# Managing subscribers

When you're an ISP offering access to the Internet, you need to keep track of a number of things.

* Which address space is assigned to who.
* Forward DNS entries, reverse DNS entries with possible delegation.
* Per-customer consumed bandwidth.  This can be useful if a subscriber keeps sucking up transit bandwidth, which may end up being deadly expensive for a small ISP.
* Payment history, in case it's not fully automated already. 

Don't forget that subscribers may wish to view/change information themselves (bandwidth graph, DNS delegation, etc).

For all these tasks, you need some kind of software.

## Possible backends

* LDAP

## Existing solutions

* FDN system, written in Perl and only masterable by experienced Gurus
* [[https://atelier.gresille.org/projects/ambre/activity|Ambre]], developped in 2013 by [[http://www.rezine.org/|Rézine]] (Eastern France). Ruby on Rails.
* [[https://code.ffdn.org/FFDN/coin|COIN]], being developed by Illyse in France. Written in Django, with a generic backend system (for now, OpenVPN backend through LDAP). In English as much as possible, but some French may remain.
* [[http://www.ffdn.org/wiki/doku.php?id=documentation&#programmes_scripts|Other tools by FFDN members]], in French

# Provisioning

This is the process of assigning configuration to the end-user equipment (CPE). This includes IPv4 and IPv6 ranges, DNS servers, NTP servers, and so on.

* [[https://en.wikipedia.org/wiki/RADIUS|Radius]] is pretty common
* https://en.wikipedia.org/wiki/TR-069