keep-open

A CLI tool to keep the forwarded ports (e.g. with SSH or Kubernetes) connected; a cross platform equivalent of

while true; do sleep $SECONDS; nc -vz $HOST $PORT; done

Periodically sends empty package to a given list of server / ports.

Usage

One-time run without installation:

npx keep-open -p localhost:1234 localhost:4321

Specify custom interval (default is 60s) and initial waiting time (default is 60s):

npx keep-open -p localhost:1234 localhost:4321 -w 10 -i 10

Install globally

npm i -g keep-open

Use in project

npm i -D keep-open

Then, can be used within the package.json's scripts.

Plays nicely with npm-run-all: can be run in parallel with npm scripts.

License

MIT