` is the domain name of your website, e.g., `example.com`.
1. Add the following code into the `index.php` file you created:
```php
Secure token generator website
Secure link generator
Below, a signed link to the secure CDN resource has been generated. The link is valid for five minutes. The content at this link is available only to the user the link was generated for by the website (verified by IP address).
';
$ip = trim(getUserIpAddr());
$domain_name = '';
$path = '';
$expires = time() + 300;
$link = "$expires$path$ip $secret";
$md5 = md5($link, true);
$md5 = base64_encode($md5);
$md5 = strtr($md5, '+/', '-_');
$md5 = str_replace('=', '', $md5);
$url = 'Signed link to file';
echo "Your IP address: ".$ip."
If you are using a VPN, you link may not work. For the signed link generator to work properly, disable your VPN.
";
echo "
";
echo $url;
function getUserIpAddr() {
if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
$addr = $_SERVER['HTTP_CLIENT_IP'];
} elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
$addr = $_SERVER['HTTP_X_FORWARDED_FOR'];
} else {
$addr = $_SERVER['REMOTE_ADDR'];
}
return $addr;
}
?>
```
Where:
* `$secret`: Secret key created when configuring the CDN resource.
* `$domain_name`: Domain name of the created CDN resource, e.g., `cdn.example.com`.
* `$path`: [Key of the object](../../../storage/concepts/object.md#key) in the [source](../../concepts/origins.md) bucket, e.g., `/content.jpg`. It must contain `/`.
The website will generate a signed link to access this object via the CDN resource.
## Test secure access to files {#check}
To test the generator of signed links to the secure CDN resource:
1. In your browser, go to the website you created, e.g., `https://example.com`.
1. Click the link that was generated.
If everything works as it should, you will see the image hosted on the secure CDN resource.
{% note info %}
An active VPN may interfere with the signed link generator's operation. For the website to work correctly, disable your VPN.
{% endnote %}
1. Open the generated link on another device that uses another IP address to access the internet, e.g., a smartphone.
Access to content will be denied.
1. Try opening the link on the first device after the five-minute timeout expires.
Access to content will be denied.
You have configured secure access to your content.
When generating links, you can also [specify](../../operations/resources/enable-secure-token.md) a trusted IP address, e.g., the one used for internet access in your corporate network. Thus you will restrict access to your content from outside your company’s network infrastructure.
## How to delete the resources you created {#clear-out}
To stop paying for the resources you created:
1. [Delete](../../operations/resources/delete-resource.md) the CDN resource, then [delete](../../operations/origin-groups/delete-group.md) the origin group.
1. [Delete](../../../storage/operations/objects/delete.md) the objects you created in the bucket, then [delete](../../../storage/operations/buckets/delete.md) the bucket itself.
1. [Delete](../../../compute/operations/vm-control/vm-delete.md) the VM you created.
1. [Delete](../../../dns/operations/zone-delete.md) the domain zone you created.
1. [Delete](../../../certificate-manager/operations/managed/cert-delete.md) the TLS certificate you created.
1. [Delete](../../../vpc/operations/security-group-delete.md) the security group you created, then [delete](../../../vpc/operations/subnet-delete.md) the subnet you created, and finally, [delete](../../../vpc/operations/network-delete.md) the network you created.
#### Useful links {#see-also}
* [Providing secure access to content in Cloud CDN through Terraform](terraform.md)