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Questions tagged [cdn]

A content delivery network or content distribution network (CDN) is a system of computers containing copies of data placed at various nodes of a network.

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88 votes
5 answers
69k views

How can CloudFlare offer a free CDN with unlimited bandwidth?

The CloudFlare free tier service offers unlimited bandwith while other CDNs charge starting at about $.10/gb. CloudFlare does not have bandwidth limits. As long as the domains being added comply ...
Mike's user avatar
  • 1,185
47 votes
4 answers
30k views

How to use Cloudflare and Namecheap email forwarding at the same time?

I want to use Cloudflare, and it requires that I use their nameservers. The problem is that I'm using some features from Namecheap like email forwarding, which will be disabled (if I didn't get it ...
ChocoDeveloper's user avatar
45 votes
5 answers
12k views

Why do big sites host their images/css on external domains?

Why do sites like Facebook, Twitter, and Google host their images and css on external domains such as: Facebook: static.ak.fbcdn.net Twitter: a0.twimg.com Google: ssl.gstatic.com Question(s): Is is ...
Rick Rhodes's user avatar
40 votes
4 answers
1k views

When did you decide to use a CDN? How did you measure the "success" of using a CDN?

When did you decide to use a Content Delivery Network? How did you measure the "success" of using a CDN to help justify the additional cost? Added a bounty. Hoping to get interesting stories from ...
artlung's user avatar
  • 8,648
35 votes
1 answer
30k views

How does CloudFlare's Rocket Loader actually work (and how can a developer ensure compatibility)?

CloudFlare has quite a ground-breaking technology called Rocket Loader (both on free and paid accounts). But how does it actually work? They have a couple of pages that describe the technology, but ...
Simon East's user avatar
33 votes
6 answers
12k views

What is the advantage to hosting static resources on a separate domain?

I notice a lot of sites host their resources on a separate domain from the main site, e.g. StackExchange using sstatic.net, Barnes & Noble using imagesbn.com, etc. I understand that there are ...
Michael Ekstrand's user avatar
26 votes
3 answers
11k views

How does a CDN like CloudFlare work?

What I understand so far: You keep your current web hosting, but you change the DNS servers for your site from the DNS servers of your current hosting to CloudFlare's DNS servers. CloudFlare serves ...
Šime Vidas's user avatar
25 votes
5 answers
45k views

Local files vs. CDN

If website load time is a concern, which is generally better to use when referencing a JavaScript or CSS file? Would using a CDN be better or would that just add more HTTP requests?
Omar Rahman's user avatar
22 votes
3 answers
32k views

Is it possible to use cloudflare without having them managing my DNS?

I need to use cloudflare without having them managing my DNS, My DNS server have much more options that I do need. Instead of setting cloudflare as my dns server, I have added it as a NS record from ...
sharp12345's user avatar
19 votes
4 answers
23k views

Is the Bootstrap CSS on a CDN yet?

Just checking to see if anyone knows of a CDN for the bootstrap css framework.
Phillip Senn's user avatar
19 votes
2 answers
2k views

Where can I find the full list of Google/Microsoft CDN hosted AJAX files?

While Google hosts this list and Microsoft hosts this one there are several files missing such as jQuery UI CSS. Where can I find a complete listing of all the resources offered for major AJAX CDNs, ...
18 votes
2 answers
88k views

Font blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin'

we are experiencing this error in Google Chrome. We thought everything was set-up correct. But maybe not? Font from origin http://skin.cdn.com has been blocked from loading by Cross-Origin ...
snh_nl's user avatar
  • 653
18 votes
4 answers
8k views

CDN - Content Delivery Networks. How do they work and why would I want to use one?

What exactly is a Content Delivery Network (CDN), how does it work, and why would I want to use one for my web site? Which are the well-known CDNs out there?
Chris W. Rea's user avatar
  • 3,763
17 votes
2 answers
15k views

Is there a way of using HTTPS with Amazon's CloudFront CDN and CNAMEs?

We use Amazon's CloudFront CDN with custom CNAMEs hanging under the main domain (static1.example.com). Although we can break this uniform appearance and use the original whatever123wigglyw00....
Metalshark's user avatar
  • 3,683
16 votes
3 answers
10k views

Can I use imgur as a CDN?

I have an e-commerce site and I want to use imgur.com as a CDN for my product images by setting the image source of my image. I did not see anything in the ToS specifically about this. Can anyone ...
Jakcst's user avatar
  • 261
16 votes
2 answers
14k views

Can I route only a subdomain through CloudFlare?

I'm currently using Amazon CloudFront as a CDN for my images on a subdomain img.example.com, from an origin origin.example.com. I recently saw that CloudFlare provide a CDN for a flat fee so I'm ...
DisgruntledGoat's user avatar
14 votes
1 answer
739 views

When and when not to use a CDN

I'm working on a web-application that loads a couple of small gif images onto the screen. I'm using a relative path, which means they are loaded from the same web server that serves the php page. The ...
user avatar
12 votes
2 answers
5k views

is it true that CloudFlare really doesn't affect dynamic content?

