Negative SEO : redirecting domains

[Jori]

I found a scheme. Someone is redirecting (301) entire domains to my website.

Some are pointing to my homepage, redirecting before that to an intemediary domain.
Others are pointing to a non existent page (404) of my website.

They have few backlinks pointing at them (directories). It's old domains (registered in 2005!).

Disavow the domains? It's not even backlinks, it's a redirect.

I can not trace right now since when it's pointing at me, but I got hit by core june update.

Do you guys have some inputs?

[Jori]

Some inputs more, as I'm investigating this.

They first redirect some domains to a "main" domain in 301 (I already detected 4, but I suspect many more...). This main domain will after that redirect in 302 to my website.

[not2easy]

I would not bother to disavow anything related to this, you did not set it up so you do not need to disavow. Google detects 301 and 302 redirects, it may take a week or more to get their attention but eventually it will disappear as their scheme is sorted. Yes, it is alarming but it is not so rare that Google does not catch it.

If this caused you any issues in the core update, those issues will be sorted, but it is possibly coincidental.