How does Bitbucket connect through a corporate firewall when the runner is on a company network?

Illya Kuzmych

I am using a Bitbucket runner for some work, as a library that is necessary for the pipeline is hosted on the company's private server, and a runner is one of the methods I can use to gain access and use those libraries.

Some security concerns arose regarding how Bitbucket gains access to my computer through a corporate firewall, and through what encryption/authentication method is it able to do so?

 

Thanks, hopefully this question is clear.

Ben

Hi Illya,

So Pipelines will communicate through our Stargate API to establish a connection with your runner (so that it can communicate to your private IP address).
Once it has established a connection - it uses websocket rather than HTTP to maintain the connection between client/server.

For the connectivity  described above, you would need to have inbound whitelisting configured for our IP addresses as follows to establish the initial connection:

104.192.136.0/21
185.166.140.0/22
18.205.93.0/25
18.234.32.128/25
13.52.5.0/25

Once established, Pipelines will communicate between your local Runner and the Bitbucket Cloud UI via this websocket where commands are sent to be executed by either the container running on a Kubernetes pod (Pipelines) or self-hosted infrastructure (Runners).

The build status updates are then returned back in the same manner based on the success of those command executions.

Hope this helps.

Cheers!

- Ben (Bitbucket Cloud Support)