Is it possible to configure Splunk to support HTTP Strict Transport Security (HSTS)?

[amoldesai]

Hi,

We have a requirement from our security team to have Splunk support HSTS feature. Can this be done?

I have seen configuration for other servers like Apache 2 at https://raymii.org/s/tutorials/HTTP_Strict_Transport_Security_for_Apache_NGINX_and_Lighttpd.html

How can we configure Splunk server to support it?

Please let me know.

Thanks,

-Amol

[AllenMaria]

By default, Splunk does not enable HSTS automatically. However, you can add the HSTS header manually by configuring a reverse proxy (like NGINX or Apache) in front of your Splunk web interface. The proxy can handle HTTPS and send the HSTS response header to clients. This setup helps meet security requirements while keeping Splunk accessible and secure. 

[haraksin]

In case anyone else is wondering the answer to this question, there is now a way to do this deployment-wide as of version 4.*

Set the following flag globally in $SPLUNK_HOME/etc/system/local/web.conf (under [settings] stanza) and in $SPLUNK_HOME/etc/system/local/server.conf (in [default] stanza):

sendStrictTransportSecurityHeader = true

[Jeremiah]

If you want to add custom headers to Splunk, your best bet is probably to front-end Splunk with Apache or Nginx. Also note that if you enable SSL on Splunkweb, there is no non-ssl port.

https://answers.splunk.com/answers/5465/how-to-access-splunk-web-interface-behind-nginx.html