This is a test docker image that implements RFC862 echo service via TCP only.
A server listens for TCP connections on TCP port 7. Once a connection is established any data received is sent back. This continues until the calling user terminates the connection.
Source is maintained on GitHub:
https://github.com/kkonstan/docker-test
An automatic build is available at the Docker Hub:
https://registry.hub.docker.com/u/kkonstan/docker-test/
It can be ran like this:
docker run -p 7:7 kkonstan/docker-test