listenr

listenr is a small CLI that shows current listening ports and enriches Docker-exposed ports with container/service names.

Install

cargo install --path .

Usage

listenr

The tool:

• collects listeners from lsof -i -P -n and keeps only (LISTEN) rows
• enriches matching host ports from docker ps --format '{{.ID}}\t{{.Names}}\t{{.Ports}}'
• prints a table with PORT, PROTO, HOST, PROCESS, and DOCKER

If Docker is unavailable, listenr still prints local listeners and shows a warning on stderr.

Example Output

PORT   PROTO  HOST       PROCESS                  DOCKER
3001   TCP    *          OrbStack (pid 11645)    uptime-kuma (a2c2ce057b71) -> 3001/tcp
6379   TCP    127.0.0.1  redis-ser (pid 547)     -
7751   TCP    *          OrbStack (pid 11645)    tabemap-app (601f67a6c86c) -> 7751/tcp