Public bug reported:
The comments in the default /etc/mysql/my.cnf file state the following
with regard to the bind-address directive:
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
However this is not the case in 14.04. If the bind-address directive is
left commented out, mysqld binds to 0.0.0.0 by default and responds to
connections coming into any interface.
$ lsb_release -rd
Description: Ubuntu 14.04.3 LTS
Release: 14.04
$ apt-cache policy mariadb-server-core-5.5
mariadb-server-core-5.5:
Installed: 5.5.44-1ubuntu0.14.04.1
Expected behavior:
When no bind-address directive is provided in any configuration file read by
mariadb, default behavior is documented to be that it binds to the loopback
address.
What happened instead:
mysqld binds to 0.0.0.0:3306 and responds to connections coming in on any
interface.
** Affects: mariadb-5.5 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1486651
Title:
Server binds to 0.0.0.0 by default
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