Hi, I have 1 express and 1 react application in the same droplet. I have an Express API and I only want my react application to use it, nothing else. Currently, my react app is on example.com and Express on api.example.com and everyone can access api.example.com. I would like to limit access to api.example.com

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1 answer

Hi there @yigiteren,

I believe that one way to do so is to add an additional middleware and only allow requests from your specific IP.

You could use something like this:

function restrictAccess(req, res, next) {
      if (req.headers['origin'] !== 'https://example.com') {
        res.sendStatus(403);
      } else {
        next();
      }
    }

However, this could be manipulated as people could add additional headers to their requests if they wanted to, so a better approach would be to use a JWT token for authentication. To do that you could take a look at these two tutorials here:

https://www.digitalocean.com/community/tutorials/api-authentication-with-json-web-tokensjwt-and-passport

https://www.digitalocean.com/community/tutorials/nodejs-jwt-expressjs

Hope that this helps.
Regards,
Bobby

by Obielum Godson
Many web applications and APIs use a form of authentication to protect resources and restrict their access only to verified users. This guide will walk you through how to implement authentication for an API using Json Web Tokens (JWTs) and Passport, an authentication middleware for Node.
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