Configuring bandwidth management
Article Number: 1334 | Last Updated: Thu, Dec 22, 2016 10:30 AM
Kerio Control includes bandwidth management, which regulates network traffic to ensure reliability of essential services, and avoid congestion.
The bandwidth management feature provides two basic functions:
Internet links speed
For correct bandwidth management, you need to assign a link speed to each Internet interface.
To ensure effective bandwidth management to be most effective, a conservative link speed estimate is best: approximately 80% of the actual speed.
Example: For an ADSL line with a declared 8192/512 Kbit/s, set the download speed to 6250 Kbit/s and the upload speed to 400 Kbit/s.
Configuring bandwidth management rules
Limiting bandwidth for Alex Smith
Suppose you want to restrict user Alex Smith to 50% of the link for download in all interfaces during his working hours:
The order of rules is important. Rules are processed from the top.
Alex Smith can use max. 50% of the link in all interfaces during the work hours. Downloading is slower now for Alex.
You can create similar rule for whole user group. Kerio Control applies the limit on all users added to the rule together. It doesn't matter if you add users to the rule separately or in user groups.
Reserving bandwidth for sales and support departments
Suppose you want to reserve 20 Mbit/s for sales and support departments in all interfaces, because they need to communicate with customers with a company on-line portal:
From now on, all users from the support and sales department have reserved 20 Mbit/s for communication with their customers. Kerio Control applies the limit on all users added to the rule together. It doesn't matter if you add users to the rule separately or in user groups.
Traffic types used in bandwidth management
You can apply limiting or reserving bandwidth to different types of traffic. You can select them in the Traffic column:
Bandwidth management and VPN tunnels
When you are using bandwidth management and VPN tunnels at the same time, select Use rules for VPN tunnels before encrypting. Otherwise your VPN tunnel encrypts the communication, and bandwidth management rules are not applied.
This option is available in Kerio Control 8.3 and newer. In a new installation, the option is selected by default. If you do not have a good reason to do so, do not change the settings. In an upgrade installation, the option is not selected and you can check it. However, bandwidth management of your Kerio Control will be influenced by that change.