![]() ![]() You have been logged on using cached account information. If a domain controller is unavailable and a user's logon information is cached, the user will be prompted with a dialog that says:Ī domain controller for your domain could not be contacted. Windows caches previous users' logon information locally so that they can log on if a logon server is unavailable during later logon attempts. ![]() If something goes wrong and you release the 301 redirection to the production, your client’s browsers permanently cache this redirection and you will have to tell all the clients to clear the browser cache.This article describes how cached domain logon information works and how to control cached logon information.Īpplies to: Windows 7 Service Pack 1, Windows Server 2012 R2 Original KB number: 172931 Summary □ How really dangerous is the 301 in production? It is very simple. So the 302 is not hard cached by the browser and you have the ability to access the old version if you remove the redirection from your server (website). Even if you remove the redirection from the server, your browser continuously redirects the resources to the new domain or HTTPS, because of the hard cache. The client/browser should not attempt to request the original location but use the new location from now on.ģ02 - means that the resource is temporarily located somewhere else, and the client/browser should continue requesting the original URL. □ The definition of 301 and 302 redirections:ģ01 - means that the resource (page) is moved permanently to a new location. Then, and ONLY then, change the 302 redirection 301. □ How to avoid that? Use the 302 redirection as long as everything works as it should. If you redirect from the old domain to the new domain with the 301 redirection, browser caches it too, and prevent’s you to enter the old domain. □ The second example is when you changing the website domain. Browser caches the 301 redirection and redirects you to HTTPS. □ For example, when you configure the SSL certificate and make the 301 redirection from HTTP to HTTPS, but something goes wrong, you don’t have the ability to enter the HTTP version again. I had facing it very often until I learn the lesson… I hope it helps you and you learn something from me, not from your mistakes □ I think many web developers and server administrators had been facing the 301 redirection cache. ![]()
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