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Configuring PCI DSS/3DS Compliance Check and TLS

Updated on 2025-01-17 GMT+08:00

Transport Layer Security (TLS) provides confidentiality and ensures data integrity for data sent between applications over the Internet. HTTPS is a network protocol constructed based on TLS and HTTP and can be used for encrypted transmission and identity authentication. If you select Cloud or Dedicated for Protection and set Client Protocol to HTTPS, set the minimum TLS version and cipher suite (a set of multiple cryptographic algorithms) for your domain name to block requests that use a TLS version earlier than the configured one.

In WAF, the minimum TLS version configured is TLS v1.0, and the cipher suite is Security cipher suite by default.

WAF allows you to enable PCI DSS and PCI 3DS certification checks. After PCI DSS or PCI 3DS certification check is enabled, the minimum TLS version is automatically set to TLS v1.2 to meet the PCI DSS and PCI 3DS certification requirements. The Payment Card Industry Data Security Standard (PCI DSS) is an information security standard for organizations that handle branded credit cards from the major card schemes. PCI 3-Domain Secure (PCI 3DS) is a PCI Core Security Standard.

NOTE:

If you have enabled enterprise projects, ensure that you have all operation permissions for the project where your WAF instance locates. Then, you can select the enterprise project from the Enterprise Project drop-down list and configure PCI DSS or PCI 3DS and TLS for the domain names.

Prerequisites

You have added the website to WAF and selected HTTPS for Client Protocol.

Constraints

  • You have selected Cloud Mode - CNAME or Dedicated Mode for protection when adding the website to WAF.
    NOTE:

    If you use cloud mode - load balancer access mode, you need to configure TLS security policies on the ELB console.

  • If Client Protocol for the website you want to protect is set to HTTP, TLS is not required, and you can skip this topic.
  • If you configure multiple combinations of server information, PCI DSS and PCI 3DS compliance certification checks can be set only when Client Protocol is set to HTTPS in all of those combinations.
  • If PCI DSS/3DS compliance check is enabled, the client protocol cannot be changed, and no servers can be added.

Application Scenarios

By default, the minimum TLS version configured for WAF is TLS v1.0. To ensure website security, configure the right TLS version for your service requirements. Table 1 lists the minimum TLS versions supported for different scenarios.

Table 1 Minimum TLS versions supported

Scenario

Minimum TLS Version (Recommended)

Protection Effect

Websites that handle critical business data, such as sites used in banking, finance, securities, and e-commerce.

TLS v1.2

WAF automatically blocks website access requests that use TLS v1.0 or TLS v1.1.

Websites with basic security requirements, for example, small- and medium-sized enterprise websites.

TLS v1.1

WAF automatically blocks website access requests that use TLS v1.0.

Client applications with no special security requirements

TLS v1.0

Requests using any TLS protocols can access the website.

NOTE:

Before you configure TLS, check the TLS version of your website.

The recommended cipher suite in WAF is Security cipher suite. It offers a good mix of browser compatibility and security. For details about each cipher suite, see Table 2.

Table 2 Description of cipher suites

Cipher Suite Name

Cryptographic Algorithm Supported

Cryptographic Algorithm Not Supported

Description

Classic cipher suite

NOTE:

By default, Security cipher suite is configured for websites. However, if the request does not carry the server name indication (SNI), WAF uses the Classic cipher suite.

  • ECDHE-RSA-AES256-SHA384
  • AES256-SHA256
  • RC4
  • HIGH
  • MD5
  • aNULL
  • eNULL
  • NULL
  • DH
  • EDH
  • AESGCM
  • Compatibility: Good.

    A wide range of browsers are supported.

  • Security: Average

Cipher suite 1

  • ECDHE-ECDSA-AES256-GCM-SHA384
  • HIGH
  • MEDIUM
  • LOW
  • aNULL
  • eNULL
  • DES
  • MD5
  • PSK
  • RC4
  • kRSA
  • 3DES
  • DSS
  • EXP
  • CAMELLIA

Recommended configuration.

  • Compatibility: Good.

    A wide range of browsers are supported.

