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What are the exact steps I need to take in order to successfully change my ISP?  I want to have a minimum amount of downtime as possible for www site and email.

Posted on 2007-03-19
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Last Modified: 2012-05-05
We are a medium size business and we are changing our ISP.  We host a couple of our own websites and we have an exchange server.  What do I have to do to prepare for the cut-over to the new ISP?
What are the exact steps I need to take in order to successfully change my ISP?  I want to have a minimum amount of downtime as possible for www site and email.  
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Question by:anthonyca
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AdamRobinson earned 500 total points
ID: 18750917
If you are not maintaining the same IP address on the switchover, you will want to make sure that all of your records (A, MX, PTR) are pointing to the correct (new) location.  

If you have multiple sites linked together in any way, you will want to make sure that each site knows the new IP address in order to properly route information throughout your domain.

You will want to make sure you know your new ISPs correct DNS servers, and make your changes accordingly, depending on your server OS.  

You will want to be sure all of your clients are properly receiving the correct networking information if you aren't currently pointing them to another server which resolves outside DNS, as if you don't and they have external DNS servers configured, they may end up unable to access the internet.

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by:anthonyca
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Do you have a check-list put together for this?  Are you sure that's all I need to look at?
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