Speeding up your website with CDN

On the page that pops up, locate the CDN option. Click on ... to the right, then on Order a CDN or Activate option if the CDN option is already included in your hosting.

You will be redirected to a page where you can generate a purchase order. Once the order is paid, the service will be available within a few minutes.

On the page that opens, click on the My sites tab.

In the table that appears, click on the > button to the left of the name of the website to display the associated domain names or subdomains.

Then click on the ⁝ button to the right of the relevant domain name or subdomain, then on Activate the CDN.

In the window that opens, click on Confirm to activate the CDN.

On the page that opens, click on the My sites tab.

In the table that appears, click on the > button to the left of the name of the website to display the associated domain names or subdomains.

Then click on the ⁝ button to the right of the relevant domain name or subdomain, then on Clear CDN.

On the page that opens, click on the My sites tab.

In the table that appears, click on the > button to the left of the name of the website to display the associated domain names or subdomains.

Then click on the ⁝ button to the right of the relevant domain name or subdomain, then on Modify CDN.

• Always online: Allows CDN data to be kept online in the event of a server failure.

• HTTP/2: Protocol that enables your website to perform better in terms of security and latency.

• Dev-mode: Allows you to disable the cache during your website development.

• Brotli: Compression type that optimises the size of your cached files.

• Cache rule: Create up to 5 rules. They will set the cache refresh rate for specific resources on your site (see section below).

Once you have chosen your options, click Apply configuration, then Confirm configuration in the next window.

On the page that opens, click on the My sites tab.

In the table that appears, click on the > button to the left of the name of the website to display the associated domain names or subdomains.

Then click on the ⁝ button to the right of the relevant domain name or subdomain, then on Modify CDN.

Under Cache rule, click the Add a rule button.

• Rule name: Give your rule a name.

• URI: Enter the subset of resources for your website via its path in your website’s directory. For the CDN Basic and CDN Security offers, you can only enter a file extension.

• Lifespan: specify the caching time for the chosen resource.

• Order: Order your rules by execution order (lowest to highest).

Once you have made your choices, click the Create the rule button.

Rules will appear in the list. You can modify a rule by clicking on ..., then on Modify rule or delete it by clicking Delete the rule.

Once you have configured your rules and chosen your options, click Apply configuration, then click Confirm configuration in the next window.

On the page that opens, click on the My sites tab.

In the table that appears, click on the > button to the left of the name of the website to display the associated domain names or subdomains.

Then click on the ⁝ button to the right of the relevant domain name or subdomain, then on Modify CDN.

• Cross-Origin Resource Sharing (CORS): In the list, enter the external domain names that will be authorised to access your website’s resources for the purpose of sharing them.

  Once you have enabled this feature, click Edit list of external resources to add the domain names that are authorised to share your resources.

  

  Once you have completed your list, click Confirm.

• HTTPS-Redirect: Protect all traffic to your website by redirecting it to the HTTPS protocol temporarily or permanently.

  Once you have enabled the feature, click the drop-down menu to choose between Permanent redirection (301) or Temporary redirection (302).

  

• HTTP Strict Transport Security (HSTS): Force HTTPS access to your website. This way, your hosting is secure against downgrade (or rollback) attacks.

  Once the feature is enabled, determine the lifetime for which the browser will apply HSTS on your website.

  

• Mixed content: Enforce the integrity of all your web pages's content. Pages will be loaded securely, contributing to an optimal user experience. All of your website’s internal and external resources must be available in HTTPS, to avoid a browser error.

• Application firewall: The Web Application Firewall (WAF) protects your website from fraudulent attacks such as code injections, illegitimate requests or data theft. It covers the main known vulnerabilities on the web by filtering requests and packets transmitted (the list of vulnerabilities is managed by OVHcloud and regularly updated).

On the page that opens, click on the My sites tab.

In the table that appears, click on the > button to the left of the name of the website to display the associated domain names or subdomains.

Then click on the ⁝ button to the right of the relevant domain name or subdomain, then on Modify CDN.

