I am having issues with the following server for the CDN: aspnet-scripts.telerikstatic.com
See attached Firebug screengrab showing the delay.
This happens consistently, and is getting very, very frustrating.
22 Answers, 1 is accepted
@Alex For how long have you been experiencing this slowness? Is there any improvement? These response times are really unusual and this may be a temporary problem with the edge server from which you are getting the resources.
@Paul It depends on the Internet connection in the areas where your site is hosted and accessed. It is possible to have better response times without the CDN for those locations if the connection is really good, however, in the rest of the cases CDN will provide better response times.
the Telerik team
Will let you know if the problem remains.
This is most probably an issue with the edge server, which you are hitting. As we do not have control over this and cannot fix it I suggest you disable CDN in your application.
the Telerik team
Has the official Telerik response changed?
The CDN servers use the DNS resolve request you make to determine your rough physical location and return the closest edge server that can handle the request. If you are using a public DNS service (e.g. Google public DNS, OpenDNS), then this resolution could take more time and take you to a server that is going to be far away and slow to respond.
Please check if you are using custom DNS server or if your ISP has had connection problems to the Amazon CloudFront CDN.
the Telerik team
We have several clients who have experienced this - specifically w/ http://aspnet-scripts.telerikstatic.com - and its gotten worse over the past 2 weeks.
Disabling CDN is problematic for several reasons - and I'm hoping I can get them some information that will explain these issues...
I am sorry to hear that some of your users are not having the best experience with the CDN provider.
We cannot, however, control the Amazon servers which are used to host it and the concrete client's network connectivity to these edge servers is what can cause issues.
What I can suggest is configuring your own CDN provider: http://www.telerik.com/help/aspnet-ajax/cdn-custom-provider.html.
I am afraid that we cannot control the Internet connectivity between two endpoints that are not in our internal network. You can contact your network administrators or ISP for assistance with troubleshooting such issues.
Such a feature will require research and what I can to at this point is to log it in our database for further examination. You can use the following link to leave your comments, vote and follow its progress: http://feedback.telerik.com/Project/108/Feedback/Details/57780. I have updated your Telerik points for sharing your ideas and feedback.
Haven't found a solution - either w/ Telerik or w/ individual service providers/network admins.
The CloudFront edge servers are very well connected to the internet and in general provide excellent speed around the globe. However, if it happens that you intranet goes through proxy servers or, as written earlier in this thread, if you are using a public DNS service (e.g. Google public DNS, OpenDNS), then this resolution could take more time and take you to a server that is going to be far away and slow to respond.
If this is the case it might be faster not to use CDN or use local CDN, as explained the custom CDN help article.
This download of the referenced aspnet-scripts.telerikstatic.com is really slow.
Are there any instructions for setting up local CDN using IIS Express? Doesn't seem to resolve the Scripts and Skins folder locations.
To be able to configure and use a local CDN you will need to use the full-blown IIS server since it is not possible to map virtual folders in IIS Express (at least it will be far easier in IIS than in IIS Express - if you are curious why check out this StackOverflow article -> Creating virtual directories in IIS express).
You can easily install IIS on your Windows 10 dev machine by following the instruction at https://teckangaroo.com/enable-iis-windows-10/.
For your convenience, I have recorded a very detailed video showing how to configure a local (custom) CDN for skin and script resources on your IIS server.
The video also shows how to debug the resources paths in the Network tab of the browser console to make sure that they are correct.
Please follow the video and let me know if you need any further help.
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