How secure is private networking?

If I have a docker swarm cluster communicating over the private networking feature of Digital Ocean, is that traffic able to be seen by all of the droplets in the region? For example, can a droplet owned by another digital ocean user attempt to join my swarm cluster? In general, how “private” is the private traffic.

Also, can a droplet from one region talk to a droplet in another region if both droplets are owned by the same account?


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Accepted Answer


As of July 2018, communication over DigitalOcean private networking is isolated to the resources within a single DigitalOcean account or Team. A Droplet owned by another DigitalOcean account has zero access to your account’s private networking.

In July 2018, Private Networking on DigitalOcean was updated to isolate communication over DigitalOcean Private Network IPs to resources within the account or team where they were created. For more information, see the release notes: DigitalOcean Private Networking Changes Scheduled for July 2018

The original discussion on this page is no longer accurate.


“Private” really just means internal to that datacenter. So it’s not all that private.~

And no, it’s only that datacenter. Private Networks don’t extend across datacenters.

Read the tutorial below and skim the comments. There’s a lot of discussion there.