Forwarding concepts
Port-range Rules
A single rule maps a contiguous listen-port window onto a same-offset target window.
How to set it up: Standalone (TOML) · Server + Client (operator)
Available since v0.2.0. A single rule binds many listeners atomically.
How it works
A port-range rule maps a contiguous listen-port range onto the same offset in a contiguous target-port range on a single upstream host.
Listen 30000-30050 → upstream.local:30000-30050
^ each port forwards to its same-offset target
(30005 → upstream.local:30005, etc.)Range rules collapse to one row in list-rules and one row per
collector in /metrics regardless of range size. Per-port detail is
opt-in via --per-port.