I an not very familiar with solr. I have installed solr successfully. It is using jetty webserver. My solr version is 4.10.3. It admin page is not protected by password. Any
I have just to inform what was solution in my case. Actually my website was written in ajax that's why by setting passowrd also protect my website. So its not the solution in case where solr has to be used by open internet. So its best solution as guided by solr wiki is to use proxies like node.js, nginex etc. as given here
Using node.js proxy and applying iptable rules ( as guided above) solve my problem.