Glossary: Django Beyond the Basics

Host addresses (127.0.0.1, 0.0.0.0)

Also written: 127.0.0.1, 0.0.0.0, localhost

127.0.0.1 is your own computer, so only you can reach a server bound to it, as with `runserver` and curl. 0.0.0.0 means "accept connections on every network address", which lets other machines reach gunicorn.