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How to restrict all user logins to TLS1 cypher

Splunk Employee
Splunk Employee

Attempting to have users login into Splunk using TLSv1 for FIPS 140-2 requirement
-unsuccessful to date - still allowing ALL in.

We have updated the web.conf and server.conf files with: cipherSuite = TLSv1

Is this an issue with openssl, or a splunk issue?

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Re: How to restrict all user logins to TLS1 cypher

Splunk Employee
Splunk Employee

This seems to be a Splunk issue -

Steps below identify how to correct.

(Identify strong 128 bit tls1 ciphers to use)

openssl ciphers -tls1

DHE-RSA-AES256-SHA:DHE-DSS-AES256-SHA:DHE-RSA-CAMELLIA256-SHA:DHE-DSS-CAMELLIA256-SHA:AES256-SHA:CAMELLIA256-SHA:PSK-AES256-CBC-SHA:EDH-RSA-DES-CBC3-SHA:EDH-DSS-DES-CBC3-SHA:DES-CBC3-SHA:PSK-3DES-EDE-CBC-SHA:KRB5-DES-CBC3-SHA:KRB5-DES-CBC3-MD5:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA:DHE-RSA-SEED-SHA:DHE-DSS-SEED-SHA:DHE-RSA-CAMELLIA128-SHA:DHE-DSS-CAMELLIA128-SHA:AES128-SHA:SEED-SHA:CAMELLIA128-SHA:PSK-AES128-CBC-SHA:RC4-SHA:RC4-MD5:PSK-RC4-SHA:KRB5-RC4-SHA:KRB5-RC4-MD5:EDH-RSA-DES-CBC-SHA:EDH-DSS-DES-CBC-SHA:DES-CBC-SHA:KRB5-DES-CBC-SHA:KRB5-DES-CBC-MD5:EXP-EDH-RSA-DES-CBC-SHA:EXP-EDH-DSS-DES-CBC-SHA:EXP-DES-CBC-SHA:EXP-RC2-CBC-MD5:EXP-KRB5-RC2-CBC-SHA:EXP-KRB5-DES-CBC-SHA:EXP-KRB5-RC2-CBC-MD5:EXP-KRB5-DES-CBC-MD5:EXP-RC4-MD5:EXP-KRB5-RC4-SHA:EXP-KRB5-RC4-MD5

(Modify Splunk web.conf with common TLS and vendor recommended ciphers)

cd /opt/splunk/etc/system/local
vi web.conf

[settings]
enableSplunkWebSSL = 1
httpport = 8443
cipherSuite = TLS_RSA_WITH_AES_128_CBC_SHA:TLS_DHE_RSA_WITH_AES_128_CBC_SHA:TLS_DHE_DSS_WITH_AES_128_CBC_SHA:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA:DHE-RSA-SEED-SHA:DHE-RSA-CAMELLIA128-SHA:DHE-DSS-CAMELLIA128-SHA:AES128-SHA:SEED-SHA:CAMELLIA128-SHA:PSK-AES128-CBC-SHA

(Save, restart web services)

/opt/splunk/bin/splunk restart

(Test Browser SSL3 reject - Test Browser TLS1 accept)

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