Issue Google Pagespeed Insights: Timeout during DNS Search Execution - AFTER some changes to Apache

[MakisD]

Good morning.
I have an issue with Google Pagespeed Insights after a change i had done to Apache.
I wanted to turn KeepAlive On - after suggestion of GTmetrics.

Reading that:
Virtual Host Configuration Files
and that:
Enable Keep-Alive | GTmetrix

i entered the field:
Apache & nginx Settings
and written the line: "KeepAlive ON" in both fields of
Additional Apache directives (Additional directives for HTTP & Additional directives for HTTPS).

The GTmetrix gave me a good score but Google Pagespeed Insights game me the message:
"Timeout during DNS Search Execution. Make sure the page is loading in a browser and try again."

The page is running normally but i have no access any more to Google Pagespeed Insights, not at the plugin, nor at the native page.

I tried to change the line "KeepAlive ON" in "KeepAlive OFF". Nothing changed.

I tried to follow this - witch seamed to me relevant to my problem:
Группы Google
adding the line: "HostnameLookups Off" at the same place. Nothing changed.

Finally i deleted both lines of both fields. The problem is still there.
Google Pagespeed Insights cant see my page giving the same message: "Timeout during DNS Search Execution. Make sure the page is loading in a browser and try again." - translation from Greek.

Can someone suggest me something? I fell that a website that can't be analyzed from Google is as it doesn't exist.

 

[virtubox]

Hello,

you cannot change settings like KeepAlive or HostnameLookups from the Plesk interface. You have to edit them via ssh in :
/etc/apache2/apache2.conf on debian/ubuntu
/etc/httpd/conf/httpd.conf on Centos