The port of the backend that was used for this request.
beresp.backend.port is used in the following code examples. Examples apply VCL to real-world use cases and can be deployed as they are, or adapted for your own service. See the full list of code examples for more inspiration.
Click RUN on a sample below to provision a Fastly service, execute the code on Fastly, and see how the function behaves.
Fastly offers a myriad of different variables that you can log. See and test a large collection here.