下列流量位元簽章僅供相關聯的簽章用於產生警示。
部分 IDS 簽章稱為「flowbits」簽章，並且會與次要簽章結合使用。簽章會擷取特定類型的流量，該流量會饋送至其他簽章，以觸發警示或封鎖動作。這些是特意設定為無訊息 (無警示)，因為它們會觸發干擾性的誤報。不應將具有「flowbits:noalert」的任何簽章設定為捨棄。
這些的項目上的簽章動作無效：
| 4100456 | 4009397 |
| 4100501 | 4009398 |
| 4100541 | 4009399 |
| 4100542 | 4009400 |
| 4100648 | 4009401 |
| 4100660 | 4009402 |
| 4100696 | 4009403 |
| 4100698 | 4009404 |
| 4100723 | 4009405 |
| 4100724 | 4009406 |
| 4100757 | 4009407 |
| 4100773 | 4009409 |
| 4100811 | 4009413 |
| 4101043 | 4009476 |
| 4101094 | 4009684 |
| 4101252 | 4009685 |
| 4101272 | 4009775 |
| 4101273 | 4009776 |
| 4101327 | 4009777 |
| 4101332 | 4009778 |
| 4101367 | 4010014 |
| 4101371 | 4010015 |
| 4101410 | 4010045 |
| 4101411 | 4010046 |
| 4101433 | 4010048 |
| 4101608 | 4010093 |
| 4101718 | 4010094 |
| 4101722 | 4010095 |
| 4101729 | 4010544 |
| 4101959 | 4010545 |
| 4101969 | 4010602 |
| 4102141 | 4011031 |
| 4102220 | 4011054 |
| 4102238 | 4011398 |
| 4102338 | 4011399 |
| 4102355 | 4011400 |
| 4102365 | 4011801 |
| 4102445 | 2021381 |
| 4102598 | 2026514 |
| 4102655 | 2027507 |
| 4000379 | 2027672 |
| 4000596 | 2027673 |
| 4000601 | 2027674 |
| 4000635 | 2027734 |
| 4000735 | 2018050 |
| 4000839 | 2027955 |
| 4000886 | 2027957 |
| 4000887 | 2027958 |
| 4001659 | 2020154 |
| 4001838 | 2021150 |
| 4002094 | 2022131 |
| 4002168 | 2022882 |
| 4002608 | 2023182 |
| 4002705 | 2024772 |
| 4002805 | 2024773 |
| 4003322 | 2024774 |
| 4003737 | 2024775 |
| 4003738 | 2025068 |
| 4004182 | 2026489 |
| 4004204 | 2026490 |
| 4004322 | 2027395 |
| 4004371 | 2011456 |
| 4004452 | 2014096 |
| 4004453 | 2016539 |
| 4004945 | 2018754 |
| 4005329 | 2019668 |
| 4005355 | 2019738 |
| 4005359 | 2019901 |
| 4005532 | 2020420 |
| 4005993 | 2020573 |
| 4006225 | 2023087 |
| 4006667 | 2023766 |
| 4007072 | 2024928 |
| 4007389 | 2025086 |
| 4007517 | 2028945 |
| 4007573 | 2028946 |
| 4007596 | 2029127 |
| 4007607 | 2029338 |
| 4008153 | 2029352 |
| 4009124 | 2029455 |
| 4009383 | 2018463 |
| 4009384 | 2029477 |
| 4009385 | 2024604 |
| 4009386 | 2029814 |
| 4009387 | 2029986 |
| 4009389 | 2030027 |
| 4009392 | 2009240 |
| 4009393 | 2018570 |
| 4009394 | 2018571 |
| 4009395 | 2030180 |
| 4009396 | 2021531 |
| 2022317 |
