Invoking Anetd with the -s command-line switch explicitly forces Anetd to run in standalone mode. Anetd can also be implicitly put into standalone mode by running Anetd from an OS account that does not correspond to one of the ABone roles and not invoking it with the -a option to map it to one of those roles.
The following table attempts to make this clearer:
Command-line Argument | Example OS Account | Mode |
-s | *any* | standalone mode |
neither -s nor -a | user1234 | standalone mode |
neither -s nor -a | anpub | ABone mode |
-a anpub | user1234 | ABone mode |
For more information on the ABone and ABone node configuration, see the main ABone web site: http://www.isi.edu/abone/. See Sections 3.4 and 3.5 of this document for information on Anetd configuration and invocation.