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Fat AP and Cloud AP V200R008C00 CLI-based Configuration Guide

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Configuring a Client SSL Policy

Configuring a Client SSL Policy

Prerequisites

The PKI domain has been configured.

Context

The SSL protocol uses data encryption, identity authentication, and message integrity check to ensure security of TCP-based application layer protocols. A client SSL policy can be applied to application layer protocols to provide secure connections.

Figure 26-31  AP functions as an SSL client

As shown in Figure 26-31, the Figure 26-31 functions as an SSL client and has a client SSL policy configured. During an SSL handshake, the AP uses the SSL parameters in the client SSL policy to negotiate session parameters with the SSL server. After the handshake is complete, the AP establishes a session with the server.

When functioning as an SSL client, the AP does not allow SSL servers to authenticate it, but it can authenticate SSL servers. When the AP functions as an SSL client, enable it to authenticate servers to ensure secure communication.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run ssl policy policy-name type client

    A client SSL policy is created, and the client SSL policy view is displayed.

  3. Run server-verify enable

    SSL server authentication is enabled.

    By default, SSL server authentication is enabled in a client SSL policy.

  4. Run pki-realm realm-name

    A PKI domain is specified for the client SSL policy.

    By default, no PKI domain is specified for a client SSL policy on the AP.

    NOTE:

    The AP obtains a CA certificate chain from CAs in the specified PKI domain. The AP authenticates an SSL server by checking the server certificate and CA certificates against the CA certificate chain.

  5. (Optional) Run version { ssl3.0 | tls1.0 | tls1.1 | tls1.2 }

    The SSL protocol version is specified.

    By default, a client SSL policy uses Transport Layer Security (TLS) version 1.2.

    NOTE:

    Ensure that the specified SSL protocol version is supported by the SSL server. Before performing this step, check the SSL protocol versions that the SSL server supports.

    TLS1.2 version is recommended, other protocol version has potential security risks.

  6. (Optional) Run prefer-ciphersuite { rsa_3des_cbc_sha | rsa_aes_128_cbc_sha | rsa_des_cbc_sha | rsa_aes_128_sha256 | rsa_aes_256_sha256 } *

    A cipher suite is specified.

    By default, a client SSL policy supports the cipher suites: rsa_aes_128_sha256 and rsa_aes_256_sha256.

    NOTE:

    Ensure that the specified cipher suite is supported by the SSL server. Before performing this step, check the cipher suites that the SSL server supports.

  7. (Optional) Set the SSL renegotiation rate.

    When a device encounters a renegotiation attack, set the renegotiation rate of the SSL connections to reduce the impact of renegotiation on the device.

    1. Run the quit command to return to the system view.
    2. Run the ssl renegotiation-rate rate command to set the SSL renegotiation rate.

      By default, the SSL renegotiation is performed once per second. You can set the rate according to the CPU capability of the device.

      This configuration applies to all SSL policies.

      NOTE:

      Before an STA performs renegotiation, ensure that the STA supports secure renegotiation; otherwise, the STA renegotiation may fail.

Verifying the Configuration

Run the display ssl policy [ policy-name ] command to view the configuration of the SSL policy.

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Updated: 2019-01-11

Document ID: EDOC1000176006

Views: 118685

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