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12-SSL commands
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12-SSL commands 71.84 KB

SSL commands

certificate-chain-sending enable

Use certificate-chain-sending enable to enable the SSL server to send the complete certificate chain to the client during SSL negotiation.

Use undo certificate-chain-sending enable to restore the default.

Syntax

certificate-chain-sending enable

undo certificate-chain-sending enable

Default

During SSL negotiation, the SSL server sends the server certificate rather than the complete certificate chain to the client.

Views

SSL server policy view

Predefined user roles

network-admin

Usage guidelines

This feature causes additional overheads in the SSL negotiation process. Enable it only when the SSL client do not have the complete certificate chain to verify the server certificate.

Examples

<Sysname> system-view

[Sysname] ssl server-policy policy1

[Sysname-ssl-server-policy-policy1] certificate-chain-sending enable

ciphersuite

Use ciphersuite to specify the cipher suites supported by an SSL server policy.

Use undo ciphersuite to restore the default.

Syntax

ciphersuite { dhe_rsa_aes_128_cbc_sha | dhe_rsa_aes_256_cbc_sha | exp_rsa_des_cbc_sha | exp_rsa_rc2_md5 | exp_rsa_rc4_md5 | rsa_3des_ede_cbc_sha | rsa_aes_128_cbc_sha | rsa_aes_256_cbc_sha | rsa_des_cbc_sha | rsa_rc4_128_md5 | rsa_rc4_128_sha } *

undo ciphersuite

Default

An SSL server policy supports all cipher suites.

Views

SSL server policy view

Predefined user roles

network-admin

Parameters

dhe_rsa_aes_128_cbc_sha: Specifies key exchange algorithm DHE RSA, data encryption algorithm 128-bit AES, and the MAC algorithm SHA.

dhe_rsa_aes_256_cbc_sha: Specifies key exchange algorithm DHE RSA, data encryption algorithm 256-bit AES, and the MAC algorithm SHA.

exp_rsa_des_cbc_sha: Specifies the export cipher suite that uses key exchange algorithm RSA, data encryption algorithm DES_CBC, and the MAC algorithm SHA.

exp_rsa_rc2_md5: Specifies the export cipher suite that uses key exchange algorithm RSA, data encryption algorithm RC2, and the MAC algorithm MD5.

exp_rsa_rc4_md5: Specifies the export cipher suite that uses key exchange algorithm RSA, data encryption algorithm RC4, and the MAC algorithm MD5.

rsa_3des_ede_cbc_sha: Specifies key exchange algorithm RSA, data encryption algorithm 3DES_EDE_CBC, and the MAC algorithm SHA.

rsa_aes_128_cbc_sha: Specifies key exchange algorithm RSA, data encryption algorithm 128-bit AES_CBC, and the MAC algorithm SHA.

rsa_aes_256_cbc_sha: Specifies key exchange algorithm RSA, data encryption algorithm 256-bit AES_CBC, and the MAC algorithm SHA.

rsa_des_cbc_sha: Specifies key exchange algorithm RSA, data encryption algorithm DES_CBC, and the MAC algorithm SHA.

rsa_rc4_128_md5: Specifies key exchange algorithm RSA, data encryption algorithm 128-bit RC4, and the MAC algorithm MD5.

rsa_rc4_128_sha: Specifies key exchange algorithm RSA, data encryption algorithm 128-bit RC4, and MAC algorithm SHA.

Usage guidelines

SSL employs the following algorithms:

·     Data encryption algorithms—Encrypt data to ensure privacy. Commonly used data encryption algorithms are usually symmetric key algorithms, such as DES_CBC, 3DES_EDE_CBC, AES_CBC, and RC4. When using a symmetric key algorithm, the SSL server and the SSL client must use the same key.

·     Message Authentication Code (MAC) algorithms—Calculate the MAC value for data to ensure integrity. Commonly used MAC algorithms include MD5 and SHA. When using a MAC algorithm, the SSL server and the SSL client must use the same key.

·     Key exchange algorithms—Implement secure exchange of the keys used by the symmetric key algorithm and the MAC algorithm. Commonly used key exchange algorithms are usually asymmetric key algorithms, such as RSA.

After the SSL server receives a cipher suite from a client, the server matches the received cipher suite against the cipher suits it supports. If a match is found, the cipher suite negotiation succeeds. Otherwise, the negotiation fails.

If you execute this command multiple times, the most recent configuration takes effect.

Examples

# Configure SSL server policy policy1 to support the following cipher suites:

·     Key exchange algorithm DHE RSA, data encryption algorithm 128-bit AES, and MAC algorithm SHA.

·     Key exchange algorithm RSA, data encryption algorithm 128-bit AES, and MAC algorithm SHA.

<Sysname> system-view

[Sysname] ssl server-policy policy1

[Sysname-ssl-server-policy-policy1] ciphersuite dhe_rsa_aes_128_cbc_sha rsa_aes_128_cbc_sha

Related commands

·     display ssl server-policy

·     prefer-cipher

client-verify

Use client-verify to enable mandatory or optional SSL client authentication.

Use undo client-verify to restore the default.

Syntax

client-verify { enable | optional }

undo client-verify [ enable ]

Default

SSL client authentication is disabled. The SSL server does not authenticate SSL clients based on digital certificates.

Views

SSL server policy view

Predefined user roles

network-admin

Parameters

enable: Enables mandatory SSL client authentication.

optional: Enables optional SSL client authentication.

Usage guidelines

SSL uses digital certificates to authenticate communicating parties. For more information about digital certificates, see Security Configuration Guide.

Mandatory SSL client authentication—The SSL server requires an SSL client to submit its digital certificate for identity authentication. The SSL client can access the SSL server only after it passes identity authentication.

Optional SSL client authentication—The SSL server does not require an SSL client to submit its digital certificate for identity authentication.

·     If an SSL client submits its certificate to the SSL server, the server authenticates the client identity. The client must pass authentication to access the server.

·     If an SSL client does not submit its certificate to the SSL server, the server does not authenticate the client identity. The client can access the SSL server without authentication.

If SSL client authentication is disabled, the SSL server does not authenticate SSL clients regardless of whether the clients submit digital certificates or not. SSL clients can access the SSL server without authentication.

When authenticating a client by using the digital certificate, the SSL server performs the following operations:

·     Verifies the certificate chain presented by the client.

·     Checks that the certificates in the certificate chain (except the root CA certificate) are not revoked.

Examples

# Enable mandatory SSL client authentication.

<Sysname> system-view

[Sysname] ssl server-policy policy1

[Sysname-ssl-server-policy-policy1] client-verify enable

# Enable optional SSL client authentication.

<Sysname> system-view

[Sysname] ssl server-policy policy1

[Sysname-ssl-server-policy-policy1] client-verify optional

# Disable SSL client authentication.

<Sysname> system-view

[Sysname] ssl server-policy policy1

[Sysname-ssl-server-policy-policy1] undo client-verify

Related commands

display ssl server-policy

display ssl client-policy

Use display ssl client-policy to display SSL client policy information.

Syntax

display ssl client-policy [ policy-name ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

policy-name: Specifies an SSL client policy by its name, a case-insensitive string of 1 to 31 characters. If you do not specify a policy name, this command displays information about all SSL client policies.

Examples

# Display information about the SSL client policy policy1.

<Sysname> display ssl client-policy policy1

 SSL client policy: policy1

     SSL version: SSL 3.0

     PKI domain: client-domain

     Preferred ciphersuite:

         RSA_AES_128_CBC_SHA

     Server-verify: enabled

Table 1 Command output

Field

Description

Server-verify

Indicates whether the client is enabled to use digital certificates to authenticate servers.

 

display ssl server-policy

Use display ssl server-policy to display SSL server policy information.

Syntax

display ssl server-policy [ policy-name ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

policy-name: Specifies an SSL server policy by its name, a case-insensitive string of 1 to 31 characters. If you do not specify a policy name, this command displays information about all SSL server policies.

Examples

# Display information about SSL server policy policy1.

<Sysname> display ssl server-policy policy1

 SSL server policy: policy1

     PKI domain: server-domain

     Ciphersuites:

         DHE_RSA_AES_128_CBC_SHA

         RSA_AES_128_CBC_SHA

     Session cache size: 600

     Caching timeout: 3600 seconds

     Client-verify: Enabled

Table 2 Command output

Field

Description

Caching timeout

Session cache timeout time in seconds.

Client-verify

SSL client authentication mode, including:

·     Disabled—SSL client authentication is disabled.

·     Enabled—SSL client authentication is mandatory.

·     Optional—SSL client authentication is optional.

 

pki-domain

Use pki-domain to specify a PKI domain for an SSL client policy or an SSL server policy.

Use undo pki-domain to restore the default.

Syntax

pki-domain domain-name

undo pki-domain

Default

No PKI domain is specified for an SSL client policy or an SSL server policy.

Views

SSL client policy view

SSL server policy view

Predefined user roles

network-admin

Parameters

domain-name: Specifies a PKI domain by its name, a case-insensitive string of 1 to 31 characters.

Usage guidelines

If you specify a PKI domain for an SSL client policy, the SSL client that uses the SSL client policy will obtain its digital certificate through the specified PKI domain.

If you specify a PKI domain for an SSL server policy, the SSL server that uses the SSL server policy will obtain its digital certificate through the specified PKI domain.

Examples

# Specify PKI domain client-domain for SSL client policy policy1.

<Sysname> system-view

[Sysname] ssl client-policy policy1

[Sysname-ssl-client-policy-policy1] pki-domain client-domain

# Specify PKI domain server-domain for SSL server policy policy1.

<Sysname> system-view

[Sysname] ssl server-policy policy1

[Sysname-ssl-server-policy-policy1] pki-domain server-domain

Related commands

·     display ssl client-policy

·     display ssl server-policy

·     pki domain

prefer-cipher

Use prefer-cipher to specify a preferred cipher suite for an SSL client policy.

Use undo prefer-cipher to restore the default.

Syntax

prefer-cipher { dhe_rsa_aes_128_cbc_sha | dhe_rsa_aes_256_cbc_sha | exp_rsa_des_cbc_sha | exp_rsa_rc2_md5 | exp_rsa_rc4_md5 | rsa_3des_ede_cbc_sha | rsa_aes_128_cbc_sha | rsa_aes_256_cbc_sha | rsa_des_cbc_sha | rsa_rc4_128_md5 | rsa_rc4_128_sha }

undo prefer-cipher

Default

The preferred cipher suite of an SSL client policy is rsa_rc4_128_md5.

Views

SSL client policy view

Predefined user roles

network-admin

Parameters

dhe_rsa_aes_128_cbc_sha: Specifies key exchange algorithm DHE RSA, data encryption algorithm 128-bit AES, and MAC algorithm SHA.

dhe_rsa_aes_256_cbc_sha: Specifies key exchange algorithm DHE RSA, data encryption algorithm 256-bit AES, and MAC algorithm SHA.

exp_rsa_des_cbc_sha: Specifies the export cipher suite that uses key exchange algorithm RSA, data encryption algorithm DES_CBC, and MAC algorithm SHA.

exp_rsa_rc2_md5: Specifies the export cipher suite that uses key exchange algorithm RSA, data encryption algorithm RC2, and MAC algorithm MD5.

exp_rsa_rc4_md5: Specifies the export cipher suite that uses key exchange algorithm RSA, data encryption algorithm RC4, and MAC algorithm MD5.

rsa_3des_ede_cbc_sha: Specifies key exchange algorithm RSA, data encryption algorithm 3DES_EDE_CBC, and MAC algorithm SHA.

rsa_aes_128_cbc_sha: Specifies key exchange algorithm RSA, data encryption algorithm 128-bit AES_CBC, and MAC algorithm SHA.

rsa_aes_256_cbc_sha: Specifies key exchange algorithm RSA, data encryption algorithm 256-bit AES_CBC, and MAC algorithm SHA.

rsa_des_cbc_sha: Specifies key exchange algorithm RSA, data encryption algorithm DES_CBC, and MAC algorithm SHA.

rsa_rc4_128_md5: Specifies key exchange algorithm RSA, data encryption algorithm 128-bit RC4, and MAC algorithm MD5.

rsa_rc4_128_sha: Specifies key exchange algorithm RSA, data encryption algorithm 128-bit RC4, and MAC algorithm SHA.

Usage guidelines

SSL employs the following algorithms:

·     Data encryption algorithms—Encrypt data to ensure privacy. Commonly used data encryption algorithms are usually symmetric key algorithms, such as DES_CBC, 3DES_EDE_CBC, AES_CBC, and RC4. When using a symmetric key algorithm, the SSL server and the SSL client must use the same key.

·     Message Authentication Code (MAC) algorithms—Calculate the MAC value for data to ensure integrity. Commonly used MAC algorithms include MD5 and SHA. When using a MAC algorithm, the SSL server and the SSL client must use the same key.

·     Key exchange algorithms—Implement secure exchange of the keys used by the symmetric key algorithm and the MAC algorithm. Commonly used key exchange algorithms are asymmetric key algorithms, such as RSA.

The SSL client sends the preferred cipher suite to the SSL server, the server matches the received cipher suite against the cipher suits it supports. If a match is found, the cipher suite negotiation succeeds. Otherwise, the negotiation fails.

If you execute this command multiple times, the most recent configuration takes effect.

Examples

# Configure SSL client policy policy1 to support key exchange algorithm RSA, data encryption algorithm 128-bit AES_CBC, and MAC algorithm SHA.

<Sysname> system-view

[Sysname] ssl client-policy policy1

[Sysname-ssl-client-policy-policy1] prefer-cipher rsa_aes_128_cbc_sha

Related commands

·     ciphersuite

·     display ssl client-policy

server-verify enable

Use server-verify enable to enable the SSL client to use digital certificates to authenticate SSL servers.

Use undo server-verify enable to disable authentication. That is, the client does not authenticate any server.

Syntax

server-verify enable

undo server-verify enable

Default

The SSL client uses digital certificates to authenticate SSL servers.

Views

SSL client policy view

Predefined user roles

network-admin

Usage guidelines

The SSL client and server use digital certificates to authenticate each other. For more information about digital certificates, see Security Configuration Guide.

If you execute the server-verify enable command, an SSL server must send its digital certificate to the SSL client for authentication. The client can access the SSL server only after the server passes the authentication.

Examples

# Enable the SSL client to use digital certificates to authenticate SSL servers.

<Sysname> system-view

[Sysname] ssl client-policy policy1

[Sysname-ssl-client-policy-policy1] server-verify enable

Related commands

display ssl client-policy

session

Use session to set the maximum number of sessions that the SSL server can cache and the timeout time for cached sessions.

Use undo session to restore the default.

Syntax

session { cachesize size | timeout time } *

undo session { cachesize | timeout } *

Default

The SSL server can cache a maximum of 500 sessions, and the timeout time for cached sessions is 3600 seconds.

Views

SSL server policy view

Predefined user roles

network-admin

Parameters

cachesize size: Sets the maximum number of cached sessions, in the range of 100 to 20480.

timeout time: Sets the session cache timeout in the range of 1 to 4294967295 seconds.

Usage guidelines

The SSL server caches SSL sessions to reuse negotiated session parameters to simplify SSL handshake. Use this command to limit the maximum number and timeout time for cached sessions. When the number of cached sessions reaches the maximum, SSL does not cache new sessions. When the timeout timer for a cached session expires, SSL deletes the session.

Examples

# Set the maximum number of cached sessions to 600, and the timeout time for cached sessions to 1800 seconds.

<Sysname> system-view

[Sysname] ssl server-policy policy1

[Sysname-ssl-server-policy-policy1] session cachesize 600 timeout 1800

Related commands

display ssl server-policy

ssl client-policy

Use ssl client-policy to create an SSL client policy and enter SSL client policy view.

Use undo ssl client-policy to delete an SSL client policy.

Syntax

ssl client-policy policy-name

undo ssl client-policy policy-name

Default

No SSL client policy exists on the device.

Views

System view

Predefined user roles

network-admin

Parameters

policy-name: Specifies an SSL client policy by its name, a case-insensitive string of 1 to 31 characters.

Usage guidelines

This command creates an SSL client policy for which you can configure SSL parameters that the client uses to establish a connection to the server. The parameters include a PKI domain and a preferred cipher suite. An SSL client policy takes effect only after it is associated with an application such as DDNS.

Examples

# Create SSL client policy policy1 and enter SSL client policy view.

<Sysname> system-view

[Sysname] ssl client-policy policy1

[Sysname-ssl-client-policy-policy1]

Related commands

display ssl client-policy

ssl renegotiation disable

Use ssl renegotiation disable to disable SSL session renegotiation.

Use undo ssl renegotiation disable to restore the default.

Syntax

ssl renegotiation disable

undo ssl renegotiation disable

Default

SSL session renegotiation is enabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

The SSL session renegotiation feature enables the SSL client and server to reuse a previously negotiated SSL session for an abbreviated handshake.

Disabling session renegotiation causes more computational overhead to the system but it can avoid potential risks. Disable SSL session renegotiation only when explicitly required.

Examples

#Disable SSL session renegotiation.

<Sysname> system-view

[Sysname] ssl renegotiation disable

ssl server-policy

Use ssl server-policy to create an SSL server policy and enter SSL server policy view.

Use undo ssl server-policy to delete an SSL server policy.

Syntax

ssl server-policy policy-name

undo ssl server-policy policy-name

Default

No SSL server policy exists on the device.

Views

System view

Predefined user roles

network-admin

Parameters

policy-name: Specifies a name for the SSL server policy, a case-insensitive string of 1 to 31 characters.

Usage guidelines

This command creates an SSL server policy for which you can configure SSL parameters such as a PKI domain and supported cipher suits. An SSL server policy takes effect only after it is associated with an application such as HTTPS.

Examples

# Create SSL server policy policy1 and enter SSL server policy view.

<Sysname> system-view

[Sysname] ssl server-policy policy1

[Sysname-ssl-server-policy-policy1]

Related commands

display ssl server-policy

ssl version ssl3.0 disable

Use ssl version ssl3.0 disable to disable SSL 3.0 on the device.

Use undo ssl version ssl3.0 disable restore the default.

Syntax

ssl version ssl3.0 disable

undo ssl version ssl3.0 disable

Default

SSL 3.0 is enabled.

Views

System view

Predefined user roles

network-admin

Usage guidelines

Use this command to disable SSL 3.0 on a device to enhance system security.

·     An SSL server supports only TLS 1.0 after SSL 3.0 is disabled.

·     An SSL client always uses SSL 3.0 if SSL 3.0 is specified for the client policy, whether you disable SSL 3.0 or not.

To ensure successful establishment of an SSL connection, do not disable SSL 3.0 on a device when the peer device only supports SSL 3.0. As a best practice to improve security, upgrade the peer device to support TLS 1.0.

Examples

# Disable SSL 3.0 on the device.

<Sysname> system-view

[Sysname] ssl version ssl3.0 disable

version

Use version to specify an SSL protocol version for an SSL client policy.

Use undo version to restore the default.

Syntax

version { ssl3.0 | tls1.0 }

undo version

Default

The SSL protocol version for an SSL client policy is TLS 1.0.

Views

SSL client policy view

Predefined user roles

network-admin

Parameters

ssl3.0: Specifies SSL 3.0.

tls1.0: Specifies TLS 1.0.

Usage guidelines

If you execute this command multiple times, the most recent configuration takes effect.

You can specify SSL 3.0 or TLS 1.0 for an SSL client policy:

·     If TLS 1.0 is specified and SSL 3.0 is not disabled, the client first uses TLS 1.0 to connect to the SSL server. If the connection attempt fails, the client uses SSL 3.0.

·     If TLS 1.0 is specified and SSL 3.0 is disabled, the client only uses TLS 1.0 to connect to the SSL server.

·     If SSL 3.0 is specified, the client uses SSL 3.0 to connect to the SSL server, whether you disable SSL 3.0 or not.

As a best practice to enhance system security, disable SSL 3.0 on the device and specify TLS 1.0 for an SSL client policy.

Examples

# Set the SSL protocol version to TLS 1.0 for SSL client policy policy1.

<Sysname> system-view

[Sysname] ssl client-policy policy1

[Sysname-ssl-client-policy-policy1] version tls1.0

Related commands

display ssl client-policy