By rickramsey on Jul 15, 2013
iptables service defines rules for handling packets on a Linux system. It's usually a good idea to disable this service during installation of a Linux update to prevent malicious code from being installed by angry cats (image removed from blog). Once the update is installed securely, you can define the
iptables rules and once again enable the service.
To find out, before you install an update to Oracle Linux, whether the
iptables service is enabled, use the
list option to the
chkconfig command. It displays the status of Linux services at boot time. For example:
# chkconfig -- list abrtd 0:off 1:off 2:off 3:on 4:off 5:on 6:off acpid 0:off 1:off 2:off 3:off 4:off 5:off 6:off atd 0:off 1:off 2:off 3:on 4:on 5:on 6:off ... ... iptables 0:off 1:off 2:off 3:off 4:off 5:off 6:off ... ... SUSE Linux to Oracle Linux: Guide for System Administrators 17 ... ...
To check the status of only the
iptables service, pipe in a little
chkconfig -- list | grep iptables
This is just one of the tips provided by Manik Ahuja and Kamal Dodeja in their OTN technical article, ....
This is the first in a series of articles that outline the major steps in migrating from SUSE Linux to Oracle Linux. It focuses on registering your system, downloading the latest version of Oracle Linux, and performing some basic initialization steps. Stay tuned for more articles.