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Cloud CNI privately connects your clouds to Cloudflare


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Cloud CNI privately connects your clouds to Cloudflare

For CIOs, networking is a hard process that is often made harder. Corporate networks have so many things that need to be connected and each one of them needs to be connected differently: user devices need managed connectivity through a Secure Web Gateway, offices need to be connected using the public Internet or dedicated connectivity, data centers need to be managed with their own private or public connectivity, and then you have to manage cloud connectivity on top of it all! It can be exasperating to manage connectivity for all these different scenarios and all their privacy and compliance requirements when all you want to do is enable your users to access their resources privately, securely, and in a non-intrusive manner.

Cloudflare helps simplify your connectivity story with Cloudflare One. Today, we’re excited to announce that we support direct cloud interconnection with our Cloudflare Network Interconnect, allowing Cloudflare to be your one-stop shop for all your interconnection needs.

Customers using IBM Cloud, Google Cloud, Azure, Oracle Cloud Infrastructure, and Amazon Web Services can now open direct connections from their private cloud instances into Cloudflare. In this blog, we’re going to talk about why direct cloud interconnection is important, how Cloudflare makes it easy, and how Cloudflare integrates direct cloud connection with our existing Cloudflare One products to bring new levels of security to your corporate networks built on top of Cloudflare.

Privacy in a public cloud

Public cloud compute providers are built on the idea that the compute power they provide can be used by anyone: your cloud VM and my cloud VM can run next to each other on the same machine and neither of us will know. The same is true for bits on the wire going in and out of these clouds: your bits and my bits may flow on the same wire, interleaved with each other, and neither of us will know that it’s happening.

The abstraction and relinquishment of ownership is comforting in one way but can be terrifying in another: neither of us need to run a physical machine and buy our own connectivity, but we have no guarantees about how or where our data and compute lives except that it lives in a datacenter with millions of other users.

For many enterprises, this isn’t acceptable: enterprises need compute that can only be accessed by them. Maybe the compute in the cloud is storing payment data that can’t be publicly accessible, and must be accessed through a private connection. Maybe the cloud customer has compliance requirements due to government restrictions that require the cloud not be accessible to the public Internet. Maybe the customer simply doesn’t trust public clouds or the public Internet and wants to limit exposure as much as possible. Customers want a private cloud that only they can access: a virtual private cloud, or a VPC.

To help solve this problem and ensure that only compute owners can access cloud compute that needs to stay private, clouds developed private cloud interconnects: direct cables from clouds to their customers. You may know them by their product names: AWS calls theirs DirectConnect, Azure calls theirs ExpressRoute, Google Cloud calls theirs Cloud Interconnect, OCI calls theirs FastConnect, and IBM calls theirs Direct Link. By providing private cloud connectivity to the customer datacenter, clouds satisfy the chief pain points for their customers: providing compute in a private manner. With these private links, VPCs are only accessible from the corporate networks that they’re plugged into, providing air-gapped security while allowing customers to turn over operations and maintenance of the datacenters to the clouds.

Privacy on the public Internet

But while VPCs and direct cloud interconnection have solved the problem of infrastructure moving to the cloud, as corporate networks move out of on-premise deployments, the cloud brings a completely new challenge: how do I keep my private cloud connections if I’m getting rid of my corporate network that connects all my resources together?

Let’s take an example company that connects a data center, an office, and an Azure instance together. Today, this company may have remote users that connect to applications hosted in either the datacenter, the office, or the cloud instance. Users in the office may connect to applications in the cloud, and all of it today is managed by the company. To do this, they may employ VPNs that tunnel the remote users into the data center or office before accessing the necessary applications. The office and data center are often connected through MPLS lines that are leased from connectivity providers. And then there’s the private IBM instance that is connected via IBM Direct Link. That’s three different connectivity providers for CIOs to manage, and we haven’t even started talking about access policies for the internal applications, firewalls for the cross-building network, and implementing MPLS routing on top of the provider underlay.

Cloudflare One helps simplify this by allowing companies to insert Cloudflare as the network for all the different connectivity options. Instead of having to run connections between buildings and clouds, all you need to do is manage your connections to Cloudflare.

WARP manages connectivity for remote users, Cloudflare Network Interconnect provides the private connectivity from data centers and offices to Cloudflare, and all of that can be managed with Access policies for policing applications and Magic WAN to provide the routing that gets your users where they need to go. When we released Cloudflare One, we were able to simplify the connectivity story to look like this:

Before, users with private clouds had to either expose their cloud instances to the public Internet, or maintain suboptimal routing by keeping their private cloud instances connected to their data centers instead of directly connecting to Cloudflare. This means that these customers have to maintain their private connections directly to their data centers, which adds toil to a solution that is supposed to be easier:

Now that CNI supports cloud environments, this company can open a private cloud link directly into Cloudflare instead of into their data center. This allows the company to use Cloudflare as a true intermediary between all of their resources, and they can rely on Cloudflare to manage firewalls, access policies, and routing for all of their resources, trimming the number of vendors they need to manage for routing down to one: just Cloudflare!

