If you have more than one frontend server running in your business, it’s needed to load balance the traffic between the nodes. In this case we have a new instance between the browser and the web-server.
If the load balancer or proxy receives a request from a browser, it forwards it to backend server in the internal network. The IP address of the client is than added to a forward header which contains the IP address of a forward chain.
X-Forwarded-For: client, proxy1, proxy2
In some situation i.e. for GEO-IP checks, you need the real IP address of a client. If you don’t configure Magento the remote address is always 127.0.0.1.
That’s not what we want. We need the first part of the comma separated list of the IP chain. Magento offers us a mechanism to solve this issue.
The key to solve the issue is the class
Magento\Framework\HTTP\PhpEnvironment\RemoteAddress which is provided by the Magento 2 framework.
In Magento 2 it’s prohibited to call the
$_SERVER['REMOTE_ADD'] directly. The RemoteAddress class is a wrapper to deal with the remote address.
The correct way to get the remote address is this:
* @var RemoteAddress
public function __construct(RemoteAddress $remoteAddress)
$this->remoteAddress = $remoteAddress;
public function doSomething()
$ipAddressOfTheClient = $this->remoteAddress->getRemoteAddress();
It’s possible to inject a list of alternative headers to the RemoteAddress class by Dependency Injection. This config isn’t related to any module. It’s a special config for a production server setup.
It’s important to know that Magento 2 will load any „di.xml“ file from any subfolder of the „app/etc“ folder!
With this information we can create a subfolder like „app/etc/myproject/di.xml“ with the following content:
<argument name="alternativeHeaders" xsi:type="array">
<item name="x-forwarded-for" xsi:type="string">HTTP_X_FORWARDED_FOR</item>
After that Magento will look into the given HTTP header „X-Forwarded-For“. The name of the header is normalized by PHP.
X-Forwarded-For is available as
It’s possible to add more than one header to alternative header list.
That’s it. Have fun with Magento 2. 🙂
– Creator of n98-magerun
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– Magento user since version 0.8 beta
– 8x certified Magento developer
– PHP Top 1.000 developer (yes, I’m PHP4 certified and sooooo old)
– Chief development officer at netz98