Hello, Apache processing the request is very slow (approximately it takes 3 miuntes to respond) for some "user agent" For example :- Response is normal :- curl -i -v -H "User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:51.0)" <URL> curl -i -v -H "User-Agent: Gecko/20100101" <URL> Response is very slow (approximately 3 to 5 minutes): curl -i -v -H "User-Agent: Gecko/20100101 Firefox/51.0" <URL> curl -i -v -H "User-Agent: Firefox/51.0" <URL> Can you please help to resolve Thanks in advance