The Edge SWG must deny network communications traffic by default and allow network communications traffic by exception (i.e., deny all, permit by exception).

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-279168	SYME-00-002800	SV-279168r1170614_rule	CCI-001109	medium
Description
Ensure a Web Access Policy (under SYME-00-002500) has been created for allow rules or all proxy access will be denied. A deny-all, permit-by-exception network communications traffic policy ensures only those connections that are essential and approved are allowed. As a managed interface, the ALG must block all inbound and outbound network communications traffic to the application being managed and controlled unless a policy filter is installed to explicitly allow the traffic. The allow policy filters must comply with the site's security policy. A deny all, permit by exception network communications traffic policy ensures that only those connections that are essential and approved, are allowed. This requirement applies to both inbound and outbound network communications traffic. All inbound and outbound traffic for which the ALG is acting as an intermediary or proxy must be denied by default.
STIG			Date
Symantec Edge SWG ALG Security Technical Implementation Guide			2025-12-16

Related Frameworks

1 mapping across 4 frameworks

SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

NET-04.1Deny Traffic by Default & Allow Traffic by Exception

0.50

DISA STIG Benchmark (XCCDF)V1R1intersects(normalised)
DISA CCI List2025-01-23equal to(normalised)
SCF Secure Traceability Relationship Mapping (STRM)2026.2intersects

NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (6) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-4Information Flow Enforcement

1.00

DISA STIG Benchmark (XCCDF)V1R1intersects(normalised)
DISA STIG Benchmark (XCCDF)V1R1our copyintersects(normalised)
DISA STIG Benchmark (XCCDF)V1R1intersects(normalised)
DISA CCI List2025-01-23equal to(normalised)

SC-24Fail in Known State

1.00

DISA STIG Benchmark (XCCDF)V1R1intersects(normalised)
DISA STIG Benchmark (XCCDF)V1R2our copyintersects(normalised)
DISA STIG Benchmark (XCCDF)V1R2intersects(normalised)
DISA CCI List2025-01-23equal to(normalised)

SC-5Denial-of-service Protection

1.00

DISA STIG Benchmark (XCCDF)V1R1intersects(normalised)
DISA STIG Benchmark (XCCDF)V1R2our copyintersects(normalised)
DISA STIG Benchmark (XCCDF)V1R2intersects(normalised)
DISA CCI List2025-01-23equal to(normalised)

SC-7Boundary Protection

1.00

DISA STIG Benchmark (XCCDF)V1R1intersects(normalised)
DISA STIG Benchmark (XCCDF)V1R2our copyintersects(normalised)
DISA STIG Benchmark (XCCDF)V1R2intersects(normalised)
DISA CCI List2025-01-23equal to(normalised)

SC-7(11)Restrict Incoming Communications Traffic

1.00

DISA STIG Benchmark (XCCDF)V1R1intersects(normalised)
DISA STIG Benchmark (XCCDF)V1R2our copyintersects(normalised)
DISA STIG Benchmark (XCCDF)V1R2intersects(normalised)
DISA CCI List2025-01-23equal to(normalised)

SC-7(5)Deny by Default — Allow by Exception

1.00

DISA STIG Benchmark (XCCDF)V1R1intersects(normalised)
DISA CCI List2025-01-23equal to(normalised)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.13.6

1.00

DISA STIG Benchmark (XCCDF)V1R1intersects(normalised)
DISA CCI List2025-01-23equal to(normalised)
NIST SP 800-171 Rev 2, Appendix DRev 2 (Feb 2020, errata Jan 2021)equal to(normalised)

CCI1 mapping

CCI-001109

1.00

DISA STIG Benchmark (XCCDF)V1R1intersects(normalised)

Details

Check Text (C-279168r1170614_chk)

1. In the Edge SWG Web UI, navigate to the Configuration tab. 2. Select "Policy and Policy Settings". If the Default Proxy Policy is set to "Allow", this is a finding.

Fix Text (F-83621r1170613_fix)

1. In the Edge SWG Web UI, navigate to the Configuration tab. 2. Select "Policy and Policy Settings". 3. Set the Default Proxy Policy to "Deny". 4. Click "Apply", then "Save".