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From "Joshua Slive" <>
Subject RE: Client IP changes after mod_rewrite [R]
Date Thu, 20 Dec 2001 01:15:05 GMT

> From: Albert Jagnow []

> You will notice that the ip address for the first request does not match
> the ip address for the request after the redirect.  The user reported
> that when they entered the url nothing
> happened. I checked the log files back to the start of the month and saw
> this same thing 50 or so other times. I am wondering are all these users
> having this same problem or is this client ip switch on a redirect a
> common thing with ISPs like MSN, AOL, and @home, which is where the
> other requests seemed to come from?  Is this particular problem
> something with the users machine/ISP or something I can fix on my
> server?  Could someone explain to me what is going on here or point me
> in the right direction to figure this out?

Yes, there are several major ISPs that use load-sharing proxies such that
two "nearby" requests might come from different proxy servers.  You can't
count on all requests coming from the same IP.  They should still follow the
redirect, unless their proxy servers have a problem.


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