  • Security: Good

Cipher suite 2

  • EECDH+AESGCM
  • EDH+AESGCM

-

  • Compatibility: Average.

    Strict compliance with forward secrecy requirements of PCI DSS and excellent protection, but browsers of earlier versions may be unable to access the website.

  • Security: Excellent

Cipher suite 3

  • ECDHE-RSA-AES128-GCM-SHA256
  • ECDHE-RSA-AES256-GCM-SHA384
  • ECDHE-RSA-AES256-SHA384
  • RC4
  • HIGH
  • MD5
  • aNULL
  • eNULL
  • NULL
  • DH
  • EDH
  • Compatibility: Average.

    Earlier versions of browsers may be unable to access the website.

  • Security: Excellent.

    Multiple algorithms, such as ECDHE, DHE-GCM, and RSA-AES-GCM, are supported.

Cipher suite 4

  • ECDHE-RSA-AES256-GCM-SHA384
  • ECDHE-RSA-AES128-GCM-SHA256
  • ECDHE-RSA-AES256-SHA384
  • AES256-SHA256
  • RC4
  • HIGH
  • MD5
  • aNULL
  • eNULL
  • NULL
  • EDH
  • Compatibility: Good.

    A wide range of browsers are supported.

  • Security: Average.

    The GCM algorithm is supported.

Cipher suite 5

  • AES128-SHA:AES256-SHA
  • AES128-SHA256:AES256-SHA256
  • HIGH
  • MEDIUM
  • LOW
  • aNULL
  • eNULL
  • EXPORT
  • DES
  • MD5
  • PSK
  • RC4
  • DHE

Supported algorithms: RSA-AES-CBC only

Cipher suite 6

  • ECDHE-ECDSA-AES256-GCM-SHA384
  • ECDHE-RSA-AES256-GCM-SHA384
  • ECDHE-ECDSA-AES128-GCM-SHA256
  • ECDHE-RSA-AES128-GCM-SHA256
  • ECDHE-ECDSA-AES256-SHA384
  • ECDHE-RSA-AES256-SHA384
  • ECDHE-ECDSA-AES128-SHA256
  • ECDHE-RSA-AES128-SHA256

-

  • Compatibility: Average
  • Security: Good

Security cipher suite

  • ECDHE-ECDSA-AES256-GCM-SHA384
  • HIGH
  • MEDIUM
  • LOW
  • aNULL
  • eNULL
  • DES
  • MD5
  • PSK
  • RC4
  • kRSA
  • SRP
  • 3DES
  • DSS
  • EXP
  • CAMELLIA
  • SHA1
  • SHA256
  • SHA384

This cipher suite supports all algorithms in cipher suite 1, except for the CBC algorithm. Recommended. This cipher suite can meet security requirements in most scenarios.

  • Compatibility: Average. Core suite: ECDHE-ECDSA-AES256-GCM-SHA384. Old protocols and weak algorithms are disabled. Browsers of earlier versions may fail to access the system.
  • Security: Excellent

Cipher suite 8

  • AESGCM
  • HIGH
  • ECDHE
  • RSA
  • DH
  • EXPORT
  • RC4
  • MEDIUM
  • LOW
  • aNULL
  • eNULL

Supports AES-GCM, providing strong encryption and data integrity protection.

  • Compatibility: Good. A wide range of browsers are supported.
  • Security: Good

The TLS cipher suites in WAF are compatible with all browsers and clients of later versions but are incompatible with some browsers of earlier versions. Table 3 lists the incompatible browsers and clients if the TLS v1.0 protocol is used.

NOTICE:

It is recommended that compatibility tests should be carried out on the service environment to ensure service stability.

