As Ztunnel operates at L4, we only have the destination IP/port (recovered via `SO_ORIGINAL_DST`).
This may be an IP of a Service, a Pod, or something outside the cluster.
Ztunnel will look up the destination from the [addresses](#address-type) it is configured with.

For traffic to unknown addresses, or to workloads that are not a part of the mesh, the traffic will just be passed through as is.