Subject: RE: [Sip] PING/PONG

From: "Christian Stredicke" <[email-masked]>
Date: Wed, 17 Nov 2004 18:57:35 +0100

Well, thats a good question. I think everybody should prepare their
server for responding to STUN requests on the SIP port. We do since two
years.-)

CS 

> -----Original Message-----
> From: Steve Langstaff [mailto:[email-masked]] 
> Sent: Wednesday, November 17, 2004 12:16 PM
> To: Jonathan Rosenberg; Christian Stredicke
> Cc: [email-masked]
> Subject: RE: [Sip] PING/PONG
> 
> Should point 2 read "The user agent server indicates if it 
> can respond to client refresh requests"?
> 
> --
> Steve Langstaff.
> 
> 
> -----Original Message-----
> From: [email-masked] [mailto:[email-masked]]On 
> Behalf Of Jonathan Rosenberg
> Sent: 17 November 2004 16:40
> To: Christian Stredicke
> Cc: [email-masked]
> Subject: Re: [Sip] PING/PONG
> 
> 
> 
> 
> Christian Stredicke wrote:
> 
> > So my understanding is:
> > 
> > 1. We should use *only* STUN for refreshing bindings (either UDP or 
> > TCP, what about TLS)
> 
> Yes, TLS too. TLS runs ontop of TCP after all.
> 
> > 
> > 2. The user agent indicates if it can do it (no negotiation on
> > capabilities)
> > 
> > 3. Refreshing must be done from the client
> > 
> > Can we agree on that?
> 
> Yes.
> 
> Server originating refreshing is in the wrong direction. It 
> is the client utilizing the service; if it wishes to make use 
> of that service, it has to be responsible for refreshing the 
> connection.
> 
> -Jonathan R.
> 
> -- 
> Jonathan D. Rosenberg, Ph.D.                   600 Lanidex Plaza
> Director, Service Provider VoIP Architecture   Parsippany, NJ 
> 07054-2711
> Cisco Systems
> [email-masked]                              FAX:   (973) 952-5050
> http://www.jdrosen.net                         PHONE: (973) 952-5000
> http://www.cisco.com
> 
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> 
> 

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