I've been reading the CloudFlare FAQ, I understand that is acts as a reverse proxy and all requests to your domain will go through CloudFlare. They say in the FAQ that it won't slow down dynamic ...
fiftyeight's user avatar
12 votes
2 answers
4k views

Can CloudFlare use different origins based on path pattern?

I'm trying to switch from AWS CloudFront to CloudFlare. Currently, my web site is hosted on EC2 and my large static files are placed in S3 separately. CloudFront let me serve the web pages and the ...
Andy Li's user avatar
  • 223
12 votes
4 answers
10k views

Google doesn't crawl CDN files

I've noticed that Google Webmaster Tools is reporting a lot of blocked resources in my website. Right now all the "blocked resources" are .css, .js and images (.jpg, .png) that I serve from Cloudfront ...
tonelot's user avatar
  • 191
12 votes
2 answers
943 views

When to switch to a CDN?

I have read about CDNs and what they do. The question I have is three fold. When should you start to use a CDN? My site is small currently and do not see the need for a CDN but is there a general ...
L84's user avatar
  • 2,016
11 votes
3 answers
27k views

What's the best FREE CDN service available? [closed]

It seems like using CDN is a best option to provide users a great browsing experience. But, plans of the major CDN providers seem costly. So, I would like to get used to the CDN thing before I ...
San's user avatar
  • 559
11 votes
2 answers
2k views

Image CDN with API?

My company uses Flickr and Picasa web albums as poor man's content delivery networks (CDN) for image hosting, but I'm curious if anyone has any recommendations on any other services that might be ...
Dan Gayle's user avatar
  • 858
10 votes
2 answers
3k views

Do I set a DNS A Record for the new GitHub Pages to use their CDN?

GitHub updated their Pages service for custom domains yesterday and I'm not clear on one small detail. They recommend a CNAME record for www.example.com but do not recommend using A records for the ...
Tom Brossman's user avatar
  • 2,291
9 votes
1 answer
2k views

How is Apple's enormously image-heavy site served so fast?

Took a profile of the "Smart Cover" page on Apple's site using Pingdom. It's requesting 241 objects for a total page weight of 3472.6 KB! An absolute mammoth. How does this possibly translate into ...
Jon's user avatar
  • 193
8 votes
2 answers
5k views

Facebook crawler with no user agent spamming our site in possible DoS attack

Crawlers registered to Facebook (ipv6 ending in :face:b00c::1) were slamming our site, seeing 10s of thousands of hits in just 20 minutes. We noticed they didn't have a user agent in the header and ...
L Martin's user avatar
  • 4,013
8 votes
1 answer
1k views

Does Google reward sites for using images from different domains, sub domains and CDN's?

I believe that images on the same domain can contribute to search engine rankings (mainly Google), example: http://example.com/image.jpg helps http://example.com So it is my understanding that using ...
Andy Fleming's user avatar
7 votes
2 answers
1k views

Can we serve our sites images with an ad server and not have the images blocked by ad blockers?

For speed of deployment on a custom build site we were looking at using an AdServer system for the delivery and management of in-house banners, videos and selective graphical elements. Yes, some were ...
Sean's user avatar
  • 71
7 votes
3 answers
547 views

Creating a CDN to boost page ranking?

I had a thought about CDNs and if they affect page rankings. Lets say hypothetically if I was to create a CDN as a subfolder in my site. This folder would contain a resource that is useful e.g. ...
tomaytotomato's user avatar
7 votes
2 answers
266 views

Separating static/uploaded content from the site

I have a site where I anticipate to have a large amount of users. I've heard that it is a good idea to separate user content (uploaded images) and place them on a separate static server where lighttpd ...
user7562's user avatar
  • 225
7 votes
1 answer
263 views

How much do other CDNs charge? [closed]

I'm currently using Amazon S3 and CloudFront as a CDN to serve my images. Amazon publish their prices on the site: $0.120 per GB transfer and $0.0075 per 10,000 HTTP Requests. However, other CDNs don'...
DisgruntledGoat's user avatar
6 votes
7 answers
501 views

Looking for a CDN [duplicate]

Most of the CDN's that I've seen require you to upload your content in advance. I'm looking for a CDN that, upon receiving a request for a resource it hasn't seen, will contact my application server. ...
Bill's user avatar
  • 302
6 votes
2 answers
1k views

Tumblr disabled custom domain for using CloudFlare

I have a Tumblr blog which uses a custom domain. Yesterday I tried to add CloudFlare to it which was a terrible mistake. Apparently Tumblr does not support Cloudflare and will therefore disable ...
Tony Fire's user avatar
  • 273
6 votes
1 answer
13k views

HTTP Header Cache Time: s-maxage and max-age

I am setting up a CDN for my website, I found the following sample for adding to the 'httpd.conf' file, this is used to adjust the cache-time for client and CDN: ExpiresActive On ExpiresByType image/...
RRN's user avatar
  • 221
6 votes
2 answers
2k views

How does a CDN work on the tech side?

