Fw: Re: the requirements for NAT traversal ofH.323 multimedia systems

[Jianfang Li]

Dear Mr. Sakae:

I am so happy to receive much suggestion from you. 
And we will carefully think about all of these . 
The following is our some consideration for disscuss.
Thanks for your suggestion.


Best Regards

Jianfang Li

>>Thank you for your draft. Here are some suggestions for your 
>>consideration, mostly for clarifying the description.
>>
>>1/ I assume this document addresses requirements for the technical 
>>solution of H.323 NAT/firewall traversal, but some statements in 
>>Section 9 might be addressing requirements for the study (or 
>>guidelines), I feel. Though both are important, we need distinction.
>>

Ok. We will think carefully about how to solve this question.


>
>>2/ I see the following expressions that may already state solutions.
>>
>>- In order to simplify scenarios in figure 2, it is recommended all 
>>realm including GKs are connected by VPN. (Section 7.1)
>>- In these case , it is recommended that all GKs are connected by 
>>VPN, (Section 8.1.2)
>>- If  a  enterprise realm includes more than one GK, it is 
>>recommended that all realms including GKs are connected by VPN. 
>>(Section 8.2)
>>- If GKs is more than one realms, it is recommended that all realms 
>>including GKs are connected by VPN. (Section 9.1.1)
>>- If H.323 endpoints are in the same realm and in the same 
>>multi-level realm, it is recommended that media streams directly go 
>>through between H.323 endpoints.  (Section 9.3)
>>
>>I wonder if these are rather assumptions for this requirement document.
>>

Yes, Indeed, there maybe have some other solutions for these scenarios,
Therefore, we will revise them and provide no specific solution for them. 

>
>>3/ In each scenario of Section 8, there is a statement "Each H.323 
>>endpoint can act on a caller or a callee. " This looks the 
>>requirement for the NAT/firewall traversal. It could be stated in 
>>Section 9 like "Each H.323 endpoint shall be able to act as a caller 
>>or a callee."
>

Yes, It is right. We will add this basic requirement in section 9.

>>4/ I wonder if there are essential requirements (stated with "shall") 
>>and optional ones (stated with "should").
>

OK. we will state more carelly about  essential requirements by "Shall"and optional ones by "Should".
> 
>>
>>5/ I see the term "realm" is one of key words here. It should be 
>>defined in the terminology section and hopefully relevance to "zone" 
>>or "domain" used in other H.323 documents should be stated.
>

In this document, we use "realm" as many IETF documents do.
do you mean we should use "domain" or "zone" rather than "realm"?

>
>>
>>-- 
>>Best regards,
>>
>>OKUBO Sakae
>>e-mail: sokubo at waseda.jp
>>Visiting Professor
>>Graduate School of Science and Engineering
>>Waseda University
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