3

Cloud VPN only supports one-to-one NAT via UDP encapsulation for NAT-Traversal (NAT-T). One-to-many NAT and port-based address translation are not supported. In other words, Cloud VPN cannot connect to multiple peer VPN gateways that share a single external IP address.Details can be found UDP encapsulation When using one-to-one NAT, your on-premises VPN ...


3

As per the official documentation1: You cannot access a Cloud SQL instance on its private IP addresses from another network using a Cloud VPN tunnel, instance based VPN, or Cloud Interconnect. This limit applies to both on-premises networks and other VPC networks. There is a feature request to get this implemented2. My suggestion is to use Cloud SQL Proxy3,...


2

Using static route and IKEv1 posed significant restrictions but that was what the 3rd party peer would support. The most significant being I could not use multi-cidr blocks and was limited to aes-128 for encryption. After looking up some of the errors in the log, including INVALID_ID_INFORMATION, I found references that suggested the encryption on the ASA ...


2

To answer your main question, you can’t restart a Cloud VPN. The information about what can be done when the Cloud VPN is up and running in this link There is no way to force a renegotiation since this is done automatically by GCP end and it will continue to retry until it's successful. However, the first thing we need understand is why the VPN is not ...


2

There is a hard limit of Cloud Routers per VPC/Region and is 5. It is not possible to increase this limit If you are planning to choose another region to deploy your Cloud Router the considerations depends your use case, it’s recommended to choose a region and zone closer to your point of service in order to decrease the latency, also I kindly suggest to ...


2

Got the same error when trying to connect two GCP VPC via HA VPN Tunnels and the cause was that I was not providing the same shared key in the wizard. When creating the tunnels, the wizard suggests a shared secret and, instead of adding the same one in both, I got the same error as you. Providing a consistent secret made the error dissapear.


1

Currently that feature is not available, however there is a feature request already created. I share you the link to the public issue tracker. I suggest to star it and comment it so google can know that there are more customers requesting this feature.


1

As per the logs you shared, It looks like Cloud VPN has accepted 1 proposal. To locate the issue, you can follow the below steps: Check for logs if the VPN has the warning 'The peer gateway notifies: Proposal mismatch in CHILD SA (phase 2)’. If you are getting this warning,then the next step would be to check the peer logs with keywords 'NO_PROPOSAL_CHOSEN'...


1

This very likely indicates that the Traffic Selectors are configured differently on two sides. Please unify the TS configuration for GCP VPN tunnel and on-prem and re-create the tunnel if necessary.


1

As you correctly stated there is not a way to limit incoming traffic on a Internal Load Balancer. Cloud Armor sound a good option, but as it mentioned here is not yet available for the Internal LB 1. Although it looks an overkill, having an instance in front of the Load Balancer, may be the fastest and easier solution. Another alternative similar to what you ...


1

Unfortunately it's not possible to use Cloud VPN to connect to external IP of your VM instance. Have a look at the documentation Cloud VPN: Cloud VPN securely connects your peer network to your Virtual Private Cloud (VPC) network through an IPsec VPN connection.Traffic traveling between the two networks is encrypted by one VPN gateway, and then decrypted by ...


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