpc-uuid vpc-uuid

# 2. Install StrongSwan
sudo apt-get update
sudo apt-get install -y strongswan strongswan-pki

# 3. Configure IPsec (/etc/ipsec.conf)
cat << 'EOF' | sudo tee /etc/ipsec.conf
config setup
    charondebug="ike 2, knl 2, cfg 2"
    uniqueids=no

conn aws-to-digitalocean
    type=tunnel
    auto=start
    keyexchange=ikev2
    authby=secret
    left=%any
    leftid=203.0.113.10
    leftsubnet=10.10.0.0/16
    right=52.1.2.3
    rightid=52.1.2.3
    rightsubnet=10.20.0.0/16
    ike=aes256-sha2_256-modp2048!
    esp=aes256-sha2_256!
    keyingtries=%forever
    dpdaction=restart
    dpddelay=30s
    dpdtimeout=120s
EOF

# 4. Configure Pre-Shared Key (/etc/ipsec.secrets)
cat << 'EOF' | sudo tee /etc/ipsec.secrets
203.0.113.10 52.1.2.3 : PSK "your-very-strong-pre-shared-key-here"
EOF

sudo chmod 600 /etc/ipsec.secrets

# 5. Enable IP forwarding
sudo sysctl -w net.ipv4.ip_forward=1
echo "net.ipv4.ip_forward=1" | sudo tee -a /etc/sysctl.conf

# 6. Configure firewall
sudo ufw allow 500/udp
sudo ufw allow 4500/udp
sudo ufw allow from 10.20.0.0/16 to 10.10.0.0/16

# 7. Start StrongSwan
sudo systemctl enable strongswan-starter
sudo systemctl start strongswan-starter

# 8. Verify connection
sudo ipsec status
sudo ipsec statusall

WireGuard VPN¶

On DigitalOcean Droplet¶

# 1. Install WireGuard
sudo apt-get update
sudo apt-get install -y wireguard

# 2. Generate keys
wg genkey | sudo tee /etc/wireguard/private.key
sudo chmod 600 /etc/wireguard/private.key
sudo cat /etc/wireguard/private.key | wg pubkey | sudo tee /etc/wireguard/public.key

# 3. Configure WireGuard (/etc/wireguard/wg0.conf)
cat << 'EOF' | sudo tee /etc/wireguard/wg0.conf
[Interface]
PrivateKey = <PRIVATE_KEY_FROM_STEP_2>
Address = 10.100.0.1/24
ListenPort = 51820
PostUp = iptables -A FORWARD -i wg0 -j ACCEPT; iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE

[Peer]
# AWS VPN Gateway
PublicKey = <AWS_PUBLIC_KEY>
AllowedIPs = 10.20.0.0/16
Endpoint = 52.1.2.3:51820
PersistentKeepalive = 25
EOF

# 4. Enable IP forwarding
sudo sysctl -w net.ipv4.ip_forward=1
echo "net.ipv4.ip_forward=1" | sudo tee -a /etc/sysctl.conf

# 5. Start WireGuard
sudo systemctl enable wg-quick@wg0
sudo systemctl start wg-quick@wg0

# 6. Verify connection
sudo wg show

OpenVPN¶

On DigitalOcean Droplet¶

# 1. Install OpenVPN
sudo apt-get update
sudo apt-get install -y openvpn easy-rsa

# 2. Set up PKI
make-cadir ~/openvpn-ca
cd ~/openvpn-ca

# 3. Configure vars
cat << 'EOF' >> vars
export KEY_COUNTRY="US"
export KEY_PROVINCE="NY"
export KEY_CITY="NewYork"
export KEY_ORG="MyOrganization"
export KEY_EMAIL="admin@example.com"
export KEY_OU="IT"
EOF

# 4. Build CA and server certificates
source vars
./clean-all
./build-ca
./build-key-server server
./build-dh
openvpn --genkey --secret keys/ta.key

# 5. Configure OpenVPN server (/etc/openvpn/server.conf)
cat << 'EOF' | sudo tee /etc/openvpn/server.conf
port 1194
proto udp
dev tun
ca ca.crt
cert server.crt
key server.key
dh dh2048.pem
tls-auth ta.key 0
server 10.100.0.0 255.255.255.0
push "route 10.10.0.0 255.255.0.0"
keepalive 10 120
cipher AES-256-CBC
user nobody
group nogroup
persist-key
persist-tun
status openvpn-status.log
verb 3
EOF

