Blog/CDN

Insights and advice for improving web performance.

Make Use of X-Forwarded-For with a CDN

Make Use of X-Forwarded-For with a CDN

The X-Forwarded-For (XFF) HTTP header field is a de facto standard for identifying the originating IP address of a client connecting to a web server through a content delivery network (CDN). KeyCDN forwards this HTTP header to any origin server of a Pull Zone. About X-Forwarded-For Without the XFF HTTP header or any other similar technique, a connection through a CDN would only reveal the IP of the POP but not the end client.

February 25, 2015 Read more
CDN Infographic - What Is a Content Delivery Network?

CDN Infographic - What Is a Content Delivery Network?

The main goals of a content delivery network (CDN) are about speed, scalability, and reliability. KeyCDN built a CDN for simpler use at minimum cost. The following infographic explains the basic concept of a CDN. CDN infographic A content delivery network (or content distribution network) is a system of strategically positioned servers around the globe. You can grab the embed code for the CDN infographic above from Visually. KeyCDN will supercharge your website.

February 13, 2015 Read more

Origin Shield - Extra CDN Caching Layer

KeyCDN is excited to provide the Origin Shield feature for free to all customers. This extra caching layer reduces the load on your origin server and accelerates the distribution of your content from the origin server to our edge servers. The shield servers are highly redundant and automatically select the optimal location using our geolocation technology. How does Origin Shield work? When a client requests content from your website and that content has never been cached by any of KeyCDN's edge servers, this is what happens with that request when Origin Shield is enabled: Requests don't come from our growing number of edge servers but are filtered through selected shield servers.

January 29, 2015 Read more

CDN Analytics: The Next Level of Reporting

We are excited to announce that our next generation analytics platform is fully in production now. Many new statistics are available in the dashboard. Such as Usage and Analytics. The new CDN analytics give you more insights on your traffic pattern. CDN analytics The analytics section under the reporting tab of the KeyCDN dashboard provides detailed information regarding HTTP and cache statuses. You can even drill down into a single Zone or select a date range to display a greater timeline of data.

January 8, 2015 Read more

KeyCDN - The WordPress CDN for Everyone

In order to ensure best user experience and optimal WordPress SEO, a CDN plays a key role in delivering content fast and reliable. KeyCDN works seamlessly with all common WordPress CDN plugins and makes sure your site is super fast. It's is the WordPress CDN of your choice. WordPress (WP) has been one of the most successful content management systems (CMS) out there, and now powers over 25% of the internet.

November 24, 2014 Read more

Cache Hit Percentage (CHP)

The cache hit percentage (CHP) gives precise information about the amount of files served from the CDN without any requests to the origin server. In this post we will highlight what has an impact on CHP and what can be done to improve it. The cache hit ratio will only apply for Pull Zones. The CHP is measured among all files served from a Pull Zone regardless of the file size or file type.

November 2, 2014 Read more

CDN OCSP Stapling

HTTPS is ubiquitous these days and plays a crucial role in making the web safer and more private. We encourage our customers to use HTTPS whenever possible (check out our feature "Force SSL"). Now that everyone is using HTTPS, we don't want to scarify any performance for a safer connection. We at KeyCDN are passionate about offering best performance not only for HTTP but also for HTTPS. Our mission is to make the web faster and more secure.

September 2, 2014 Read more

Using CORS with a CDN

CORS stands for Cross-Origin Resource Sharing and is an essential component when files (e.g. fonts or JavaScript) are loaded from another domain (e.g. a CDN) other than the website. In this article we show you how to use CORS with CDN. Especially Firefox (FF) and InternetExplorer (IE) are causing problems when CORS is not handled correctly. FF and IE are considering requests to CDNs as "cross-domain" requests and won't load them unless it is explicitly stated in the HTTP header.

July 10, 2014 Read more

CDN SSL: 4 Simple Steps to Integrate Your SSL Certificate

KeyCDN offers custom HTTPS CDN SSL integration for free. A Custom SSL is also known as Private SSL. This article is about how to get and deploy an SSL certificate (cert) for your own domain. If you already have an SSL certificate, you can use it and don't need to order a new one. CDN Custom SSL is only needed if you want to use your CNAME in combination with HTTPS.

June 22, 2014 Read more

CDN Performance - Measure with WebPageTest

Customers sometimes ask us how to measure the performance improvement after migrating to KeyCDN. This post is about how to easily and conveniently measure the performance of a website. CDN performance measured by WebPageTest The best known website for website performance testing is WebPageTest. It offers performance tests from many locations worldwide with different browsers to choose. Once you have migrated to KeyCDN, WebPageTest will automatically recognize the CDN and display it accordingly.

June 19, 2014 Read more
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