there are 3rd party foss options (1):

1. ephemeral + zero implicit trust (2) https://blog.openziti.io/my-intern-assignment-call-a-dark-we...

2. zero implicit trust: https://github.com/openziti/ziti-webhook-action

(1) disclosure, maintainer (2) zero implicit trust in this case = no open inbound ports on underlay; need to access via app-specific overlay which requires strong identity, authN, authZ