Moving web server to new IP

[Simon <greminn@gmail.com>]

Hi There,

I know this is strictly not a debian question, but i will be using
debian todo it!

I need to move our web server to a new IP range. This is hosting
around 300 websites, about 250 on 2-3 IPS (standard name based virtual
hosts) and the rest on their own IPs (SSL hosts). All running on
apache/php/mysql.

Im wondering how i can achieve this over a period of a week rather
than all in one go.

My thoughts are to set up some sort of proxy to proxy the requests
from one IP range to another. But, this would result in wierd hit
stats (coming from the proxy IP rather than the client IP - i think).

Im wondering if this could be done with netfilter somehow? or some other way?

Moving mail and DNS is easy as i can use pedrition for the mail proxey
and just run dual name servers until they are sorted as they are low
overhead anyway.

Any input is appreciated.

Simon