How do i change dcom settings

You can also remove users from the list. When setting access permissions, you must ensure that SYSTEM is included in the list of users that are granted access. The process of setting access permissions for a machine is similar to setting launch permissions.

The following steps should be taken. The impersonation level, set by the client, determines the amount of authority given to the server to act on the client's behalf.

For example, when the client has set its impersonation level to delegate, the server can access local and remote resources as the client, and the server can cloak over multiple machine boundaries if the cloaking capability is set.

When you enable reference tracking, you are asking COM to do additional security checks and to keep track of information that will keep objects from being released too early. Keep in mind that these additional checks are expensive. Use the following steps to enable or disable reference tracking. You can disable DCOM for a particular computer, but doing so will disable all communication between objects on that computer and objects on other computers.

COM still looks for launch permissions that you have specified. If no launch permissions have been specified, default launch permissions are used.

Even if you disable DCOM, if a user has physical access to the computer, they could launch a server on the computer unless you set launch permissions not to allow it. To re-enable DCOM, you will need physical access to that computer.

You might want to enable security for a particular application if an application has security needs that are different from those required by other applications on the machine. For instance, you might decide to use machine-wide settings for your applications that require a low level of security while setting a higher level of security for a particular application.

However, security settings in the registry that apply to a particular application are sometimes not used. For example, the application-wide settings that you set in the registry using Dcomcnfg. When enabling security for an application, several settings may need to be modified.

These include authentication level, location, launch permissions, access permissions, and identity. For step-by-step procedures, see the following topics in this section:. To enable security for an application, you must set an authentication level other than None. The authentication level tells COM how much authentication protection is required, and it can range from authenticating the client at the first method call to encrypting parameter states fully. The location you set for your application determines the computer on which the application will run.

You can choose to run your application on the machine where the data is located, on the machine you use to set the location, or on a specified machine. With Dcomcnfg.

The process of setting access permissions for an application is similar to setting launch permissions. The steps are as follows. An application's identity is the account that is used to run the application. The identity can be that of the user that is currently logged on the interactive user , the user account of the client process that launched the server, a specified user, or a service.

You can use Dcomcnfg. You would browse the user database in Dcomcnfg. For instance, you can browse the user database to locate a user that you want to add for access or launch permissions.

If there is a Windows NT or Windows domain, both Windows 95 and Windows 98 can provide authentication and authorization using a pass-through security mechanism.

However, if there is no Windows NT or Windows domain in the network, only unsecure calls can be made. To change this behavior, the following tasks must be completed:. Thus both the client and server have to set the authentication level to the lowest value allowable for any call in any direction. Similarly, if you have two processes, one with a logon token and the other with an impersonation token, and you set the authentication level to none in the second, it still won't be able to call the first if its authentication level is not none.

Data Recovery. Data Utility. Data Security. Data Backup. LSoft Technologies Inc. Toggle navigation. See also for versions: 9. Security Introduction The Component Object Model COM can make distributed applications secure without any security-specific coding or design in either the client or the component.

By default, distributed components are enabled. Configure the location of an application. Set permissions on server applications, either for all applications or for individual applications. Configure the user account that will be used to execute the server application. The client application uses this account to start processes and gain access to resources on the server computer.

Configure the level of security for connections between applications, for example, using packet encryption. On the computer that will be running the client application, the administrator must specify the location of the server application.

When a COM client application is used, it makes a request to a server application, which could be running on a different computer. Server Application. On the computer that will be running the server application, the administrator must specify the user accounts that will have permission to use or start the server application.

In addition, it is necessary to specify the user accounts that will be used to run the server application. Default Security You can use the Default Security tab to specify default permissions for objects on the system.

The Default Properties tab Applications You can change the settings for a particular object from the Applications tab. The Applications tab The Object Properties dialog box has four tabs: The General tab confirms the application you are working with. The Location tab specifies where the application should run when a client creates the instance of server application.

The Security tab is similar to the Default Security tab found in the Distributed COM Configuration Properties dialog box, except that these settings apply only to the current application. The Identity tab identifies which user is used to run the application. To set the authentication level on a machine-wide basis: Run Dcomcnfg. Choose the Default Properties tab.

From the Default Authentication Level list box, choose a value other than None. If you will be setting more properties for the machine, click the Apply button to apply the new authentication level. Otherwise, click OK to apply the changes and exit Dcomcnfg. To set launch permissions for a machine: On the Default Security property page in Dcomcnfg. To remove users or groups, select the user or group you want to remove and choose the Remove button. The selected user or group will no longer appear in the list box.

When you have finished removing users and groups, choose OK. If you want to add a user or group, choose the Add button.

If you know the fully qualified user name you want to add, type it in the Add Names text box. If you do not know the user name, you can browse the user database to find it. When you have located the user name, select the user or group from the Names list box and choose the Add button. To add other users that will also have the selected type of access, repeat step 4.

When you have finished adding users for the selected access type, choose the OK button. To add users that will have a different type of access, repeat steps 4 and 5. Otherwise, choose OK to apply the changes. The impersonation level, set by the client, determines the amount of authority given to the server to act on the client's behalf. For example, when the client has set its impersonation level to delegate, the server can access local and remote resources as the client, and the server can cloak over multiple computer boundaries if the cloaking capability is set.

To help determine which impersonation level you should choose, see Impersonation Levels and Cloaking. Setting the default impersonation level for the whole computer tells COM what impersonation level to use when a particular client on the computer does not specify an impersonation level programmatically by using CoInitializeSecurity or CoSetProxyBlanket.

From the Default Impersonation Level list box, choose the impersonation level you want. If you will be setting more properties for the computer, choose the Apply button to apply the new impersonation level. Otherwise, choose OK to apply the changes and exit Dcomcnfg. When you enable reference tracking, you are asking COM to do additional security checks and to keep track of information that will keep objects from being released too early.

Keep in mind that these additional checks are expensive. For more information about reference tracking, see Reference Tracking. Use the following steps to enable or disable reference tracking. To enable or disable reference tracking, select or clear the Provide additional security for reference tracking check box near the bottom of the page. If you will be setting more properties for the computer, choose the Apply button to apply the new setting.

You can disable DCOM for a particular computer, but doing so will disable all communication between objects on that computer and objects on other computers. COM still looks for launch permissions that you have specified. If no launch permissions have been specified, default launch permissions are used. Even if you disable DCOM, if a user has physical access to the computer, they could launch a server on the computer unless you set launch permissions not to allow it.

To re-enable DCOM, you will need physical access to that computer. If you will be setting more properties for the computer, click the Apply button to enable or disable DCOM.

Setting Process-wide Security. Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. To set the authentication level on a system-wide basis Run Dcomcnfg. Choose the Default Properties tab. To set launch permissions for a computer On the Default Security property page in Dcomcnfg.

If you want to add a user or group, choose the Add button. To set access permissions for a computer On the Default Security property page in Dcomcnfg. If you want to add a user or a group, choose the Add button. Setting System-Wide Impersonation Level The impersonation level, set by the client, determines the amount of authority given to the server to act on the client's behalf.

To set the impersonation level for a computer With Dcomcnfg. Setting System-Wide Reference Tracking When you enable reference tracking, you are asking COM to do additional security checks and to keep track of information that will keep objects from being released too early.

To set reference tracking for a computer With Dcomcnfg. Is this page helpful? Yes No. Any additional feedback?