• Geolocation HTTP Header: Determine the country of the visitor to customise the proposed experience. The country code is automatically added in the header of each request to be handled by your original server. The identification elements in the header are called Geo-Country-Code, Geo-Country-Name, Geo-Region, Geo-City.

• Prefetch: Anticipate the next resource being loaded. Preload it automatically in the CDN cache using your website’s header link. This mechanism is mainly used to load CSS, JavaScript, images, favicons or web fonts that are required by the website theme.

  In the example below, when the current page is displaying 'Hi', a subquery triggers the preloading of the resource /cache/style.css.

  <?php
  header("Link: </cache/style.css>; rel=prefetch");
  print 'Hi'
  ?> 

• Mobile redirect: Automatically redirect "Mobile" visitors to an optimised website. Choice: redirect systematically to the root of another website, or keep the URL by replacing only the domain (or subdomain).

• Advanced Purge: Customise your purge by choosing which elements of the cache to clear: the entire site, a folder, a URI, a file extension, or using a custom regular expression.

  In the My sites tab, click on the ⁝ button to the right of the domain name or subdomain concerned, then click on Clear CDN.

  

• Query String: Content caching management, based on the parameters (also called Query String) of the URL query. Depending on your configuration, choose the behaviour of the CDN cache:

  • Disabled: The resource is cached with its unsorted parameters. This will create, for example, 2 iterations in the CDN cache for 2 URLs with the same parameters in a different order.
  • Enabled - Sort Settings: The resource is cached by sorting its parameters. You will need to sort it before storing the URL in the CDN cache. For example, only one iteration will be kept for 2 URLs with the same settings in a different order.
  • Enabled - Ignore settings: The resource is cached without any parameters. The CDN cache will not take into account the parameters entered in the URL, so it will store the URL without the parameters in the cache.

• Prewarm: Force permanent caching of your critical resources. The CDN automatically anticipates and refreshes the cache, without waiting for a user request. This function applies only to static content, with a TTL greater than 0, and the resource must not exceed 1 GB. A gauge tells you the level of resource consumption in Prewarm, depending on your URL list. The total resources called by these URLs must not exceed 1 GB.

  To define the list of URLs that should be in Prewarm, click Edit URL List.

  Using the Protocol, Domain Name, and Resource Path fields, type one of the links to a resource that you want to add to the Prewarm function, and then click Add.

  A list is created in the lower frame, with all the links you have listed, you can delete the link of your choice by selecting it, then clicking Remove.

  

• Cache rule: Create up to 100 rules. They set the cache refresh rate for specific resources on your site. Continue reading the guide in the next part for more information.

Once you have chosen your options, click Apply configuration, then Confirm configuration in the next window.

On the page that opens, click on the My sites tab.

In the table that appears, click on the > button to the left of the name of the website to display the associated domain names or subdomains.

Then click on the ⁝ button to the right of the relevant domain name or subdomain, then on Modify CDN.

Under Cache rules, click the Add a rule button.

• Rule name: Give your rule a name.
• Resource type: Choose from the options below:
  • Extension: Please enter a valid file extension without putting a period, for example: CSS.
  • File: Please enter a valid path for one of the folders in the root directory of your website.
  • Custom regular expression: It applies to all URIs on your website.
  • URI: Enter the subset of your website’s resources via their URL path.
• Resource: set attributes based on the type of resource you choose.
• Lifespan: Specify the cache duration for the chosen resource.
• Order: Order your rules by execution order (lowest to highest).

Once you have made your choices, click the Create rule button.

Rules appear in a list. You can edit a rule by clicking ... to the right of the rule, then Edit Rule. You can delete it by clicking Delete Rule.

Once you have configured your rules and chosen your options, click Apply configuration, then Confirm configuration in the next window.

On the page that opens, click on the My sites tab.

In the table that appears, click on the > button to the left of the name of the website to display the associated domain names or subdomains.

Then click on the ⁝ button to the right of the relevant domain name or subdomain, then on Edit a domain.

Untick "Activate the CDN", click Next and then Confirm.

Locate the CDN option. Click on ... to the right, then on Cancel the CDN.

Click Confirm to continue with the cancellation.