Bug ID 710564: DNS returns an erroneous invalidate response with EDNS0 CSUBNET Scope Netmask !=0

Last Modified: May 14, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP DNS(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4

Fixed In:
13.1.1.5, 12.1.4.1

Opened: Mar 16, 2018
Severity: 3-Major

Symptoms

The DNS filter returns an erroneous invalidate response with EDNS0 CSUBNET Scope Netmask !=0.

Impact

If the response ECS Scope Netmask has a value other than '0', LTM drops it, causing timeout and retry on client side.

Conditions

- Virtual Server configured with 'DNS Profile' set to 'dns' or a 'dns'-derived profile. - DNS queries with EDNS0 ECS option set.

Workaround

There is no workaround at this time.

Fix Information

None

Behavior Change