# 6. Copy certificates
sudo cp ~/openvpn-ca/keys/{ca.crt,server.crt,server.key,ta.key,dh2048.pem} /etc/openvpn/

# 7. Start OpenVPN
sudo systemctl enable openvpn@server
sudo systemctl start openvpn@server

Cloud Provider Integration¶

AWS Integration¶

AWS VPN Gateway Setup¶

# 1. Create Virtual Private Gateway in AWS
aws ec2 create-vpn-gateway \
  --type ipsec.1 \
  --amazon-side-asn 65000

# 2. Attach to VPC
aws ec2 attach-vpn-gateway \
  --vpn-gateway-id vgw-xxxxx \
  --vpc-id vpc-xxxxx

# 3. Create Customer Gateway (DigitalOcean side)
aws ec2 create-customer-gateway \
  --type ipsec.1 \
  --public-ip 203.0.113.10 \
  --bgp-asn 65001

# 4. Create VPN Connection
aws ec2 create-vpn-connection \
  --type ipsec.1 \
  --customer-gateway-id cgw-xxxxx \
  --vpn-gateway-id vgw-xxxxx \
  --options TunnelOptions='[{TunnelInsideCidr=169.254.10.0/30,PreSharedKey=your-psk}]'

# 5. Download configuration
aws ec2 describe-vpn-connections \
  --vpn-connection-ids vpn-xxxxx \
  --query 'VpnConnections[0].CustomerGatewayConfiguration' \
  --output text > aws-vpn-config.xml

# 6. Update route tables
aws ec2 create-route \
  --route-table-id rtb-xxxxx \
  --destination-cidr-block 10.10.0.0/16 \
  --gateway-id vgw-xxxxx

AWS Direct Connect (Alternative)¶

For high-bandwidth, low-latency connections:

1. Order Direct Connect circuit
2. Create Virtual Interface
3. Configure BGP
4. Connect to DigitalOcean via colocation

Benefits:
├─> Dedicated bandwidth
├─> Lower latency
├─> More consistent performance
└─> Better for large data transfers

Azure Integration¶

Azure VPN Gateway Setup¶

# 1. Create Virtual Network Gateway
az network vnet-gateway create \
  --name azure-vpn-gateway \
  --resource-group myResourceGroup \
  --location eastus \
  --vnet myVNet \
  --gateway-type Vpn \
  --vpn-type RouteBased \
  --sku VpnGw1

# 2. Create Local Network Gateway (DigitalOcean side)
az network local-gateway create \
  --name digitalocean-gateway \
  --resource-group myResourceGroup \
  --gateway-ip-address 203.0.113.10 \
  --local-address-prefixes 10.10.0.0/16

# 3. Create VPN Connection
az network vpn-connection create \
  --name azure-to-digitalocean \
  --resource-group myResourceGroup \
  --vnet-gateway1 azure-vpn-gateway \
  --local-gateway2 digitalocean-gateway \
  --shared-key your-pre-shared-key \
  --location eastus

# 4. Verify connection
az network vpn-connection show \
  --name azure-to-digitalocean \
  --resource-group myResourceGroup

Google Cloud Integration¶

GCP VPN Gateway Setup¶

# 1. Create VPN Gateway
gcloud compute target-vpn-gateways create gcp-vpn-gateway \
  --network=default \
  --region=us-central1

# 2. Reserve static IP
gcloud compute addresses create gcp-vpn-ip \
  --region=us-central1

# 3. Create forwarding rules
gcloud compute forwarding-rules create gcp-vpn-rule-esp \
  --region=us-central1 \
  --address=gcp-vpn-ip \
  --ip-protocol=ESP \
  --target-vpn-gateway=gcp-vpn-gateway

gcloud compute forwarding-rules create gcp-vpn-rule-udp500 \
  --region=us-central1 \
  --address=gcp-vpn-ip \
  --ip-protocol=UDP \
  --ports=500 \
  --target-vpn-gateway=gcp-vpn-gateway

gcloud compute forwarding-rules create gcp-vpn-rule-udp4500 \
  --region=us-central1 \
  --address=gcp-vpn-ip \
  --ip-protocol=UDP \
  --ports=4500 \
  --target-vpn-gateway=gcp-vpn-gateway

# 4. Create VPN tunnel
gcloud compute vpn-tunnels create gcp-to-digitalocean \
  --region=us-central1 \
  --peer-address=203.0.113.10 \
  --shared-secret=your-pre-shared-key \
  --ike-version=2 \
  --local-traffic-selector=0.0.0.0/0 \
  --remote-traffic-selector=0.0.0.0/0 \
  --target-vpn-gateway=gcp-vpn-gateway

# 5. Create route
gcloud compute routes create route-to-digitalocean \
  --network=default \
  --next-hop-vpn-tunnel=gcp-to-digitalocean \
  --next-hop-vpn-tunnel-region=us-central1 \
  --destination-range=10.10.0.0/16

Routing Configuration¶

Static Routing¶

# On DigitalOcean VPN Gateway

# Route to AWS network
sudo ip route add 10.20.0.0/16 via 169.254.10.1 dev tun0

# Route to GCP network
sudo ip route add 10.30.0.0/16 via 169.254.20.1 dev tun1

# Make persistent
cat << 'EOF' | sudo tee -a /etc/network/interfaces
up ip route add 10.20.0.0/16 via 169.254.10.1 dev tun0
up ip route add 10.30.0.0/16 via 169.254.20.1 dev tun1
EOF

Dynamic Routing (BGP)¶

# Install FRRouting
sudo apt-get install -y frr

# Configure BGP (/etc/frr/frr.conf)
cat << 'EOF' | sudo tee /etc/frr/frr.conf
router bgp 65001
 bgp router-id 203.0.113.10
 neighbor 169.254.10.1 remote-as 65000
 neighbor 169.254.20.1 remote-as 65002
 !
 address-family ipv4 unicast
  network 10.10.0.0/16
  neighbor 169.254.10.1 activate
  neighbor 169.254.20.1 activate
 exit-address-family
!
EOF

# Enable BGP daemon
sudo sed -i 's/bgpd=no/bgpd=yes/' /etc/frr/daemons

# Restart FRRouting
sudo systemctl restart frr

# Verify BGP
sudo vtysh -c "show ip bgp summary"

High Availability VPN¶

Redundant VPN Gateways¶

┌─────────────────────────────────────────────────────────────┐
│              DigitalOcean VPC (10.10.0.0/16)                 │
│                                                              │
│  ┌──────────────────┐         ┌──────────────────┐         │
│  │ VPN Gateway 1    │         │ VPN Gateway 2    │         │
│  │ (Primary)        │         │ (Backup)         │         │
│  │ 203.0.113.10     │         │ 203.0.113.20     │         │
│  └────────┬─────────┘         └────────┬─────────┘         │
│           │                            │                    │
│           │ Tunnel 1 (Active)          │ Tunnel 2 (Standby)│
└───────────┼────────────────────────────┼────────────────────┘
            │                            │
            │                            │
┌───────────▼────────────────────────────▼────────────────────┐
│                    AWS VPC (10.20.0.0/16)                    │
│                                                              │
│  ┌──────────────────────────────────────────────────────┐   │
│  │           AWS VPN Gateway (Dual Tunnel)              │   │
│  └──────────────────────────────────────────────────────┘   │
└─────────────────────────────────────────────────────────────┘

Failover: If Tunnel 1 fails, traffic automatically uses Tunnel 2

Monitoring and Troubleshooting¶

Monitor VPN Status¶

# IPsec/StrongSwan
sudo ipsec status
sudo ipsec statusall
sudo journalctl -u strongswan-starter -f

# WireGuard
sudo wg show
sudo wg show wg0 transfer
sudo journalctl -u wg-quick@wg0 -f

# OpenVPN
sudo systemctl status openvpn@server
sudo cat /var/log/openvpn/openvpn-status.log
sudo journalctl -u openvpn@server -f

Test Connectivity¶

# Ping remote network
ping 10.20.0.5

# Traceroute
traceroute 10.20.0.5

# Test specific port
nc -zv 10.20.0.5 22

# Check routing
ip route show
ip route get 10.20.0.5

Common Issues¶

VPN Tunnel Not Establishing¶

# Check firewall rules
sudo ufw status
sudo iptables -L -n

# Verify PSK matches on both sides
sudo cat /etc/ipsec.secrets

# Check IKE/ESP proposals match
sudo ipsec statusall

# Review logs
sudo journalctl -u strongswan-starter -n 100

Traffic Not Flowing¶

# Verify IP forwarding enabled
sysctl net.ipv4.ip_forward

# Check NAT rules
sudo iptables -t nat -L -n

# Verify routes
ip route show

# Test from VPN gateway
ping -I 10.10.1.5 10.20.0.5

Security Best Practices¶

1. Strong Encryption¶

Use modern encryption:
├─> IKEv2 (not IKEv1)
├─> AES-256-GCM or AES-256-CBC
├─> SHA-256 or SHA-384
└─> DH Group 14 or higher

