Can anyone make protection / preventive measures for the site from parsing?

Question

Parsing

There is a site that displays my content online. Any new text appears there immediately. There is no content of its own, it displays only what it parses. Shit site. All in teasers. Yandex has AGS, but nevertheless the pages are indexed and my site suffers from this. and not only mine, it seems ...
He doesn’t need my information, it’s just visible from the issuance that he pulls out domains and parses so that another page appears on which you can hang a dozen or two teasers.
During the existence of my site - about 5 years, no one parsed, only this case. I want to know who could save me from this problem. That is, TK - getting rid of a specific parser, with some kind of guarantee for some time. Well, if possible, preventive measures for the site from such cases. I will provide details to those who respond.

Answer 1

I'm not very good at this ... I studied the logs, calculated the IP, blocked it, found the IP of the server, blocked it, but nothing helps even for a while. My knowledge is not enough to deal with this on my own. So I'm looking for help from the experts. I understand that there is no panacea, but protection from this particular case and others like it is needed.