Re: [Int-area] Discovering a Location Server in the Access Network

Alexandru Petrescu wrote:
> 
> Hannes Tschofenig wrote:
>>>>
>>>>  In short, the current proposal (see 
>>>> http://tools.ietf.org/html/draft-thomson-geopriv-lis-discovery-02.txt;
>>>>  ignoring Section 2 which defines the DHCP portion) essentially does 
>>>> the following:
>>>>
>>>> * Discover the public IP address of the end point
>>>
>>> I think it should say 'Discover ... address of the LIS', right?   And
>>> not 'of the end point'(?)
>>>
>> No; it really means that you learn your own public IP address. That's 
>> no problem if you already have one but you might also be behind a NAT 
>> (which is extremely common in a DSL network). Hence, knowing your 
>> private IP address is not very useful for the discovery of the LIS 
>> since you will not find a LIS in your own home network.
> 
> But you're sure that it's necessary to discover my IP address when I'm 
> behind NAT?  Does the LIS need to contact me without me needing to 
> contact it first?

What I understood from the first mail sent by Hannes is that discovery 
of the public address is necessary for the next step (i.e. DNS reverse 
lookup) to work. If there is other way to get the address of LIS without 
going through presented steps, then that is just yet another alternative.

Regards

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