I never used a CDN before so this is a noob question, but how does it work on the tech side. For example right now when a user uploads an image on my site it is uploaded to the "/uploads" folder at ...
user avatar
6 votes
2 answers
1k views

CDN solutions pros and cons

As the sysadmin in our organization I've been asked to look into CDN solutions as we have plans to roll out a web platform that is targeted at developing countries. Here is my research so far on the ...
Max's user avatar
  • 967
6 votes
5 answers
4k views

If I am in the UK, does it matter if my web server is physically located in the USA?

I am located in the UK, and most of my clients are also in the UK. However. I find some of the products available in the US to be easier to use. I won’t name specific companies, but the price and ...
0xDonut's user avatar
  • 392
6 votes
2 answers
3k views

Is it possible to block cookies that are set by externally hosted content?

Is it possible to block cookies that are set by externally hosted content embedded in a page? For example if I embed an image from a CDN, the response for this image may contain a Set-Cookie header, ...
jamieweb's user avatar
  • 185
6 votes
3 answers
2k views

Does using a CDN such as Amazon Cloudfront save hosting bandwidth?

I have a site hosted on a shared server with limited bandwidth. Does using a CDN like cloud front minimise bandwidth usage on my hosting server?
Ethnic Code's user avatar
5 votes
5 answers
1k views

Is it ethical to use Google Analytics on a site crime victims use to make 'anonymous' reports?

Our local police force have a website for rape victims to use to report attacks anonymously. At the top of the page is a 'Report anonymously' link, which takes you to a page using Google Analytics as ...
Tom Brossman's user avatar
  • 2,291
5 votes
3 answers
9k views

Does CloudFlare cache videos, and would this wildcard Page Rule work for that?

I'm setting everything up in my website to use CloudFlare. This is my example: On videos.domain.com/Folder-A/Folder-B/ there are some HTML files that I would NOT like CloudFlare to cache. But inside ...
vagaerg's user avatar
  • 153
5 votes
2 answers
2k views

CDN for authenticated sites

We have a site that requires users to sign into. Typical stuff. Today, all the content (dynamic and static) is behind the login process, and you cannot access any of the pages or files via a URL ...
mohlsen's user avatar
  • 153
5 votes
1 answer
3k views

Costs of hosting static files on Google App Engine

I am considering using GAE as a kind of CDN, to host an entire static website. Soon they will start using new pricing. Does every site visitor start a frontend-instance? What will be the cost ...
user380448's user avatar
5 votes
2 answers
646 views

Concerns about moving media files to a CDN and impact on SEO

I'd like to move all my media files to a CDN (Windows Azure is my best choice for now). Two questions : How can I avoid SEO and redirections issues for the previously uploaded media files ? For the ...
Patouf's user avatar
  • 83
5 votes
2 answers
7k views

why is my site slower with amazons cdn?

so I have move most of the static objects to amazons Cloudfront CDN example: http://images.storyfollower.com/images/cycleOfStories.jpg which through cname point to the cdn Now I just ran a speed ...
user avatar
5 votes
1 answer
3k views

getting CDN images indexed with Google

I have somewhere close to 500,000 user-uploaded images hosted on a Cloudfront CDN -- separate from our main host (exampledomain.com). Up until this point, few of them have been getting indexed at the ...
Ian Spangler's user avatar
5 votes
1 answer
755 views

Is Cloudflare unzipping gzipped dynamic content?

I'm using Cloudflare for a small website that is frequently accessed from mobile phones where bandwidth usage is crucial. I used to gzip every php response and this reduced my bandwidth usage, however,...
tommybravo's user avatar
5 votes
0 answers
70 views

Increase in self-referrals in Google Analytics since implementation of CDN

Since the implementation of a CDN, my self-referrals have gone from being non-existent to thousands per day, the referral report in analytics with full referrer as a secondary dimension show that the ...
Collo's user avatar
  • 101
4 votes
3 answers
14k views

Cloudflare is it safe?

I am thinking of signing up with cloud flare, but since i'm not very familiar with the technical side of things, I wanted to ask here first. How safe is it to sign up with services, like cloud flare? ...
user1721135's user avatar
4 votes
2 answers
2k views

Do browsers recognize the same files served by different subdomains?

I have my website assets stored on Amazon S3 and served by CloudFront, from a separate domain name, to act as a cookie-less domain (so website.com for the website and websitestatic.com for static ...
Jim's user avatar
  • 43

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