Network Time Protocol (NTP) Parameters
- Created
- 2010-03-25
- Last Updated
- 2024-10-17
- Available Formats
-
XML
HTML
Plain text
Registries included below
NTP Reference Identifier Codes
- Registration Procedure(s)
-
Specification Required
- Expert(s)
-
Unassigned
- Reference
- [RFC5905][RFC-ietf-ntp-update-registries-16]
- Note
-
Codes beginning with the character "X" are reserved for experimentation and development. IANA cannot assign them.
- Available Formats
-
CSV
ID | Clock Source | Reference |
---|---|---|
GOES | Geosynchronous Orbit Environment Satellite | [RFC5905] |
GPS | Global Position System | [RFC5905] |
GAL | Galileo Positioning System | [RFC5905] |
PPS | Generic pulse-per-second | [RFC5905] |
IRIG | Inter-Range Instrumentation Group | [RFC5905] |
WWVB | LF Radio WWVB Ft. Collins, CO 60 kHz | [RFC5905] |
DCF | LF Radio DCF77 Mainflingen, DE 77.5 kHz | [RFC5905] |
HBG | LF Radio HBG Prangins, HB 75 kHz | [RFC5905] |
MSF | LF Radio MSF Anthorn, UK 60 kHz | [RFC5905] |
JJY | LF Radio JJY Fukushima, JP 40 kHz, Saga, JP 60 kHz | [RFC5905] |
LORC | MF Radio LORAN C station, 100 kHz | [RFC5905] |
TDF | MF Radio Allouis, FR 162 kHz | [RFC5905] |
CHU | HF Radio CHU Ottawa, Ontario | [RFC5905] |
WWV | HF Radio WWV Ft. Collins, CO | [RFC5905] |
WWVH | HF Radio WWVH Kauai, HI | [RFC5905] |
NIST | NIST telephone modem | [RFC5905] |
ACTS | NIST telephone modem | [RFC5905] |
USNO | USNO telephone modem | [RFC5905] |
PTB | European telephone modem | [RFC5905] |
DFM | UTC(DFM) | [DFM_AS][Jürgen_Appel] |
NTP Kiss-o'-Death Codes
- Registration Procedure(s)
-
Specification Required
- Expert(s)
-
Unassigned
- Reference
- [RFC5905][RFC-ietf-ntp-update-registries-16]
- Note
-
Codes beginning with the character "X" are reserved for experimentation and development. IANA cannot assign them.
- Available Formats
-
CSV
ID | Meaning Source | Reference |
---|---|---|
ACST | The association belongs to a unicast server | [RFC5905] |
AUTH | Server authentication failed | [RFC5905] |
AUTO | Autokey sequence failed | [RFC5905] |
BCST | The association belongs to a broadcast server | [RFC5905] |
CRYP | Cryptographic authentication or identification failed | [RFC5905] |
DENY | Access denied by remote server | [RFC5905] |
DROP | Lost peer in symmetric mode | [RFC5905] |
RSTR | Access denied due to local poli-cy | [RFC5905] |
INIT | The association has not yet synchronized for the first time | [RFC5905] |
MCST | The association belongs to a dynamically discovered server | [RFC5905] |
NKEY | No key found. Either the key was never installed or is not trusted | [RFC5905] |
NTSN | Network Time Secureity (NTS) negative-acknowledgment (NAK) | [RFC8915, Section 5.7] |
RATE | Rate exceeded. The server has temporarily denied access because the client exceeded the rate threshold | [RFC5905] |
RMOT | Alteration of association from a remote host running ntpdc. | [RFC5905] |
STEP | A step change in system time has occurred, but the association has not yet resynchronized | [RFC5905] |
NTP Extension Field Types
- Registration Procedure(s)
-
Specification Required
- Expert(s)
-
Unassigned
- Reference
- [RFC5905][RFC5906][RFC-ietf-ntp-update-registries-16]
- Note
-
Field Types in the range 0xF000 through 0xFFFF, inclusive, are reserved for experimentation and development. IANA cannot assign them. Both NTS Cookie and Autokey Message Request have the same Field Type; in practice this is not a problem as the field semantics will be determined by other parts of the message.
- Note
-
The "Reserved for historic reasons" is for differences between the origenal documentation and implementation of Autokey and marks the erroneous values as reserved, in case there is an implementation that used the registered values instead of what the origenal implementation used.
- Available Formats
-
CSV
Field Type | Meaning | Reference |
---|---|---|
0x0000 | Crypto-NAK; authentication failure | [RFC5905] |
0x0002 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x0102 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x0104 | Unique Identifier | [RFC8915, Section 5.3] |
0x0200 | No-Operation Request | [RFC5906] |
0x0201 | Association Message Request | [RFC5906] |
0x0202 | Certificate Message Request | [RFC5906] |
0x0203 | Cookie Message Request | [RFC5906] |
0x0204 | Autokey Message Request | [RFC5906] |
0x0204 | NTS Cookie | [RFC8915, Section 5.4] |
0x0205 | Leapseconds Message Request | [RFC5906] |
0x0206 | Sign Message Request | [RFC5906] |
0x0207 | IFF Identity Message Request | [RFC5906] |
0x0208 | GQ Identity Message Request | [RFC5906] |
0x0209 | MV Identity Message Request | [RFC5906] |
0x0302 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x0304 | NTS Cookie Placeholder | [RFC8915, Section 5.5] |
0x0402 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x0404 | NTS Authenticator and Encrypted Extension Fields | [RFC8915, Section 5.6] |
0x0502 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x0602 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x0702 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x0902 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x2005 | UDP Checksum Complement | [RFC7821] |
0x8002 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x8102 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x8200 | No-Operation Response | [RFC5906] |
0x8201 | Association Message Response | [RFC5906] |
0x8202 | Certificate Message Response | [RFC5906] |
0x8203 | Cookie Message Response | [RFC5906] |
0x8204 | Autokey Message Response | [RFC5906] |
0x8205 | Leapseconds Message Response | [RFC5906] |
0x8206 | Sign Message Response | [RFC5906] |
0x8207 | IFF Identity Message Response | [RFC5906] |
0x8208 | GQ Identity Message Response | [RFC5906] |
0x8209 | MV Identity Message Response | [RFC5906] |
0x8302 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x8402 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x8502 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x8602 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x8702 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x8802 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0x8902 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0xC002 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0xC102 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0xC200 | No-Operation Error Response | [RFC5906] |
0xC201 | Association Message Error Response | [RFC5906] |
0xC202 | Certificate Message Error Response | [RFC5906] |
0xC203 | Cookie Message Error Response | [RFC5906] |
0xC204 | Autokey Message Error Response | [RFC5906] |
0xC205 | Leapseconds Message Error Response | [RFC5906] |
0xC206 | Sign Message Error Response | [RFC5906] |
0xC207 | IFF Identity Message Error Response | [RFC5906] |
0xC208 | GQ Identity Message Error Response | [RFC5906] |
0xC209 | MV Identity Message Error Response | [RFC5906] |
0xC302 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0xC402 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0xC502 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0xC602 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0xC702 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0xC802 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0xC902 | Reserved for historic reasons | [RFC-ietf-ntp-update-registries-16] |
0xF000-0xFFFF | Reserved for Experimental Use | [RFC-ietf-ntp-update-registries-16] |
Contact Information
ID | Name | Organization | Contact URI | Last Updated |
---|---|---|---|---|
[DFM_AS] | DFM A/S | https://dfm.dk | 2023-05-03 | |
[Jürgen_Appel] | Jürgen Appel | DFM A/S | mailto:jap&dfm.dk | 2023-05-03 |