# Services module

Services contains information about master and agent services. This module also allows configuration of master and agent.

- Master allows starting or stopping the vsmserver service, and modifying a subset of the configuration options.

- Agent allows starting or stopping the vsmagent service, and modifying a subset of the configuration options.

## Master

On this page you can start or stop the master service. There are also a subset of configuration options available for configuration of the service.

- Service status gives you the ability to start or stop the master service.

- Sessions per user allows you to configure how many sessions are allowed per user.

  A value of zero means no limit and will give unlimited sessions per user.

- Allowed groups allows you to configure which groups should be given access to connect to ThinLinc.

  If no groups are specified, all users will have access to connect to ThinLinc

- Allowed shadowers allows you to configure which users should be able to shadow other ThinLinc sessions.

Click the Save button when you want to save your changes to the configuration files. You need to restart the service to apply saved changes. A toast will be shown after saving, facilitating a service restart.

## Agent

On this page you can start or stop the agent service. There are also a subset of configuration options available for configuration of the service.

- Service status gives you the ability to start or stop the agent service.

- Externally reachable address to use allows you to configure the hostname that clients are redirected to.

  Note

  This configuration is needed if running ThinLinc in a NAT environment. See ThinLinc in a NAT/split-DNS environment for more information.

- Extra arguments to X server allows you to configure additional arguments to the X server (Xvnc) for new sessions that are started.

Click the Save button when you want to save your changes to the configuration files. You need to restart the service to apply saved changes. A toast will be shown after saving, facilitating a service restart.