2. Authentication¶

Prefer certificates over PSK:
├─> Generate unique certificates
├─> Use strong key sizes (2048-bit minimum)
├─> Implement certificate rotation
└─> Secure private key storage

3. Network Segmentation¶

Limit VPN access:
├─> Only route necessary subnets
├─> Use firewall rules to restrict traffic
├─> Implement least privilege
└─> Monitor cross-cloud traffic

4. Monitoring¶

Implement comprehensive monitoring:
├─> VPN tunnel status
├─> Bandwidth usage
├─> Connection attempts
├─> Failed authentications
└─> Unusual traffic patterns

Use Cases¶

1. Database Replication¶

Primary DB (DigitalOcean) ←VPN→ Replica DB (AWS)
- Real-time replication
- Disaster recovery
- Read scaling

2. Hybrid Authentication¶

Cloud Apps (DigitalOcean) ←VPN→ Active Directory (On-Premises)
- Centralized authentication
- Legacy system integration
- Compliance requirements

3. Data Processing Pipeline¶

Data Collection (DigitalOcean) ←VPN→ Analytics (GCP)
- Distributed processing
- Cost optimization
- Specialized services

4. Multi-Region Deployment¶

Primary (DigitalOcean NYC) ←VPN→ DR (AWS Oregon)
- Geographic redundancy
- Disaster recovery
- Compliance (data residency)

Cost Considerations¶

DigitalOcean Costs¶

VPN Gateway Droplet: $12-48/month
Bandwidth: Free outbound (within limits)
Reserved IP: Free when assigned

AWS Costs¶

VPN Connection: $0.05/hour (~$36/month)
Data Transfer: $0.09/GB outbound

Azure Costs¶

VPN Gateway: $27-650/month (depending on SKU)
Data Transfer: $0.087/GB outbound

GCP Costs¶

VPN Tunnel: $0.05/hour (~$36/month)
Data Transfer: $0.12/GB outbound

Best Practices¶

Plan IP Addressing: Avoid overlapping CIDR blocks
Use Redundancy: Multiple VPN tunnels for HA
Monitor Performance: Track latency and bandwidth
Document Configuration: Maintain runbooks
Test Failover: Regular DR drills
Secure Credentials: Rotate PSKs and certificates
Optimize Routing: Use BGP for dynamic routing
Implement QoS: Prioritize critical traffic

VPC - Private networks for resources
Cloud Firewalls - Secure VPN gateways
Reserved IPs - Static IPs for VPN endpoints
Load Balancers - Distribute traffic across clouds

DigitalOcean Multi-Cloud Integration¶

Overview¶

Key Features¶

Multi-Cloud Architecture Patterns¶

1. Hybrid Cloud Architecture¶

2. Multi-Cloud Architecture¶

3. Disaster Recovery Architecture¶

VPN Technologies¶

1. IPsec VPN¶

2. WireGuard VPN¶

3. OpenVPN¶

Setting Up VPN Connections¶

IPsec VPN with StrongSwan¶

On DigitalOcean Droplet¶

WireGuard VPN¶

On DigitalOcean Droplet¶

OpenVPN¶

On DigitalOcean Droplet¶

Cloud Provider Integration¶

AWS Integration¶

AWS VPN Gateway Setup¶

AWS Direct Connect (Alternative)¶

Azure Integration¶

Azure VPN Gateway Setup¶

Google Cloud Integration¶

GCP VPN Gateway Setup¶

Routing Configuration¶

Static Routing¶

Dynamic Routing (BGP)¶

High Availability VPN¶

Redundant VPN Gateways¶

Monitoring and Troubleshooting¶

Monitor VPN Status¶

Test Connectivity¶

Common Issues¶

VPN Tunnel Not Establishing¶

Traffic Not Flowing¶

Security Best Practices¶

1. Strong Encryption¶

2. Authentication¶

3. Network Segmentation¶

4. Monitoring¶

Use Cases¶

1. Database Replication¶

2. Hybrid Authentication¶

3. Data Processing Pipeline¶

4. Multi-Region Deployment¶

Cost Considerations¶

DigitalOcean Costs¶

AWS Costs¶

Azure Costs¶

GCP Costs¶

Best Practices¶

Related Services¶