CODEWITHSUNDEEP
google-app-engineip-addresscloudflare
sanc
sanc

Reputation: 231

Cloudflare retain original IP address with Google App engine

Cloudflare provides a number of solutions to retain the original client's IP address, but mostly it is for people who own access to the physical box or have IaaS.

For Google app engine, how can I make it work with Cloudflare such that I still can extract the original client's IP address?

Upvotes: 2

Views: 1487

Answers (3)

user2084795
user2084795

Reputation: 734

According to cloudflare support they are setting a header: CF-Connecting-IP.

To retrieve this header in java you can use

String paramIpAddress = request.getHeader("CF-Connecting-IP");
if (paramIpAddress == null) {
    paramIpAddress = request.getRemoteAddr();
}

Upvotes: 3

xxdesmus
xxdesmus

Reputation: 1276

You can also use HTTP_X_FORWARDED_FOR to get the "real" IP. It appears you can get at that in Java using these details:

 String ipaddress = request.getHeader("HTTP_X_FORWARDED_FOR");

 if (ipaddress  == null)
        ipaddress = request.getRemoteAddr();

Source = http://thepcspy.com/read/getting_the_real_ip_of_your_users/

Related and might be helpful: http://www.coderanch.com/t/293684/JSP/java/client-IP-address-Domain-Java

Upvotes: 2

Michael C.
Michael C.

Reputation: 1457

You can use the following server variables:

$_SERVER["HTTP_CF_CONNECTING_IP"] Real visitor IP address

$_SERVER["HTTP_CF_IPCOUNTRY"] Country of visitor

$_SERVER["HTTP_CF_VISITOR"] If its HTTP or HTTPS

Below is the sample codes in PHP:

if (isset($_SERVER["HTTP_CF_CONNECTING_IP"])) {
  $_SERVER['REMOTE_ADDR'] = $_SERVER["HTTP_CF_CONNECTING_IP"];
}

Upvotes: 0

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