How to avoid duplicate content from session idīs

[TomH27]

hi folks:

my qustion:
Im using a session system. Every user gets his own sid...
nNw i found hundreds of double content sites like:
www.foo.bar/index.php?sid?12121 of my site in Googleīs Index.

How can I avoid this problem?

Thanks, Tom

[g1smd]

You must find a way to avoid this duplicate content.

One way is to only use sessions for users that have already logged in. Bots cannot log in. This isn't a sure-fire method because your users could still copy URLs with sessions in them and place them on other sites, as links to your site, where the bots will still be able to find them.