Bug ID 694849: TMM crash when packet sampling is turned for DNS BDOS signatures.

Last Modified: May 29, 2024

Affected Product(s):
BIG-IP AFM(all modules)

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1

Fixed In:

Opened: Nov 16, 2017

Severity: 2-Critical


TMM crashes upon traffic matching a DNS BDOS signature if packet sampling is turned on by enabling db variable (l4bdos.signature.sample.packet.frequency).


Traffic disrupted while tmm restarts.


DB variable l4bdos.signature.sample.packet.frequency is modified to a non-zero value (to collect DNS packet info upon matching a DNS dynamic signature).


Disable the packet sampling feature for BDOS signatures by setting the db variable l4bdos.signature.sample.packet.frequency to default value (0).

Fix Information

TMM no longer crashes when packet sampling is turned on and traffic matches DNS BDOS signature.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips