ISP customer assignments

Mon Oct 5 18:38:50 UTC 2009

On Oct 5, 2009, at 2:10 PM, Brian Johnson wrote:

> What would be "wrong" with using a /64 for a customer who only has a
> local network? Most home users won't understand what a subnet is.

They probably don't -- but some appliance they buy might.  Maybe some  
home "family-oriented" box will put the kids' machines on a separate  
VLAN, to permit rate-limiting, port- and destination-filtering, time- 
of-day limits, etc.  In the past, I had to do similar things -- no AIM  
during homework hours, no file-sharing -- to the point that I had four  
subnets in my house (wireless, teen-net, workVPN, and backbone/ 
parents).  I don't expect the average consumer to set up something  
like that, but I sure wouldn't be surprised at appliances that did.

		--Steve Bellovin, http://www.cs.columbia.edu/~smb