Azure Multicloud Transit Hub Module
Connect Azure workloads to AWS and Google Cloud without hand-built point-to-point tunnels. Routes propagate over BGP, traffic between clouds passes one central firewall, and route filters keep the hub from carrying anything you did not approve.
- Fixed fee
- $30,000
- Delivery
- 1–2 weeks
- Clouds
- Azure, AWS, Google Cloud
- Before we start
- Setup review or a tier
How traffic moves between clouds
Active-active BGP peering through one interconnect, with every cross-cloud flow inspected by the same firewall in both directions.
or Azure Route Server"] AzFW["Azure Firewall Premium
(central inspection)"] AzSpoke["Workload spokes
(App Service, AKS, SQL MI)"] vWAN --- AzFW AzFW --- AzSpoke end subgraph TransitLayer["Interconnect"] Equinix["Equinix Fabric, Megaport,
or active-active IPsec with BGP"] end subgraph AWSCloud["Amazon Web Services"] AWSTGW["AWS Transit Gateway
(ASN 64512)"] AWSVPC["Production VPCs
(EC2, EKS, RDS)"] AWSTGW --- AWSVPC end subgraph GCPCloud["Google Cloud"] GCPRouter["Cloud Router and Interconnect
(ASN 64513)"] GCPVPC["Compute Engine and BigQuery"] GCPRouter --- GCPVPC end vWAN <-->|"BGP (ASN 65515)"| Equinix Equinix <-->|"BGP peering"| AWSTGW Equinix <-->|"BGP peering"| GCPRouter
Why point-to-point tunnels break down
Teams that run analytics on Azure and product services on AWS usually start by building VPN tunnels between individual networks by hand. Each new tunnel adds static routes that someone has to remember.
The result is asymmetric routing that stateful firewalls drop, overlapping private address ranges that cannot talk to each other, and route tables that only one person can debug when a route flaps. A transit hub replaces those tunnels with one routed backbone that propagates routes over BGP and inspects traffic in one place.
What it covers
Design, routing configuration, failover testing, and runbooks, delivered into your repository.
-
BGP routing
Dynamic route propagation across cloud borders, replacing manual user-defined routes.
- Virtual WAN or Route Server peering, ASN assignment, and route preference tuning
- AS-path prepending to keep traffic off unintended paths
- Failover and failback tested by simulating a link outage
-
Central firewall inspection
Symmetric route tables that send all traffic between clouds through one firewall, so stateful sessions are not dropped.
- Azure Firewall Premium or a network virtual appliance in the transit path
- Intrusion detection and prevention on cross-cloud traffic
- Segmentation rules that keep test and staging networks away from production data
-
Overlapping address ranges
Private NAT and Private Link to connect networks whose address spaces collide, for example two copies of 10.0.0.0/16.
- Private Link Service to expose Azure endpoints into AWS VPCs
- Virtual WAN private NAT rules for overlapping subnets
- No renumbering of existing VPCs
-
Cross-cloud DNS
Split-horizon resolution so services in AWS Route 53 and Azure Private DNS zones can find each other.
- Azure DNS Private Resolver inbound and outbound endpoints
- Route 53 Resolver forwarding rules for your private domains
- Forwarding designed to avoid circular queries
-
Route leak protection
Route filters that stop the hub from carrying traffic for networks you have not approved.
- Advertised prefixes limited to approved private ranges
- No default internet route (0.0.0.0/0) injected across clouds
- Alerts on unexpected route advertisements and BGP session drops
-
Egress cost design
A topology that keeps cross-cloud data transfer charges in view and under control.
- Private port sizing on Equinix Fabric or Megaport instead of internet egress
- Flow logs showing cross-cloud transfer volume per service
- Caching and batch synchronization patterns for high-volume pipelines
-
Runbooks and code
Day-2 runbooks with diagnostic scripts, and the full repository transferred to you.
What you provide
Network admin access
Network Contributor in Azure and the equivalent transit permissions in AWS and Google Cloud.
Private ASNs
The BGP ASN ranges you want used for each cloud.
A network lead
One network engineer to approve advertised prefixes and join route testing.
Questions
Do we need third-party router licenses?
No. The baseline design uses the clouds' own transit services, Azure Virtual WAN, AWS Transit Gateway, and Google Cloud Router, with standard BGP. No third-party networking software licenses are needed.
How do you handle overlapping IP ranges between Azure and AWS?
With Private Link Service and Virtual WAN private NAT rules, which map conflicting subnets to each other without renumbering existing production VPCs.
Is traffic encrypted between clouds?
Yes. Links between clouds use IPsec tunnels with AES-256-GCM, or MACsec on dedicated Equinix Fabric or Megaport circuits.
Can our platform team run this without specialist network engineers?
Yes. BGP propagates routes when new spokes or VPCs are added, so routine growth does not need hand-edited route tables. The handoff includes day-2 runbooks and diagnostic scripts.
Do we need one of the tiers first?
Not necessarily. We start by reviewing your current Azure setup. If it already has a hub network and firewall the transit can connect into, we build on it. If it does not, we build that foundation with you through Tier 3: Platform Transit Hub first.
Related
- Tier 3: Platform Transit Hub
The Azure hub network, firewall, Bastion, and central logging this module extends to other clouds.
- The idle cost of an Azure landing zone
Why network appliances bill by the hour, and how to sequence them so they arrive when traffic does.
- Azure SQL Database Migration Module
Moving SQL Server databases into Azure behind private endpoints.
Replace hand-built tunnels with one routed backbone.
$30,000 fixed fee, 1 to 2 weeks. Not sure which foundation it should connect to? Answer three questions.