This configuration directive allows you to limit outbound TrackBacks and TrackBack auto-discovery for the purposes of keeping your installation private.

Possible values include:

• any (default) - Allows all regardless of destination
• off - Prevents all regardless of destination
• local - Allows only those requests/pings sent to weblogs within the same installation as the blog which initiated the action
• selected - Allows all to one or more domains specified by the OutboundTrackbackDomains setting.

This option is the configuration file counterpart to the settings found on System Overview » Settings.