| Protocol | ID | DPI version | Protocol group | Protocol type | Update | Description |
|---|
| efs | 520 | 12.2 | Network services | Built-in | As needed | A protocol for EFS (Extended File System), extending file system access over networks. |
| router | 520 | 12.2 | Network services | Built-in | As needed | Router protocol generic telemetry for routing systems, table updates, and peer sync. |
| ripng | 521 | 12.2 | Network services | Built-in | As needed | Routing Information Protocol next generation (RIPng) for IPv6-based routing updates. |
| ulp | 522 | 12.2 | Network services | Built-in | As needed | Unlicensed LTE Protocol supports control sync in private wireless deployments. |
| ibm-db2 | 523 | 12.2 | Application servers | Built-in | As needed | IBM-DB2 protocol handles secure communication between clients and IBM DB2 databases. |
| ncp | 524 | 12.2 | Network services | Built-in | As needed | NetWare Core Protocol used for file, print, and directory services in Novell networks. |
| timed | 525 | 12.2 | Debugging and measurement | Built-in | As needed | Timed protocol synchronizes clocks in Berkeley Unix environments. |
| tempo | 526 | 12.2 | Debugging and measurement | Built-in | As needed | Tempo protocol synchronizes timing signals in music production and multimedia systems. |
| stx | 527 | 12.2 | Transactions, banking, trading | Built-in | As needed | STX (Secure Transaction Exchange) is used for secure message transport in financial systems. |
| custix | 528 | 12.2 | Transactions, banking, trading | Built-in | As needed | Custix is a customer transaction indexing service used in CRM and financial data processing. |
| irc-serv | 529 | 12.2 | Remote control | Built-in | As needed | Internet Relay Chat (IRC) server management. |
| courier | 530 | 12.2 | Remote control | Built-in | As needed | Mail transfer agent for handling email delivery. |
| conference | 531 | 12.2 | Instant messengers | Built-in | As needed | Conference protocol manages secure group chat and call session state in collaboration tools. |
| netnews | 532 | 12.2 | E-Mail | Built-in | As needed | NetNews (NNTP) provides access to newsgroups over the network with article retrieval and posting. |
| netwall | 533 | 12.2 | Network services | Built-in | As needed | NetWall secures perimeter data transfer between air-gapped or segmented systems. |
| windream | 534 | 12.2 | Application servers | Built-in | As needed | Windream protocol is used for document management and encrypted content workflows. |
| iiop | 535 | 12.2 | Network services | Built-in | As needed | A protocol for IIOP (Internet Inter-ORB Protocol), enabling CORBA communication. |
| opalis-rdv | 536 | 12.2 | Network services | Built-in | As needed | Opalis-RDV enables remote orchestration messaging for Microsoft System Center Orchestrator. |
| nmsp | 537 | 12.2 | Video, pictures | Built-in | As needed | NMSP (Network Media Streaming Protocol) is used in Cisco-based platforms for encrypted video/audio transmission. |
| gdomap | 538 | 12.2 | Network services | Built-in | As needed | GNUstep Distributed Object Mapping protocol for service location in distributed apps. |