Web access from several ip

Hello.

I use splunk free, and i want close access to splunk web to all, except several IP. Previously used. Htatstsess for similar purposes. But now is not installed apache, ngix and I do not know where to put it to block access to Splunk.

Or should I just put a web server and do the redirection? If someone podelits working solution will be immensely grateful.

Thx.