SSHing to slave behind firewall

Hi everyone,
if I want to SSH into an on-prem slave sitting behind firewall from Drone cloud. How can I do it? Does Drone cloud have a fixed IP address I could add as an exclusion?

Thanks!

the servers are dynamically provisioned across multiple datacenters, and therefore do not have fixed or reliable IP addresses that would satisfy your use case. If this is a hard requirement, for security reasons (understandable), you may consider self-hosting your own Drone instance.