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| Middle-Tier Security |
Multicast Security
A multicast group communications protocol is used to communicate among middle-tier SAS applications in a single SAS deployment (the set of applications connected to the same SAS Metadata Server). During installation, the SAS Deployment Wizard supplies you with a default multicast address and port number that it generates based on the machine's (metadata server) IP address. The combination of multicast IP address and multicast UDP port should be different for each SAS deployment and also different from those used by other multicast applications at your site.
The IP address and multicast UDP port number for the multicast host must match the values in the Web application server's start-up script (for example, SASServer1.bat) and the environment.properties file located in the SAS-configuration-directory\Lev1\Web\Applications\RemoteServices directory.
The multicast group communication includes all information needed to bootstrap SAS middle-tier applications. Because this includes sending the SAS environment credentials (such as the sasadm account name and its password), scoping and encryption options are provided in the SAS Deployment Wizard. The defaults are most appropriate for deployments in the firewall, isolated data center environment. After installation, if you choose to modify the scoping or encryption options, you can do so by specifying the options for the -Dmulticast.security parameter for your Web application server.
For more information, see Administering Multicast Options.
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