Overview: Load Balancers

With a load balancer, you can maximize the data throughput and minimize the server load at the same time. Load balancers can determine both the load and the response time of each server and use rules to distribute the traffic across multiple servers.

Load balancers are useful if your web applications must be deployed from multiple servers and high availability must be ensured. For example, this applies to websites with high visitor numbers.

The following questions can help you decide whether you need a load balancer:

  • Do you need several servers for deploying your web applications?
  • Is it necessary to ensure high availability for your web applications?
  • Is there a high traffic volume?
tip Note:
You can also use multiple load balancers to ensure an optimal distribution of the traffic.

In the Network > Load Balancers section, all load balancers that you have configured are displayed in a table. This table lists the most important information for each load balancer:


  • Name: The name assigned to the load balancer. You can change it at any time.
  • Status: The current status of the load balancer.
    • Active: The load balancer is active.
    • Disabled: The load balancer is disabled.
    • Creating: The load balancer will be created. The progress is shown as a percentage.
    • Configuring: The configuration of the load balancer will be changed.
    • Deleting: The load balancer will be deleted.
  • Public IP: The IP address assigned to the load balancer.
  • Data center: 1&1 data center where the load balancer is hosted.

To display all data for a specific load balancer, click the name of the load balancer. The list includes the following additional information:


  • Description: The description of the load balancer. You can change the description at any time.
  • Configuration: List of the protocols, ports and IP addresses configured in the load balancer.
  • Assigned IP: Servers and IP addresses to which the traffic is distributed.
  • Health Check: Type of health check set
  • Persistence: Indicates whether the persistence has been activated. If you activate this option, all subsequent requests from a device are always redirected to the same server within the specified time period.
  • Balancing type: The balancing type set for the traffic distribution. Round Robin: Even distribution of traffic on all servers assigned to the load balancer.
    • Least Connections: Redirection of traffic to the servers that have to process less traffic at the moment.
  • Public IP: Public IP address of the load balancer.
  • Data center: 1&1 data center where the load balancer is hosted.
  • ID: ID of the load balancer.
  • Date of creation: The date on which the load balancer was set up.

To edit an element, click on the pencil.

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Tags: Load Balancer / Networking