Try cloudflare. It's can use for invalid traffic and site protection. It's free.
Robots.txt can help you only. Pugin might block traffic. If you need Effective results adjust Robots.txt file for website.
Google Robots.txt generator.What exactly does it mean to modify robots.txt?
Google Robots.txt generator.
Yes in that case your Cloudflare.com Its free. It also has protection from DdosI'm not a specific IP attack, an unspecified number of people visit.
Yes in that case your Cloudflare.com Its free. It also has protection from Ddos
Yes sure..Can I block invalid traffic with the free version of cloud flare?
Yes sure..
PLease go here: https://support.cloudflare.com/hc/en-us/articles/360021801151-Getting-Started-with-Cloudflare-DNSI lack a lot of knowledge, so could you explain it in more detail?