Once everything is directly connected to Cloudflare, this company can manage their cross-resource routing and firewalls through Magic WAN, they can set their user policies directly in Access, and they can set egress policies out to the public Internet through any one of Cloudflare’s 250+ data centers through Gateway. All the offices and clouds talk to each other on a hermetically sealed network with no public access or publicly shared peering links, and most importantly, all of these security and privacy efforts are done completely transparently to the user.

So let’s talk about how we can get your cloud connected to us.

Quick cloud connectivity

The most important thing with cloud connectivity is how easy it should be: you shouldn’t have to spend lots of time waiting for cross-connects to come up, get LOAs, monitor light levels and do all the things that you would normally do when provisioning connectivity. Getting connected from your cloud provider should be cloud-native: you should just be able to provision cloud connectivity directly from your existing portals and follow the existing steps laid out for direct cloud connection.

That’s why our new cloud support makes it even easier to connect with Cloudflare. We now support direct cloud connectivity with IBM, AWS, Azure, Google Cloud, and OCI so that you can provision connections directly from your cloud provider into Cloudflare like you would to a datacenter. Moving private connections to Cloudflare means you don’t have to maintain your own infrastructure anymore, Cloudflare becomes your infrastructure, so you don’t have to worry about ordering cross-connects into your devices, getting LOAs, or checking light levels. To show you how easy this can be, let’s walk through an example of how easy this is using Google Cloud.

The first step to provisioning connectivity in any cloud is to request a connection. In Google Cloud, you can do this by selecting “Private Service Connect” in the VPC network details:

That will allow you to select a partner connection or a direct connection. In Cloudflare’s case, you should select a partner connection. Follow the instructions to select a connecting region and datacenter site, and you’ll get what’s called a connection ID, which is used by Google Cloud and Cloudflare to identify the private connection with your VPC:

You’ll notice in this screenshot that it says you need to configure the connection on the partner side. In this case, you can take that key and use it to automatically provision a virtual connection on top of an already existing link. The provisioning process consists of five steps:

  1. Assigning unique VLANs to your connection to ensure a private connection
  2. Assigning unique IP addresses for a BGP point-to-point connection
  3. Provisioning a BGP connection on the Cloudflare side
  4. Passing this information back to Google Cloud and creating the connection
  5. Accepting the connection and finishing BGP provisioning on your VPC

All of these steps are performed automatically in seconds so that by the time you get your IP address and VLANs, Cloudflare has already provisioned our end of the connection. When you accept and configure the connection, everything will be ready to go, and it’s easy to start privately routing your traffic through Cloudflare.

Now that you’ve finished setting up your connection, let’s talk about how private connectivity to your cloud instances can integrate with all of your Cloudflare One products.

Private routing with Magic WAN

Magic WAN integrates extremely well with Cloud CNI, allowing customers to connect their VPCs directly to the private network built with Magic WAN. Since the routing is private, you can even advertise your private address spaces reserved for internal routing, such as your space.

Previously, your cloud VPC needed to be publicly addressable. But with Cloud CNI, we assign a point-to-point IP range, and you can advertise your internal spaces back to Cloudflare and Magic WAN will route traffic to your internal address spaces!

Secure authentication with Access

Many customers love Cloudflare Tunnel in combination with Access for its secure paths to authentication servers hosted in cloud providers. But what if your authentication server didn’t need to be publicly accessible at all? With Access + Cloud CNI, you can connect your authentication services to Cloudflare and Access will route all your authentication traffic through the private path back to your service without needing the public Internet.

Manage your cloud egress with Gateway

While you may want to protect your cloud services from ever being accessed by anyone not on your network, sometimes your cloud services need to talk out to the public Internet. Luckily for you, Gateway has you covered and with Cloud CNI you can get a private path to Cloudflare which will manage all of your egress policies, ensuring that you can carefully watch your cloud service outbound traffic from the same place you monitor all other traffic leaving your network.

Cloud CNI: safe, performant, easy

Cloudflare is committed to making zero trust and network security easy and unobtrusive. Cloud CNI is another step towards ensuring that your network is as easy to manage as everything else so that you can stop focusing on how to build your network, and start focusing on what goes on top of it.

If you’re interested in Cloud CNI, contact us today to get connected to a seamless and easy Zero Trust world.

We protect entire corporate networks, help customers build Internet-scale applications efficiently, accelerate any website or Internet application, ward off DDoS attacks, keep hackers at bay, and can help you on your journey to Zero Trust.

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David Tuber|@tubes__

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