[arin-ppml] inevitability of NAT?

Scott Helms khelms at zcorum.com
Thu Feb 10 09:41:36 EST 2011

> They work through CONSUMER NAT because consumer NAT has nat traversal facilities like uPNP.
> LSN/CGNAT is a whole different ballgame.

Lets step back a moment.  Why is LSN/CGNAT different from consumer NAT?  
Is it only because of a perceived lack of knobs?

If I am going to explain to a CFO that "CGNAT is bad" I have to 
articulate exactly why its bad.  While I don't know if this is the case 
or not there is no reason that the CGNAT vendors can't expose to end 
users the ability create forwarding rules based on user profiles (could 
be stored in TR-069, RADIUS, DHCP, LDAP, or even DDNS).  I may be naive 
here because I haven't actually verified with Cisco and the others that 
they are planning this but if their product managers missed something 
that obvious I will be greatly surprised.  While UPnP will not  be part 
of that solution for obvious reasons building a web page that works with 
some sort of storage directory is trivial.

Scott Helms
Vice President of Technology
ISP Alliance, Inc. DBA ZCorum
(678) 507-5000

More information about the ARIN-PPML mailing list