Bug ID 1352801: Unnessecary DNS lookups invoked by the bot defense process

Last Modified: Dec 05, 2024

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

Known Affected Versions:
17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4

Fixed In:
17.1.2

Opened: Sep 16, 2023

Severity: 3-Major

Symptoms

DNS lookups happen by advanced WAF without any relevant feature turned on.

Impact

Performance impact, unnecessary DNS lookups.

Conditions

- Parameter data type is set to auto-detect (auto-detect will detect URI automatically) - A request contains a URI

Workaround

Change the default wildcard parameter (or other relevant parameters) from auto-detect to other options (usually alpha-numeric).

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips