Changing Services Mode

xinetd is a service used to start and stop a variety of data communication services. xinetd starts on the Parallels server startup and waits for a connection request from a remote client that wants to connect to the server. There can be a number of remote clients in the network, and each of them can use different network protocols to establish connection to the server. In order not to run all network services responsible for a specific protocol, which will negatively influence the system performance, the system starts only the xinetd service. This service controls all other network services and, at the connection time, it starts the corresponding service to process this connection. In such a way, xinetd saves system resources allowing you to run only those network services in the system that are really needed at the moment.

The vzsetxinetd utility allows you to switch Container services between the standalone and xinetd mode. The services that can be either standalone or dependent on xinetd are sendmail , sshd , proftpd , and courier-imap . Whereas they are xinetd -dependent by default, in order to consume less resources, you may want to make them standalone due to the following reasons:

• The CPanel application does not recognize sshd if it is dependent on xinetd ;
• sendmail does not process some rules correctly if it is dependent on xinetd ;
• A number of control panel applications and some others are not able to manage xinetd -based services at all.

The courier-imapd , courier-imapds , courier-pop3d , and courier-pop3ds services are provided by the courier-imap service, thus vzsetxinetd can manage these services via the courier-imap service.

Let us assume that you wish to check the mode of the sendmail service and set it to standalone if it is in the xinetd mode. First, you should check the current status of the sendmail service. To this effect, type the following command in the command line:

# vzsetxinetd -s 222 sendmail

where 222 is the Container ID, sendmail denotes the name of the corresponding service, and the -s option gets the status of the sendmail service of the Container with ID 222. The output will tell you if this service has the standalone or xinetd mode:

sendmail is xinetd service

In our case it is in the xinetd mode. Now you can change the mode of the sendmail service to standalone. To make it standalone, type the following line:

# vzsetxinetd 222 sendmail off

sendmail is standalone service

where off specifies that the sendmail service should be set to the standalone mode. The output confirms that the sendmail service is now standalone.

For more information on the vzsetxinetd utility, consult the corresponding man pages or refer to the Parallels Command Line Reference Guide .

Notes:

1. You cannot use the vzsetxinetd utility to change the mode of the xinetd -dependent services in Containers where the Debian 3.0 OS template is installed.

2. In the current version of Parallels Server Bare Metal, you cannot use the vzsetxinetd utility for managing services in virtual machines.