Splunk® Enterprise

Securing Splunk Enterprise

Download manual as PDF

Download topic as PDF

About TLS encryption and cipher suites

As of version 6.6., Splunk provides the following default cipher suites and TLS encryption.

alert_actions.conf

sslVersions = tls1.2

cipherSuite = 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

ecdhCurves = prime256v1, secp384r1, secp521r1

This configuration does not support Windows Server 2008 R2. To add support for Windows Server 2008 R2:

1. Set sslVersions to tls

2. Add the following ciphers to the end of the existing cipherSuite:

ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES128-SHA:
ECDHE-RSA-AES128-SHA

To enable TLS 1.2 support on Windows Server 2008 R2:

1. Add key to the registry:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server

2. In the TLS 1.2\Server key, create the following:

DWORD (32-bit) Value – DisabledByDefault; set to 0

DWORD (32-bit) Value – Enabled; set to 1

3. Restart Windows

See: https://technet.microsoft.com/en-us/library/dn786418(v=ws.11).aspx#BKMK_SchannelTR_TLS12 for more information.

inputs.conf

sslVersions = tls1.2

cipherSuite = 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

ecdhCurves = prime256v1, secp384r1, secp521r1

This configuration does not support Splunk 5.x. To add support for Splunk 5.x:

1. Set sslVersions = tls

2. Add the following ciphers to the end of the existing cipherSuite:

DHE-RSA-AES256-SHA:AES256-SHA:DHE-RSA-AES128-SHA:AES128-SHA:
AES256-SHA:AES128-SHA

outputs.conf

sslVersions = tls1.2

cipherSuite = 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

ecdhCurves = prime256v1, secp384r1, secp521r1

This configuration does not support Splunk 5.x. To add support for Splunk 5.x:

1. Set sslVersions to tls

2. Add the following ciphers to the end of the existing cipherSuite:

DHE-RSA-AES256-SHA:AES256-SHA:DHE-RSA-AES128-SHA:AES128-SHA:
AES256-SHA:AES128-SHA

server.conf

sslVersions = tls1.2

sslVersionsForClient = tls1.2

cipherSuite = 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:AES256-GCM-SHA384:AES128-GCM-SHA256:AES128-SHA256

ecdhCurves = prime256v1, secp384r1, secp521r1

This configuration does not support Splunk 5.x. To add support for Splunk 5.x:

1. Set sslVersions = tls

2. Set sslVersionsForClient = tls

3. Append AES256-SHA to the existing cipherSuite.

applicationsManagement

sslVersions = tls1.2

cipherSuite = 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

ecdhCurves = prime256v1, secp384r1, secp521r1

This configuration does not support Splunk 5.x. To add support for Splunk 5.x:

1. Set sslVersions = tls

2. Add the following ciphers to the end of the existing cipherSuite:

DHE-RSA-AES256-SHA:AES256-SHA:DHE-RSA-AES128-SHA:AES128-SHA:
AES256-SHA:AES128-SHA

web.conf

sslVersions = tls1.2

cipherSuite = 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

ecdhCurves = prime256v1, secp384r1, secp521r1

This configuration does not support Windows Vista. To add support for Windows Vista:

1. Set sslVersions = tls

2. Add the following ciphers to the existing cipherSuite:

ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES128-SHA:
ECDHE-RSA-AES128-SHA

ldap.conf

TLS_PROTOCOL_MIN: 3.1 for TLSv1.0, 3.2 for TLSv1.1, 3.3 for TLSv1.2.

TLS_PROTOCOL_MIN 3.3

TLS_CIPHER_SUITE 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

This configuration does not support Windows Server 2008 R2. To add support for Windows Server 2008 R2:

1. Set TLS_PROTOCOL_MIN = TLS1.0/SSL3.1

2. Add the following ciphers to the existing TLS_CIPHER_SUITE:

ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES128-SHA:
ECDHE-RSA-AES128-SHA

To enable TLS 1.2 support on Windows Server 2008 R2:

1. Add key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server

2. In the TLS 1.2\Server key, create the following:

DWORD (32-bit) Value – DisabledByDefault; set to 0

DWORD (32-bit) Value – Enabled; set to 1

3. Restart Windows. See: https://technet.microsoft.com/en-us/library/dn786418(v=ws.11).aspx#BKMK_SchannelTR_TLS12 for more information.

PREVIOUS
Secure your admin account
  NEXT
Securing Splunk Enterprise with FIPS

This documentation applies to the following versions of Splunk® Enterprise: 6.6.0, 6.6.1, 6.6.2, 6.6.3, 6.6.4, 6.6.5, 6.6.6, 6.6.7, 6.6.8, 6.6.9, 6.6.10, 6.6.11, 7.0.0, 7.0.1, 7.0.2, 7.0.3, 7.0.4, 7.0.5, 7.0.6, 7.0.7, 7.0.8, 7.1.0, 7.1.1, 7.1.2, 7.1.3, 7.1.4, 7.1.5, 7.2.0, 7.2.1


Was this documentation topic helpful?

Enter your email address, and someone from the documentation team will respond to you:

Please provide your comments here. Ask a question or make a suggestion.

You must be logged into splunk.com in order to post comments. Log in now.

Please try to keep this discussion focused on the content covered in this documentation topic. If you have a more general question about Splunk functionality or are experiencing a difficulty with Splunk, consider posting a question to Splunkbase Answers.

0 out of 1000 Characters