Hi, I have an old site where the prior owner has used k2 as plugin to build the site. Now we got an email from google with a manual action penalty because our site has about 300+... 404 erros, growing daily. We don't have any idea how to solve that issue. Url rewriting is activated and everything works properly except of this issue.

Attached a short excerpt of the url's that are generating the 404 errors:

http://imgur.com/RXARBxB

Any help appreciated,
best

Some-One

These are links to certain users' pages.
Someone is requesting these links, it could be perhaps spammers.

Hi krikor, thank you. And how can avoid that this site are getting indexed or how can I prevent that this this sites are getting generated by the k2 plugin?

br

By default in 2.7 these links are redirected to the homepage if the user has no items.
This could also be a ddos, it is worth looking into if someone is still requesting these links.