Set up Security Scanning in DTR
Estimated reading time: 7 minutesThis page explains how to set up and enable Docker Security Scanning on an existing installation of Docker Trusted Registry.
Prerequisites
These instructions assume that you have already installed Docker Trusted Registry, and have access to an account on the DTR instance with administrator access.
Before you begin, make sure that you or your organization has purchased a DTR license that includes Docker Security Scanning, and that your Docker ID can access and download this license from Docker Hub.
If you are using a license associated with an individual account, no additional
action is needed. If you are using a license associated with an organization
account, you may need to make sure your Docker ID is a member of the Owners
team. Only Owners
team members can download license files for an Organization.
If you will be allowing the Security Scanning database to update itself
automatically, make sure that the server hosting your DTR instance can access
https://dss-cve-updates.docker.com/
on the standard https port 443.
Get the security scanning license.
If your DTR instance already has a license that includes Security Scanning, skip this step and proceed to enable DTR Security Scanning.
Tip: To check if your existing DTR license includes scanning, navigate to the DTR Settings page, and click Security. If an “Enable scanning” toggle appears, the license includes scanning.
If your current DTR license doesn’t include scanning, you must first download the new license.
- Log in to Docker Hub using a Docker ID with access to the license you need.
- In the top right corner, click your user account icon, and select My Content.
- Locate Docker Enterprise Edition in the content list, and click Setup.
- Click License Key to download the license.
Next, install the new license on the DTR instance.
- Log in to your DTR instance using an administrator account.
- Click Settings in the left navigation.
-
On the General tab click Apply new license.
A file browser dialog appears.
- Navigate to where you saved the license key (
.lic
) file, select it, and click Open.
Proceed to enable DTR Security Scanning.
Enable DTR security scanning
To enable security scanning in DTR:
- Log in to your DTR instance with an administrator account.
- Click Settings in the left navigation.
-
Click the Security tab.
Note: If you see a message on this tab telling you to contact your Docker sales representative, then the license installed on this DTR instance does not include Docker Security Scanning. Check that you have purchased Security Scanning, and that the DTR instance is using the latest license file.
- Click the Enable scanning toggle so that it turns blue and says “on”.
-
Next, provide a security database for the scanner. Security scanning will not function until DTR has a security database to use.
By default, security scanning is enabled in Online mode. In this mode, DTR attempts to download a security database from a Docker server. If your installation cannot access
https://dss-cve-updates.docker.com/
you must manually upload a.tar
file containing the security database.- If you are using
Online
mode, the DTR instance will contact a Docker server, download the latest vulnerability database, and install it. Scanning can begin once this process completes. - If you are using
Offline
mode, use the instructions in Update scanning database - offline mode to upload an initial security database.
- If you are using
By default when Security Scanning is enabled, new repositories will automatically scan on docker push
. If you had existing repositories before you enabled security scanning, you might want to change repository scanning behavior.
Set repository scanning mode
Two modes are available when Security Scanning is enabled:
Scan on push & Scan manually
: the image is re-scanned on eachdocker push
to the repository, and whenever a user withwrite
access clicks the Start Scan links or Scan button.Scan manually
: the image is scanned only when a user withwrite
access clicks the Start Scan links or Scan button.
By default, new repositories are set to Scan on push & Scan manually
, but
you can change this setting during repository creation.
Any repositories that existed before scanning was enabled are set to Scan manually
mode by default. If these repositories are still in use, you can change this setting from each repository’s Settings page.
Note: To change an individual repository’s scanning mode, you must have
write
oradmin
access to the repo.
To change an individual repository’s scanning mode:
- Navigate to the repository, and click the Settings tab.
- Scroll down to the Image scanning section.
- Select the desired scanning mode.
Update the CVE scanning database
Docker Security Scanning indexes the components in your DTR images and compares them against a known CVE database. When new vulnerabilities are reported, Docker Security Scanning matches the components in new CVE reports to the indexed components in your images, and quickly generates an updated report.
Users with administrator access to DTR can check when the CVE database was last updated from the Security tab in the DTR Settings pages.
Update CVE database - online mode
By default Docker Security Scanning checks automatically for updates to the vulnerability database, and downloads them when available. If your installation does not have access to the public internet, use the Offline mode instructions below.
To ensure that DTR can access these updates, make sure that the host can reach
https://dss-cve-updates.docker.com/
on port 443 using https.
DTR checks for new CVE database updates at 3:00 AM UTC every day. If an update is found it is downloaded and applied without interrupting any scans in progress. Once the update is complete, the security scanning system looks for new vulnerabilities in the indexed components.
To set the update mode to Online:
- Log in to DTR as a user with administrator rights.
- Click Settings in the left navigation and click Security.
- Click Online.
Your choice is saved automatically.
Tip: DTR also checks for CVE database updates when scanning is first enabled, and when you switch update modes. If you need to check for a CVE database update immediately, you can briefly switch modes from online to offline and back again.
Update CVE database - offline mode
To update the CVE database for your DTR instance when it cannot contact the update server, you download and install a .tar
file that contains the database updates. To download the file:
-
Log in to the Docker Hub.
If you are a member of an Organization managing licenses using Docker Hub, make sure your account is a member of the
Owners
team. Only Owners can view and manage licenses and other entitlements for Organizations from the Docker Hub. - In the top right corner, click your user account icon, and select My Content.
- If necessary, select an organization account from the Accounts menu at the upper right.
- Locate your Docker EE Advanced subscription or trial.
-
Click Setup button.
-
Click Download CVE Vulnerability Database link to download the database file.
If you run into problems, contact us at nautilus-feedback@docker.com for the file.
To manually update the DTR CVE database from a .tar
file:
- Log in to DTR as a user with administrator rights.
- Click Settings in the left navigation and click Security.
- Click Upload .tar database file.
- Browse to the latest
.tar
file that you received, and click Open.
DTR installs the new CVE database, and begins checking already indexed images for components that match new or updated vulnerabilities.
Tip: The Upload button is unavailable while DTR applies CVE database updates.
Enable or disable automatic database updates
To change the update mode:
- Log in to DTR as a user with administrator rights.
- Click Settings in the left navigation and click Security.
- Click Online/Offline.
Your choice is saved automatically.