When the MaxConnectionsIP limit is reached, some users won't be able to log in to the webmail or Outlook, and the following message will appear in the Security logs:
HTTP connection from IP address 192.168.x.x rejected: too many simultaneous connections (101 connections, limit 100)
The default limit is 100 per IP address. You may need a higher limit if you are using shared public IP for the Company office or having a large number of users.
Administrator (root) access to the Kerio Connect server
Multiple Email-client connections are being transferred from a single IP address.
Navigate to your Kerio MailServer folder, default paths are below:
mailserver.cfgfile, and locate the table names
service-https.Note: For other Kerio Connect services, the tables would be:
Edit the variable
MaxConnectionsIPfrom the default number to a suitable value for your environment under both tables.Note: The safe limit, according to our Infrastructure and Development teams, is 600. But the value might be smaller depending on your Company Infrastructure.
Save the changes and start Kerio Connect.