Content Delivery Network (CDN)

CDN FAQ




CDN: Technical FAQ and options



General FAQ:


Why use the OVH CDN on my websites?

Integrating your website into the CDN will bring many advantages for your traffic and conversion rates. The Content Delivery Network speeds up your site and brings content closer to your visitors, regardless of their location in the world, by replicating it on multiple servers.

The information is sent faster and latency time (which can be very long for users located on other continents) is significantly reduced. CDN gives your site a real competitive edge, by enhancing performance and improving improve your search engine ranking as a result.

This will enable you to improve your search engine ranking. Another feature of the OVH CDN is that it also works as a shield for your website by blocking external threats (abusive crawls, DDoS attacks). Discover many advantages of the OVH CDN.

How do I protect my websites against attacks?

A Content Delivery Network (CDN) will act as a shield for your website by absorbing DDoS attacks, preventing abusive crawls from overloading the server, and connection loss, etc.

Your hosting system is no longer in the firing line - it is protected by the network, reducing risks to your critical applications and thus improving QoS. .

Who can use CDN?

Particularly well-adapted to professionals with international websites, or those wishing to develop their business internationally, without deploying complex infrastructure or increasing operating costs, and looking to save on current hosting packages.

A CDN adapts to any type of website: e-commerce, content sharing, news, blogs, etc.

Where are the OVH points of presence in the world?

OVH has PoPs located in the Americas, Asia and Europe. Being present throughout the world allows us to optimise and reduce loading times for multilingual websites, and to distribute your content globally by bringing them geographically closer to your visitors.

Do I have to change my website code?

Generally, you won't have to change anything in your code. Simply change the IP of the DNS and point the CNAME of your domain to the CDN IP address, which will be provided to you by email after placing your order.

However, it is necessary to authorise the caching in the http header in accordance with the RFC rules. The CDN conforms to this information in case of any incoherence with the configuration in your Control Panel.

There are four specific headers on caching.

  • Cache-Control
  • Expires
  • ETag
  • Last-Modified

The most important header is Cache-Control, which is a collection of diverse information on the cache.:w

Can I choose which sections of my website to put on the CDN?

Absolutely. You can either cache your entire site, one file type or just one subdomain on the CDN using the configuration module of your OVH Control Panel.



Technical FAQ:


Is a particular type of hosting or backend needed for the sites using my CDN?

Your website might be hosted on any type of hosting platform (web hosting, dedicated server, cloud...) either with OVH or another provider.

Simply point the your domain's CNAME record to the CDN IP that was provided to you in the order confirmation email.

How to integrate a new domain into my CDN?

To enable CDN on your website, simply change the CNAME IP address of your DNS for the one provided in the email order confirmation.
Please ensure you are authorised to change your DNS. You can then adjust your TTL, force or prevent caching, and manage the SSL certificate, etc.

How do I change the DNS zone?

If your domain is managed by OVH, go to your Control Panel > DNS management > DNS zone, then simply point your domain's CNAME to the CDN IP address provided to you by email after placing your order.

If your domain is not managed by OVH, go to your service provider's control panel and point the your domain's CNAME to the CDN IP, which will be provided to you by email after placing your order.

What happens if I exceed the traffic limit for my entire CDN?

Once you exceed your traffic credit, the CDN will be automatically disabled and your standard hosting system will handle the load of all your visitors.

To reactivate OVH CDN, you will have to log into your Control Panel to order traffic credit (1 TB, 10 TB or 100 TB).

Can I use an SSL certificate?

The CDN is provided with a dedicated IP Anycast. You can attach an SSL certificate to it from your OVH Customer account. Note that the CDN can also be used with multiple SSL certificates by signing up for multiple Dedicated CDN services.

(Available soon)

Is there a limitation on the cache size in the PoPs of my CDN?

Content Delivery Network OVH allows you to cache all the static content of your web applications. In order to meet the 99.95% SLA while maintaining the QoS, a limit of 30 MB per object has been put in place.

What are the default cache rules?

The cache works differently depending on which offer you have. To compare the different rules applied, please visit our relevant web page.

What is an IP Anycast?

An IP Anycast has specific routing. Unlike a conventional IP pointing to a unique location, an IP Anycast allows you to access several points, differentiated by the performance of the exchange.

In concrete terms, a user wanting to access a website which uses the CDN will be redirected to the closest PoP in order to optimise the response time.

Can I add new backends?

Yes, the basic CDN pack allows you to declare up to 10 backends. Beyond 10, it is possible to subscribe to additional backends directly from your Control Panel.

How do I order additional traffic for my CDN?

Directly from your account. You can order 1 TB, 10 TB or 100 TB without any expiry date (however, a monthly subscription is required to use this bandwidth).

How do I manage the GeoCache Accelerator (included with the new Web hosting services)?

The cache can be cleared by force as required. You can also disable and re-enable it. To find out more about managing the GeoCache Accelerator, read our guide.

How do I use WebStorage CDN?

You can add and manage your files via the Control Panel, the WebApp or the APIs. To find out more about managing the WebStorage CDN, check out our guide.