DNS and Server move

M

Mark Roberts

Hi

I am planning on moving a couple of servers to a new location, and therefore
each server will have new IP addresses.

What I want to avoid as much as possible is downtime. There will be the
downtime while I physically move the servers, but I would like to limit the
issue with the DNS update causing longer downtime.

There is only the HTTP web service I need to ensure is limited in downtime,
so is it possible to forward all traffic from the old IP to the new IP, and
keep the host header data intact? This is because we have a couple of
hundred websites on virtual host headers on a couple of IP's. So
www.domain1.com and www.domain2.com on IP 123.123.123.123 relays the request
to the new IP 234.234.234.234 etc..

Any help is much appreciated

thanks

Mark
 
D

Deji Akomolafe

Will there still be a web server answering on 123.123.123.123 and doing the
redirection? If ys, then this would work. If I were doing it, I'd be
bringing down the TTL for all the web sites very very low BEFORE I actually
move the servers.

--


Sincerely,

Dèjì Akómöláfé, MCSE+M MCSA+M MCP+I
Microsoft MVP - Directory Services
www.readymaids.com - we know IT
www.akomolafe.com
Do you now realize that Today is the Tomorrow you were worried about
Yesterday? -anon
 
M

Mark Roberts

The problem is the servers are being physically moved from 1 datacentre to
another, and therefore will not have luxury of migration. I am going to be
bringing down the TTL, but was hoping to find a way of maybe proxying the
TCP requests from 1 IP to the new IP. So far not found anything that could
do this.

Mark
 
D

Deji Akomolafe

but was hoping to find a way of maybe proxying the TCP requests from 1 IP
to the new IP.

That's what I meant when I asked if there would be a web server at the old
address doing the redirect to the new address. If you have a box at the old
address, then you could add the 123.123.123.123 IP to the box, then create
redirections on that box to point to the original server at the new address.

--


Sincerely,

Dèjì Akómöláfé, MCSE+M MCSA+M MCP+I
Microsoft MVP - Directory Services
www.readymaids.com - we know IT
www.akomolafe.com
Do you now realize that Today is the Tomorrow you were worried about
Yesterday? -anon
 
M

Mark Roberts

I can put a machine in at the old location, and give it the old IP address
123.123.123.123, but how and using what can i do redirects to the new ip
234.234.234.234, keeping the headers in place so IIS can serve the right
site?

thanks for your help on this Deji
 
D

Deji Akomolafe

Sorry for the late response. The new server will run web services (IIS or
whatever). Then you will simply create a website on the new server (give the
web site the same name as the one you had on te original server). Create an
html like the one listed below:

<html>
<head>
<meta http-equiv="refresh" content="30;url=http://new.ip.add.ress/">
<title>
We have moved
</title>
</head>
<body>
We have just moved to a new, better home in order to be able to provide more
robust services to you, our loyal customers. <br>
We will now forward you to our new home in 30 seconds.<br>
Thank you
</body>
</html>

name this index.html or default.html or whatever the default doc for your
web site is called.

You can also do the redirection right from the website "home directory"
properties in IIS, but that is usually less friendly (chatty ;))
--


Sincerely,

Dèjì Akómöláfé, MCSE+M MCSA+M MCP+I
Microsoft MVP - Directory Services
www.readymaids.com - we know IT
www.akomolafe.com
Do you now realize that Today is the Tomorrow you were worried about
Yesterday? -anon
 

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