During your build process, you may be connecting to one or more 3rd party services, such as a repository server or a remote database.

For security reasons, we restrict outbound connections from the build servers to a small number of ports, which are as follows:

### TCP ports
* 22
* 53
* 80
* 443
* 3306
* 5432
* 6379
* 9418
* 25060

### UDP ports
* 53

So that DeployHQ can connect to the remote server, you'll need to ensure the protocol and connection is able to accept connections [from our IP ranges](https://www.deployhq.com/support/faq/our-ip-ranges) on one of those ports.