The map tiles on the default OSM homepage display the international borders of India as per the defacto ground situation (https://commons.wikimedia.org/wiki/File:India_disputed_areas_map.svg#Notes). To comply with Indian law, please use one of the OSM India tileservers or setup your own instance with the boundaries of J&K and Arunachal Pradesh as per the Survey of India (http://www.surveyofindia.gov.in/pages/display/190-public-awareness).

The link below describes the details process of :

https://github.com/azaadshatru/OSM

1. Building your own OSM Tile Server on Ubuntu.
2. Using OSMBright Stylesheets.
3. Loading India specific data to tile server.
4. Correcting Map of India.
5. Sample configuration files.