express-rate-limit blocking requests from all users

By default, express-rate-limit has a keyGenerator of req.ip. When I log this on my server it is '::ffff:127.0.0.1' which is obviously going to be the same for every request, thus limiting for all IP addresses once it’s limited for one.

My solution was to use request-ip to get the correct IP address like so:

const rateLimit = require('express-rate-limit');
const requestIp = require('request-ip');

const app = express();

app.use(requestIp.mw());

app.use(rateLimit({
  windowMs: 60 * 1000, // 1 minute
  max: 30, // limit each IP to 30 requests per windowMs
  keyGenerator: (req, res) => {
    return req.clientIp // IP address from requestIp.mw(), as opposed to req.ip
  }
}));

keyGenerator: function (req: any) {
    return req.headers["x-forwarded-for"] || req.connection.remoteAddress; 
}