The Juniper SRX Services Gateway Firewall must continuously monitor outbound communications traffic for unusual/unauthorized activities or conditions.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-214538	JUSX-AG-000145	SV-214538r831590_rule		High

Description
If outbound communications traffic is not continuously monitored, hostile activity may not be detected and prevented. Output from application and traffic monitoring serves as input to continuous monitoring and incident response programs. The Juniper SRX is a highly scalable system which can provide stateful or stateless continuous monitoring when placed in the architecture at either the perimeter or internal boundaries. Unusual/unauthorized activities or conditions may include unusual use of unusual protocols or ports and attempted communications from trusted zones to external addresses.

Description

If outbound communications traffic is not continuously monitored, hostile activity may not be detected and prevented. Output from application and traffic monitoring serves as input to continuous monitoring and incident response programs. The Juniper SRX is a highly scalable system which can provide stateful or stateless continuous monitoring when placed in the architecture at either the perimeter or internal boundaries. Unusual/unauthorized activities or conditions may include unusual use of unusual protocols or ports and attempted communications from trusted zones to external addresses.

STIG	Date
Juniper SRX Services Gateway ALG Security Technical Implementation Guide	2024-06-10

Details

Check Text ( C-15744r297298_chk )
For each outbound zone, verify a firewall screen or security policy is configured. [edit] show security zones show security policies If communications traffic for each outbound zone is not configured with a firewall screen or security policy, this is not a finding.

Fix Text (F-15742r297299_fix)
Configure a security policy or screen to each outbound zone to implement continuous monitoring. The following commands configure a security zone called “untrust” that can be used to apply security policy for inbound interfaces that are connected to untrusted networks. This example assumes that interfaces ge-0/0/1 and ge-0/0/2 are connected to untrusted and trusted network segments. Apply policy or screen to a zone example: set security zones security-zone untrust interfaces ge-0/0/1.0 set security zones security-zone trust interfaces ge-0/0/2.0 set security zones security-zone untrust screen untrust-screen set security policies from-zone trust to-zone untrust policy default-deny match destination-address any set security policies from-zone trust to-zone untrust policy default-deny then deny

Fix Text (F-15742r297299_fix)

Configure a security policy or screen to each outbound zone to implement continuous monitoring. The following commands configure a security zone called “untrust” that can be used to apply security policy for inbound interfaces that are connected to untrusted networks. This example assumes that interfaces ge-0/0/1 and ge-0/0/2 are connected to untrusted and trusted network segments.

Apply policy or screen to a zone example:

set security zones security-zone untrust interfaces ge-0/0/1.0
set security zones security-zone trust interfaces ge-0/0/2.0
set security zones security-zone untrust screen untrust-screen
set security policies from-zone trust to-zone untrust policy default-deny match destination-address any
set security policies from-zone trust to-zone untrust policy default-deny then deny