User-agent: AhrefsBot
Crawl-Delay: 28800
User-agent: SemrushBot
Disallow: /
User-agent: nbot
Disallow: /
User-agent: MJ12bot
Disallow: /
User-agent: *
Disallow: 
Disallow: /cgi-bin/
Disallow: /admin/
Disallow: /system/