Splunk® Enterprise

Securing Splunk Enterprise

Splunk Enterprise version 7.2 is no longer supported as of April 30, 2021. See the Splunk Software Support Policy for details. For information about upgrading to a supported version, see How to upgrade Splunk Enterprise.
This documentation does not apply to the most recent version of Splunk® Enterprise. For documentation on the most recent version, go to the latest release.

Validate your configuration

To verify your SSL connections in Splunk Web, try the following command:

index=_internal source=*metrics.log* group=tcpin_connections | 
dedup hostname | table _time hostname version sourceIp destPort ssl

You can also splunkd.log to validate and troubleshoot your configuration. Splunkd.log is located on your indexer and forwarder at $SPLUNK_HOME/var/log/splunk/splunkd.log.

On the indexer, look for the following or similar messages at the start-up sequence to verify a successful connection:

02-06-2011 19:19:01.552 INFO TcpInputProc - using queueSize 1000
02-06-2011 19:19:01.552 INFO TcpInputProc - SSL cipherSuite=ALL:!aNULL:!eNULL:!LOW:!EXP:
RC4+RSA:+HIGH:+MEDIUM

02-06-2011 19:19:01.552 INFO TcpInputProc - supporting SSL v2/v3

02-06-2011 19:19:01.555 INFO TcpInputProc - port 9997 is reserved for splunk 2 splunk (SSL)

02-06-2011 19:19:01.555 INFO TcpInputProc - Port 9997 is compressed

02-06-2011 19:19:01.556 INFO TcpInputProc - Registering metrics callback for: tcpin_connections

On the forwarder, look for the following or similar messages at the start-up sequence to verify a successful connection:

TcpOutputProc - Retrieving configuration from properties

TcpOutputProc - Using SSL for server 10.1.12.112:9997, clientCert=/opt/splunk/etc/auth/server.pem

TcpOutputProc - ALL Connections will use SSL with sslCipher=

TcpOutputProc - initializing single connection with retry strategy for 10.1.12.112:9997

Below is how a successful connection might appear in splunkd.log on the indexer:

TcpInputProc - Connection in cooked mode from 10.1.12.111

TcpInputProc - Valid signature found

TcpInputProc - Connection accepted from 10.1.12.111

Below is how a successful connection might appear in splunkd.log on the forwarder:

TcpOutputProc - attempting to connect to 10.1.12.112:9997...

TcpOutputProc - Connected to 10.1.12.112:9997

You can also check metrics.log for something similar to the following:

index=_internal host=heavy hostname=universal | stats last(connectionType) as connectionType

For help troubleshooting your configuration issues, see Troubleshoot your forwarder to indexer configuration in this manual.

Last modified on 19 October, 2022
Configure Splunk forwarding to use your own SSL certificates   Troubleshoot your forwarder to indexer authentication

This documentation applies to the following versions of Splunk® Enterprise: 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, 7.0.9, 7.0.10, 7.0.11, 7.0.13, 7.1.0, 7.1.1, 7.1.2, 7.1.3, 7.1.4, 7.1.5, 7.1.6, 7.1.7, 7.1.8, 7.1.9, 7.1.10, 7.2.0, 7.2.1, 7.2.2, 7.2.3, 7.2.4, 7.2.5, 7.2.6, 7.2.7, 7.2.8, 7.2.9, 7.2.10, 7.3.0, 7.3.1, 7.3.2, 7.3.3, 7.3.4, 7.3.5, 7.3.6, 7.3.7, 7.3.8, 7.3.9, 8.0.0, 8.0.1, 8.0.2, 8.0.3, 8.0.4, 8.0.5, 8.0.6, 8.0.7, 8.0.8, 8.0.9, 8.0.10, 8.1.0, 8.1.1, 8.1.2, 8.1.3, 8.1.4, 8.1.5, 8.1.6, 8.1.7, 8.1.8, 8.1.9, 8.1.10, 8.1.11, 8.1.12, 8.1.13, 8.1.14, 8.2.0, 8.2.1, 8.2.2, 8.2.3, 8.2.4, 8.2.5, 8.2.6, 8.2.7, 8.2.8, 8.2.9, 8.2.10, 8.2.11, 8.2.12


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