| Tag | Field Name | Req'd | Comments | ||
|---|---|---|---|---|---|
| Component Block <Standard Header> | Y | MsgType = A
| |||
| 98 | EncryptMethod | Y | (Always unencrypted)
| ||
| 108 | HeartBtInt | Y | Note same value used by both sides
| ||
| 95 | RawDataLength | N | Required for some authentication methods
| ||
| 96 | RawData | N | Required for some authentication methods
| ||
| 141 | ResetSeqNumFlag | N | Indicates both sides of a FIX session should reset sequence numbers
| ||
| 789 | NextExpectedMsgSeqNum | N | Optional, alternative via counterparty bi-lateral agreement message gap detection and recovery approach (see "Logon Message NextExpectedMsgSeqNum Processing" section)
| ||
| 383 | MaxMessageSize | N | Can be used to specify the maximum number of bytes supported for messages received
| ||
| 384 | NoMsgTypes | N | Specifies the number of repeating RefMsgTypes specified
| ||
|
372 | RefMsgType | N | Specifies a specific, supported MsgType. Required if NoMsgTypes is > 0. Should be specified from the point of view of the sender of the Logon message
| |
|
385 | MsgDirection | N | Indicates direction (send vs. receive) of a supported MsgType. Required if NoMsgTypes is > 0. Should be specified from the point of view of the sender of the Logon message
| |
| 464 | TestMessageIndicator | N | Can be used to specify that this FIX session will be sending and receiving “test” vs. “production” messages.
| ||
| 553 | Username | N |
| ||
| 554 | Password | N | Note: minimal security exists without transport-level encryption.
| ||
| Component Block <Standard Trailer> | Y |
| |||