Table 3 Incompatible browsers and clients for cipher suites under TLS v1.0

Browser/Client

Classic Cipher Suite

Cipher Suite 1

Cipher Suite 2

Cipher Suite 3

Cipher Suite 4

Cipher Suite 5

Cipher Suite 6

Security Cipher Suite

Cipher Suite 8

Google Chrome 63 /macOS High Sierra 10.13.2

Not compatible

Compatible

Compatible

Compatible

Not compatible

Compatible

Compatible

Compatible

Google Chrome 49/ Windows XP SP3

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Compatible

Compatible

Not compatible

Internet Explorer 6

/Windows XP

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Internet Explorer 8

/Windows XP

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Safari 6/iOS 6.0.1

Compatible

Compatible

Not compatible

Compatible

Compatible

Compatible

Compatible

Not compatible

Safari 7/iOS 7.1

Compatible

Compatible

Not compatible

Compatible

Compatible

Compatible

Compatible

Compatible

Compatible

Safari 7/OS X 10.9

Compatible

Compatible

Not compatible

Compatible

Compatible

Compatible

Compatible

Compatible

Compatible

Safari 8/iOS 8.4

Compatible

Compatible

Not compatible

Compatible

Compatible

Compatible

Compatible

Compatible

Compatible

Safari 8/OS X 10.10

Compatible

Compatible

Not compatible

Compatible

Compatible

Compatible

Compatible

Compatible

Compatible

Internet Explorer

7/Windows Vista

Compatible

Compatible

Not compatible

Compatible

Compatible

Not compatible

Not compatible

Internet Explorer 8, 9, or 10

/Windows 7

Compatible

Compatible

Not compatible

Compatible

Compatible

Not compatible

Not compatible

Internet Explorer 10

/Windows Phone 8.0

Compatible

Compatible

Not compatible

Compatible

Compatible

Not compatible

Not compatible

Java 7u25

Compatible

Compatible

Not compatible

Compatible

Compatible

Not compatible

Not compatible

OpenSSL 0.9.8y

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Not compatible

Safari 5.1.9/OS X 10.6.8

Compatible

Compatible

Not compatible

Compatible

Compatible

Not compatible

Not compatible

Safari 6.0.4/OS X 10.8.4

Compatible

Compatible

Not compatible

Compatible

Compatible

Not compatible

Not compatible

Impact on the System

  • If you enable the PCI DSS certification check:
    • The minimum TLS version and cypher suite are automatically set to TLS v1.2 and EECDH+AESGCM:EDH+AESGCM, respectively, and cannot be changed.
    • To change the minimum TLS version and cipher suite, disable the check.
  • If you enable the PCI 3DS certification check:
    • The minimum TLS version is automatically set to TLS v1.2 and cannot be changed.
    • The check cannot be disabled.

Configuring PCI DSS/3DS Compliance Check and TLS

  1. Log in to the management console.
  2. Click in the upper left corner of the management console and select a region or project.
  3. Click in the upper left corner and choose Web Application Firewall under Security & Compliance.
  4. In the navigation pane on the left, choose Website Settings.
  5. In the Domain Name column, click the domain name of the website to go to the basic information page.
  6. In the Compliance Certification row, you can select PCI DSS and/or PCI 3DS to allow WAF to check your website for the corresponding PCI certification compliance. In the TLS Configuration row, click to complete TLS configuration.

    Figure 1 TLS configuration modification
    • Select PCI DSS. In the displayed Warning dialog box, click OK to enable the PCI DSS certification check.

      NOTICE:

      If PCI DSS certification check is enabled, the minimum TLS version and cypher suite cannot be changed.

    • Select PCI 3DS. In the displayed Warning dialog box, click OK to enable the PCI 3DS certification check.

      NOTICE:
      • If PCI 3DS certification check is enabled, the minimum TLS version cannot be changed.
      • Once enabled, the PCI 3DS certification check cannot be disabled.

  7. Click Modify next to a TLS cipher suite in the row of International.
  8. In the displayed TLS Configuration dialog box, select the minimum TLS version and cipher suite.

    Figure 2 TLS Configuration
    Select the minimum TLS version you need. The options are as follows:
    • TLS v1.0: the default version. Requests using TLS v1.0 or later can access the domain name.
    • TLS v1.1: Only requests using TLS v1.1 or later can access the domain name.
    • TLS v1.2: Only requests using TLS v1.2 or later can access the domain name.

  9. Click OK.

Verification

If the Minimum TLS Version is set to TLS v1.2, the website can be accessed over connections secured by TLS v1.2 or later, but cannot be accessed over connections secured by TLS v1.1 or earlier.

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