Bug ID 533114: All DNS requests are sent to NA DNS server if local clients manually change their dns setting

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
12.0.0, 12.0.0 HF1, 12.0.0 HF2

Fixed In:
12.1.0, 12.0.0 HF3

Opened: Jul 13, 2015
Severity: 3-Major

Symptoms

If a Network Access-connected client changes their local dns setting while connected, all DNS requests end up going to the Network Access DNS server

Impact

Client DNS requests will always go through the Network Access DNS servers.

Conditions

Network Access DNS Relay installed on the client APM has a DNS network access resource configured which uses some address space End user manually changes their resolver.

Workaround

There are two workarounds: 1) In DHCP client environments, if a DHCP lease expires and changes their local DNS settings, this works properly. This only happens if manual changes are made on the client machine. 2) The client can be rebooted, which will clear the problem.

Fix Information

If a client manually changes their local DNS settings while connected via Network Access, DNS requests that do not match the Network Access policy will not be routed to the Network Access DNS server.

Behavior Change