[arin-ppml] inevitability of NAT?

Jack Bates jbates at brightok.net
Thu Feb 10 11:05:04 EST 2011

On 2/10/2011 9:42 AM, Benson Schliesser wrote:
> In the meantime, until PCP is available, users should consider
> turning off UPNP support in their gateway to make sure apps don't
> rely on it when they're behind a CGN.

User got a faulty DSL modem a few months back. uPNP wasn't enabled per 
the norm. User was unable to use some xbox functionality.

The degree at which things are depending on uPNP has grown to making it 
almost mandatory. Turning it off is likely to lead to things breaking. 
In addition, no protocol is going to fix LSN well. I don't think any 
studies have really been done to see at what scale applications are 
currently using uPNP to (port forward, open firewall). This places 
practical limits on the number of people doing a certain thing while 
behind a single IP.


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