Access to Plesk server from some IP's is restricted;
- Sites are showing ERR_CONNECTION_TIMED_OUT
Plesk Firewall has no blocking rules with affected IP addresses.
Imunify360 extension is installed on the server.
There are the ipsets like below with the affected IP addresses:
# ipset list i360.ipv4.graylist| grep 203.0.113
203.0.113.1 timeout 1216260
203.0.113.2 timeout 4292132
imunify360-agent graylist blocks the IPs.
Allow the required IP's in the Imunify360 via Plesk:
Go to Extensions > Imunify360 and allow the mentioned IP addresses.
Or add the IP address to whitelist via CLI:
Connect to the server via SSH;
- Remove the IP addresses from the Imunify360 graylist:
# imunify360-agent graylist ip delete 203.0.113.1
# imunify360-agent graylist ip delete 203.0.113.2
Whitelist for Imunify360 the IP addresses:
# imunify360-agent whitelist ip add 203.0.113.1
# imunify360-agent whitelist ip add 203.0.113.2