Если выше прописаны нужные инструкции для User-Agent: Yandex и User-Agent: Google, то обе ПС проигнорируют последнюю инструкцию, она будет предназначатся всем остальным роботам, кроме поисковых роботов Yandex и Google (а их до фиговой тучи). Скорее всего, именно всяким остальным зачем-то и закрыли.

Вот такой файл:


# If the Joomla site is installed within a folder such as at
# e.g. www.example.com/joomla/ the robots.txt file MUST be
# moved to the site root at e.g. www.example.com/robots.txt
# AND the joomla folder name MUST be prefixed to the disallowed
# path, e.g. the Disallow rule for the /administrator/ folder
# MUST be changed to read Disallow: /joomla/administrator/
#
# For more information about the robots.txt standard, see:
# www.robotstxt.org/orig.html
#
# For syntax checking, see:
# www.sxw.org.uk/computing/robots/check.html

User-agent: *
Disallow: /administrator/
Disallow: /cache/
Disallow: /cli/
Disallow: /components/
Disallow: /images/
Disallow: /includes/
Disallow: /installation/
Disallow: /language/
Disallow: /libraries/
Disallow: /logs/
Disallow: /media/
Disallow: /modules/
Disallow: /plugins/
Disallow: /templates/
Disallow: /tmp/

Disallow: /component/option,com_search/
Disallow: /component/option,com_newsfeeds/
Disallow: /component/option,com_wrapper/
Disallow: /component/option,com_bookmarks/
Disallow: /index.php?option=com_search

User-agent: AhrefsBot
Disallow: /

User-agent: Yandex
User-Agent: Googlebot
User-Agent: StackRambler
User-Agent: Aport
User-Agent: Webalta
User-Agent: Yahoo! Slurp
User-Agent: Googlebot
User-agent: BigmirSpider
User-agent: MetaSpider
User-agent: Slurp
User-agent: MSNbot
User-agent: Googlebot-Image
User-agent: Yahoo-MMCrawler

Crawl-delay: 20

User-Agent: *
Disallow: /