The network element must deny network traffic by default and allow network traffic by exception at all interfaces at the network perimeter.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-34152	SRG-NET-000202-DNS-NA	SV-44605r1_rule		Medium

Description
All inbound and outbound traffic must be denied by default. Firewalls and perimeter routers should only allow traffic through that is explicitly permitted. The initial defense for the internal network is to block any traffic at the perimeter that is attempting to make a connection to a host residing on the internal network. In addition, allowing unknown or undesirable outbound traffic by the firewall or router will establish ""state"" that will subsequently permit the return of this undesirable traffic inbound. Boundary protection is not a function of DNS.

Description

All inbound and outbound traffic must be denied by default. Firewalls and perimeter routers should only allow traffic through that is explicitly permitted. The initial defense for the internal network is to block any traffic at the perimeter that is attempting to make a connection to a host residing on the internal network. In addition, allowing unknown or undesirable outbound traffic by the firewall or router will establish ""state"" that will subsequently permit the return of this undesirable traffic inbound. Boundary protection is not a function of DNS.

STIG	Date
Domain Name System (DNS) Security Requirements Guide	2012-10-24

Details

Check Text ( C-42112r1_chk )
This is not a function of DNS.

Fix Text (F-38062r1_fix)
This requirement is NA for DNS. No fix required.