Unable to access Plesk and websites from the particular IP address when Imunify360 extension is installed: ERR_CONNECTION_TIMED_OUT

Symptoms

• Unable to access Plesk and websites from the particular IP address 203.0.113.2 with the error below:

  ERR_CONNECTION_TIMED_OUT 

• The Imunify360 extension is installed in Plesk > Extensions > My extensions.  

Cause

The 203.0.113.2 IP address is graylisted(blocked) by Imunify360 extension.

Resolution

1. Log into Plesk.
2. Go to Extensions > My Extensions > Imunify360 > Open > Firewall > Gray List.
3. Select the 203.0.113.2 IP address and press the highlighted button as on the screenshot below to remove it from the Imunify360 graylist: