REST API
Notes and Domino is not a closed platform. It’s an application framework that offers various APIs and languages to access database content and the built-in user interface. There is even a complete REST API available that only needs a server task to run and has a configuration interface that needs almost no programming skills.
@Formulas, LotusScript and Java, XPages, C API, Domino Query Language
Proxy for web and nrpc traffic
If you need to connect the server with the internet, do it behind a reverse proxy. There is an open source project available right away.
You can proxy the http web server – the Domino https part and the Notes NRPC (Notes Remote Procedure Call) server using e.g. nginx server. Github has all the details.
Daniel Nashed bloggt about this in a very good post about the web and nrpc proxy.