Eric Bergman-Terrell's Blog

Node.js / Express Programming Tip: How to Determine IP Address from an HTTP Request
August 20, 2015

You may find that req.connection.remoteAddress does not have the user's IP address, especially in a hosted environment. The solution is to use req.headers['x-forwarded-for'], if available. Otherwise use req.connection.remoteAddress. For example:

exports.getIPAddress = function(req) {
    return req.headers['x-forwarded-for'] || req.connection.remoteAddress;

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Keywords: Node.js, Express, IP Address, Javascript

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