Aspx filters causing duplicate content issues

[travelinnovations]

A client has a url which is duplicated by filters on the page, for example: -

http://www.example.co.uk/Home/example.aspx

is duplicated by

http://www.example.co.uk/Home/example.aspx?filter=3

The client is moving to a new website later this year and is using an out-of-date Kentico CMS which would need some development doing to it in order to enable implementation of rel canonical tags in the header, I don't have access to the server and they have to pay through the nose everytime they want the slightest thing altering.

I am trying to resolve this duplicate content issue though and am wondering what is the best way to resolve it in the short term.  The client is happy to remove the filter links from the page but that still leaves the filter urls in Google.  I am concerned that a 301 redirect will cause a loop and don't understand the behaviour of this type of code enough.

I hope this makes sense, any advice appreciated.

[seomasterbrasil]

Hello Alan!

DON'T use the 301 redirect in this case, because you will certainly create a loop, and then nobody will access the filtered page.

I am optimizing a e-commerce site, that has some duplicated content too.

We are trying just now to use some canonical, and it looks it's going well.

I think that this time your client should pay for, it will surely worth it.

You could also use some meta robots in this case. It can be complementary just with the canonicals. 

Here is a good and quick explanation: http://www.robotstxt.org/meta.html 

Hope it helps!

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