Dear All, I am looking at the following situation. Company A is big and multinational. As a service to employees on the road it offers an application which uses a web browser as a front end and enforces access restriction by use of one time token cards and mandating that everything is kept (a little) secret by SSL. Company A now wants to improve resilliance. The have datacenters in three continents and so the basic idea is to put up three copies. Now the dns entry will point to one of them, if that fails then the contents of the dns will be changed (not by hand) to point at the secondary etc. Use a very short ttl on the dns entry and things should start again after a short while. Questions. Has anyone tried this before. If they did, did it work OK What is available to do the dns changing bit. Is this a good idea or are there better. Anyhow, I would just like to start a thread to discuss options for high availability for big organisations that have a big world wide internal network and multiple Internet access points in different countries. Thanks Lyndon David
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