STIGQter: STIG Summary: Crunchy Data Postgres 16 Security Technical Implementation Guide Version: 1 Release: 3 Benchmark Date: 01 Jul 2026:

PostgreSQL must disable network functions, ports, protocols, and services deemed by the organization to be nonsecure, in accordance with the Ports, Protocols, and Services Management (PPSM) guidance.

DISA Rule

SV-261926r1000783_rule

Vulnerability Number

V-261926

Group Title

SRG-APP-000383-DB-000364

Rule Version

CD16-00-008000

Severity

CAT II

CCI(s)

• CCI-001762 - Disable or remove organization-defined functions, ports, protocols, software, and services within the system deemed to be unnecessary and/or nonsecure.

Weight

10

Fix Recommendation

Note: The following instructions use the PGDATA and PGVER environment variables. Refer to APPENDIX-F for instructions on configuring PGDATA and APPENDIX-H for PGVER.

To change the listening port of the database, as the database administrator, change the following setting in postgresql.conf:

$ sudo su - postgres
$ vi $PGDATA/postgresql.conf

Change the port parameter to the desired port.

Restart the database:

$ sudo systemctl restart postgresql-${PGVER?}

Note: psql uses the port 5432 by default. This can be changed by specifying the port with psql or by setting the PGPORT environment variable:

$ psql -p 5432 -c "SHOW port"
$ export PGPORT=5432

Check Contents

As the database administrator, run the following SQL:

$ psql -c "SHOW port"

If the currently defined port configuration is deemed prohibited, this is a finding.

Vulnerability Number

V-261926

Documentable

False

Rule Version

CD16-00-008000

Severity Override Guidance

As the database administrator, run the following SQL:

$ psql -c "SHOW port"

If the currently defined port configuration is deemed prohibited, this is a finding.

Check Content Reference

M

Target Key

5598