| 1. | 51 | la-maint IMP Logical Address Maintenance |
| 2. | 510 | fcp FirstClass Protocol |
| 3. | 5101 | talarian-tcp Talarian_TCP |
| 4. | 5102-5136 | Unassigned |
| 5. | 511 | passgo PassGo |
| 6. | 512 | exec remote process execution; authentication performed using passwords and UNIX login names |
| 7. | 513 | login remote login a la telnet; automatic authentication performed based on priviledged port numbers and distributed data bases which identify authentication domains |
| 8. | 5137 | ctsd MyCTS server port |
| 9. | 5138-5144 | Unassigned |
| 10. | 514 | shell cmd; like exec, but automatic authentication is performed as for login server |