Why is my Mac listening on port 625?
Anything running it should be within this scope.


dec_dlm - DEC DLMIANA - ipcserver
Mac OS X RPC-based services. Used by NetInfo, for example.
Appledec_dlm - Directory Service Proxy (DSProxy) (Unregistered Use). DirectoryService, Open Directory Assistant, Workgroup Manager. Note: This port is registered to DEC DLM.
Source: http://www.adminsub.net/tcp-udp-port-finder/625


If it is not one of the following, try reading into the launchd docs that some really nice person made. To see all launchd events, open terminal, and paste this launchctl list if that doesn't help, type sudo launchctl list to see what the root user is launching.