Use third-party VPNs

This page provides Google-tested interoperability guides and vendor-specific notes for peer third-party VPN devices or services that you can use to connect to Cloud VPN.

Each Interop guide offers specific instructions for connecting the third-party VPN solution to Cloud VPN. If the third-party solution supports dynamic (BGP) routing, the guide includes configuration instructions for Cloud Router.

Most peer VPN devices should be compatible with Cloud VPN. For general information about configuring peer VPN devices, see Configure the peer VPN gateway.

Any third-party device or service that supports IPsec and IKE versions 1 or 2 should be compatible with Cloud VPN. For a list of IKE ciphers and other configuration parameters used by Cloud VPN, see Supported IKE ciphers.

IPv6 is supported only in HA VPN configurations. IPv6 is not supported by Classic VPN. HA VPN support for IPv6 is in Preview.

For more information about Cloud VPN, see the Cloud VPN overview.

For definitions of terms used on this page, see Key terms.

Interop guides by vendor

This section lists interoperability guides by vendor. Each guide covers how to use that vendor's VPN gateway solution with Cloud VPN.

For detailed notes covering the vendors listed in this section, see the vendor-specific notes section.

A-L

Guide Notes
Alibaba Cloud VPN Gateway without redundancy Supports static routes only.
Alibaba Cloud VPN Gateway with redundancy Supports static routes only.
Amazon Web Services with HA VPN

Supports dynamic routing with Cloud Router only.

Known issue: When setting up VPN tunnels to AWS, using IKEv2 and setting up fewer IKE transform sets on the AWS side is required.
Amazon Web Services with Classic VPN Supports static routes or dynamic routing with Cloud Router.
Cisco ASA 5506H with HA VPN Supports dynamic routing with Cloud Router only.
Cisco ASA 5505 with Classic VPN Supports static routes only.
Cisco ASR Supports static routes or dynamic routing with Cloud Router.
Check Point security gateway Supports static routes or dynamic routing with Cloud Router.
Fortinet FortiGate with HA VPN Supports dynamic routing with Cloud Router only.
Fortinet FortiGate 300C with Classic VPN Supports static routes or dynamic routing with Cloud Router.
Juniper SRX Supports static routes or dynamic routing with Cloud Router.

M-Z

Guide Notes
Microsoft Azure Supports static routes only.
Palo Alto Networks PA-3020 Supports static routes or dynamic routing with Cloud Router.
strongSwan Supports dynamic routing with Cloud Router and BIRD.

Vendor-specific notes

Check Point

Check Point VPN implements IKEv2 by creating multiple Child Security Associations (SAs) when you specify more than one CIDR per traffic selector. This implementation is incompatible with Cloud VPN, which requires all CIDRs for the local traffic selector and all CIDRs for the remote traffic selector to be located in a single Child SA. For suggestions about how to create a compatible configuration, see Traffic selector strategies.

Cisco

If your VPN gateway runs Cisco IOS XE, make sure that you're running version 16.6.3 (Everest) or later. Earlier versions have known problems with Phase 2 rekey events, which result in tunnels going down for a few minutes every few hours.

Cisco ASA supports route-based VPN with Virtual Tunnel Interface (VTI) in IOS version 9.7(x) and later. For more information, see the following:

When using Cisco ASA devices with a Cloud VPN tunnel, you cannot configure more than one IP address range (CIDR block) for each of the local and remote traffic selectors. The reason is that Cisco ASA devices use a unique SA for each IP address range in a traffic selector, while Cloud VPN uses a single SA for all IP ranges in a traffic selector. For more information, see Policy-based tunnels and traffic selectors.

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