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-34717	SRG-NET-000202-IDPS-NA	SV-45611r1_rule		Low

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 a state that will subsequently permit the return of this undesirable traffic inbound. This requirement applies to devices whose main purpose is the blocking of network traffic such as firewalls and routers and is not applicable to the IDPS.

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 a state that will subsequently permit the return of this undesirable traffic inbound. This requirement applies to devices whose main purpose is the blocking of network traffic such as firewalls and routers and is not applicable to the IDPS.

STIG	Date
Intrusion Detection and Prevention Systems (IDPS) Security Requirements Guide	2012-11-19

Details

Check Text ( C-42977r1_chk )
This requirement is NA for IDPS. No fix required.

Fix Text (F-39009r1_fix)
This requirement is NA for IDPS. No fix required.