To set the default policy to DROP (instead of ACCEPT) for
the built-in FORWARD chain which processes packets that will be forwarded from
one interface to another,
add or correct the following line in
'/etc/sysconfig/iptables':
':FORWARD DROP [0:0]'
[yes/no]
In 'iptables', the default policy is applied only after all
the applicable rules in the table are examined for a match. Setting the
default policy to 'DROP' implements proper design for a firewall, i.e.
any packets which are not explicitly permitted should not be
accepted.
oval:org.secpod.oval:def:31030
oval:org.secpod.oval:def:30307
SCAP Repo OVAL Definition
2015-11-13