Last Modified: Feb 20, 2020
See more info
Known Affected Versions:
14.1.0, 22.214.171.124, 126.96.36.199, 188.8.131.52, 184.108.40.206, 220.127.116.11, 18.104.22.168, 14.1.2, 15.0.0, 15.0.1, 22.214.171.124, 126.96.36.199
Opened: May 10, 2019
In some scenarios, the named process cannot bind to IPv6 addresses. This occurs because the dnscached process listens to the wildcard IPv6 address port 53 (i.e., :::53) so it cannot respond to queries sent to IPv6 addresses. Following message is reported in ltm log: err named: binding TCP socket: address in use.
The named process does not respond to the queries that are sent to IPv6 addresses at port 53.
-- The named and dnscached processes are not running. -- The dnscached process is started first. -- The named process is started later.
1) Stop both named and dnscached process. 2) Edit the startup script for dnscached to start in IPv4-only mode. 2a) On BIG-IP system, open the file /etc/bigstart/startup/dnscached. 2b) Add "-4" to the command line option of dnscached. 3) Restart the processes: bigstart restart named dnscached
The dnscached startup script has been modified to start in IPv4-only mode, so it does not listen on any IPv6 address.