The following flowbit signatures are purely for associated signatures to generate an alert.
Some IDS signatures are called “flowbits” signatures, and are used in conjunction with secondary signatures. The signature captures a particular type traffic which is fed to other signatures that trigger an alert or block action. These are purposely set to be silent (no-alert) because they would trigger noisy false positives. No signature with “flowbits:noalert” should be set to drop.
A signature action on these is not valid:
| 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 |
