Bug ID 581299: DNSRelay Proxy re-transmits DNS requests indefinitely every second if NA DNS servers do not respond

Last Modified: Oct 07, 2023

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

Known Affected Versions:
12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2

Fixed In:
13.0.0, 12.1.0, 12.0.0 HF3

Opened: Mar 17, 2016

Severity: 2-Critical


DNS relay service will send lot of DNS requests inside the network access tunnel if the DNS server is unreachable or unresponsive.


Will generate lot of DNS traffic from user's machine and may have an adverse impact on customer infrastructure.


DNS Relay proxy service is installed on user's machine One or more DNS servers are not reachable or unresponsive


Stop DNS Relay proxy service from service control manager.

Fix Information

Excessive DNS queries are no longer being sent from the EDGE client if the DNS server is unreachable.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips