Azure - GCP - connection via Openvpn

0
votes

I need to create connection between GCP and Azure cloud. There in Open vpn connection created between GCP and Azure cloud, OpenVPN azure IP is 10.5.1.5.

In Azure I have core vnetA and satelite vnetB. Between vnetA and vnetB I have peering configured, gateway transit is enabled on both sides of peered vnets.

I have two route tables: RTableA, RTableB.

RTableA is associated with subnetA in vnetA, RTableB is associated with subnetB in vnetB.

In RTableA I have routes

  • 1.(Name GCPtraffic;addr.prefix 192.168.0.0/24;virtual appliance/openvpn IP 10.5.1.5),
  • 2.(Name InternetGateway;addr.prefix 0.0.0.0/0; Internet),
  • 3.(Name Local; addr.prefix 10.5.1.0/24; Virtual Network).

In RTableB I have only one route 1.(Name GCPtraffic;addr.prefix 192.168.0.0/24;virtual appliance/openvpn IP 10.5.1.5).

I have VMs: VmA located in subnetA, VmB located in subnetB.

I have connection both directions VmA --> VmB, VmB --> VmA, and I can connect VmA --> GCP network.

Problem is that I am not able to connect VmB --> GCP network. Is there any route missing in that scenario?

1
azureopenvpnazure-vpnvnet

1 Answers

0
votes

It seems that you are using a pure OpenVPN software for the VPN connection but the vNetB don't use a remote gateway.

If you could use Azure virtual network gateway, in hub-and-spoke network architecture, gateway transit allows spoke virtual networks(vNetB) to share the VPN gateway in the hub networks(vNetA). If the peering is already created, navigate to the peering resource, then enable the Use remote gateways option for peered vNetB. Read Configure VPN gateway transit for virtual network peering for more details.

For more information, you could create a Site to Site VPN Connection Between GCP and Azure with Google Private Access from this blog.