netreg Revisited

John Hascall john at
Tue Mar 22 18:02:52 UTC 2011

Our specific-to-ISU version of netreg uses omapi
to do host adding.  There are some tricky bits
  1) we had to modify dhcpd to NOT add the entry
     to the leases file (since we are adding it
     to the config file and duplicates are bad).
  2) We use class/subclasses to separate clients
     to verious service categories (different
     subnets on the "same wire").  We have been
     thus far unable to make omapi for for adding
     subclasses :( :( :(


> 	Some years ago, Carnegie Mellon University built a
> clever use of dhcp and DNS called netreg to authenticate clients
> who wanted to connect to their networks. It looks like nobody
> has done much to it since about 2005 and there is no mention of
> failover or omapi. All updates are done the old fashioned-way.
> Modify dhcpd.conf. Stop the server. Say a prayer and restart
> dhcpd.
> 	We've been asked to investigate netreg so I am asking
> whether there is a modernized version that exists and makes use
> of omapi for dynamic updates.
> 	The original idea was that each network had a small pool
> of dynamic leases with very short lifetimes. A client is sent to
> the authentication server and, if approved, he gets put in to
> the known pool. By using omapi, he could also be given a bootP
> entry if the magic between authentication and approval can do
> that.
> 	We are basically looking to make sure we don't re-envent
> any good wheels that have already been proven to roll.
> 	Thanks for all constructive ideas.
> Martin McCormick WB5AGZ  Stillwater, OK 
> Systems Engineer
> OSU Information Technology Department Telecommunications Services Group
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