Google's www vs non-www duplicate content issues

Anyone seeing a correlation between this problem and IIS?

[oddsod]

It may be coincidence but over 90% of my sites/clients' sites (both long owned and recently bought) which are hosted on Windows servers seem to be affected by Google seeing the www and non-www as duplicate content. Less than 5% of our Apache hosted sites seem to display this problem (even though they lacked a 301 redirection of any sort).

My data is not sufficient on its own to draw a link. Anyone else noticing that Apache sites are less affected by this than sites on Windows servers?

OK, I've got redirects in place for all of them now and the Windows sites will come back but I wanted to see if anyone else saw a connection between the problem and Windows/IIS.

[goodroi]

It is an interesting idea. I'm not sure if it is accurate since I also had quite a few apache sites I needed to fix.

[oddsod]

Thanks for your reply goodroi.

I've had a few apache sites that needed fixing too but nowhere near like the number of Windows hosted sites.

The fact that thousands of big, well known sites (examples: alexa, hitachi etc) are sailing along without any redirect and no apparent ill-effect means that there is some factor/s that determines whether your records at the 'plex get mucked up or not. Does Windows play any part in that? I don't know. I was hoping for a few more replies though :) but it looks like this thread only just came out of pre-moderation.

[Dayo_UK]

Apache here too

However, Alexa was/is effected......

[google.com...]

Google knows the non-www homepage as it does not recognize it as the same as the www.

[oddsod]

Dayo, LOL. If I'm reading that correctly, you and I can go to [alexa.com...] but they banned the Googlebot for violating their TOS?

Anybody with more Windows sites affected than Apache sites?

[Dayo_UK]

Yep it appears it is banned just like Yahoo did to Googlebot. Poor Googlebot - you are welcome to visit my sites :)