Subject: Re: [MMUSIC] RTSP through NATs

From: [email-masked]
Date: Mon, 13 Jan 2003 13:48:08 +0100

Magnus,

I will not be able to follow this teleconference,
however here is some input on RTSP & NATs

we have implemented STUN as a way to make RTSP with RTP/UDP transport work through NATS.

It works really fine (with a minor problem for long pauses).

Actually when comparing with ALGs I would rather strongly advocate for STUN,
to the point of discouraging ALG usage (as a cure for NAT)
to make a long story short it scales much better and
does not require *any* control on the NATs (vs install/run ALG).

regards,

Philippe Gentric
Software Architect
Philips MP4Net
[email-masked]
http://www.platform4.philips.com

                                                                                                                                              
                                                          To:   IETF MMUSIC WG <[email-masked]>                                              
                                                          cc:   (bcc: Philippe Gentric/MP4-SUR/CE/PHILIPS)                                    
                                                          Subject:    [MMUSIC] RTSP telecon 22 of january - Agenda                            
                                                                                                                                              
               Magnus Westerlund                          Classification:                                                                     
               <[email-masked]                                                                                                
               .se>                                                                                                                           
                                                                                                                                              
               Sent by:                                                                                                                       
               [email-masked]                                                                                                          
                                                                                                                                              
               13/01/2003 11:04                                                                                                               

Hi

In a little more than a week it is time for the next RTSP telecon. All
participants in last meeting will automatically receive conference
details in a few days. Others who wants to participate please send a
request to me.

---------------------------------
Agenda 22nd of January 2003
18.00-19.30 CET (GMT+1)

- Follow up on last telecon
  * 304 and REDIRECT "*" text proposal.

- Extension mechanism
  Read the parts in the draft that describes the different parts
  of the mechanism. For discussion: the whole solution
  * Feature tags
    - play.basic
    - registration
  * Require header
  * Proxy-require header
    - Shall it really require server to support these? See SIP, RFC
      3261 which uses Proxy-Require only for proxies.
  * Supported header
    - As in SIP?
    - Which methods, see table 4 & 5?
  * Unsupported header

- Options
  * Use of "Supported" header.
  * "*" URL and proxies

- Editorship of the draft

- In case we have time:
  * Use of destination parameter in Transport header:
    http://rtsp.org/bug507347

  * RTSP and NATs
    What solutions exist to make RTSP traverse NATs without
    ALG.
    http://rtsp.org/bug513888
    - STUN? See
    <http://www.ietf.org/internet-drafts/draft-ietf-midcom-stun-05.txt>
    - ALG recommendations?

- Next meeting

---------------------------------
Best Regards

Magnus Westerlund

Multimedia Technologies, Ericsson Research ERA/TVA/A
----------------------------------------------------------------------
Ericsson AB                | Phone +46 8 4048287
Torshamsgatan 23           | Fax   +46 8 7575550
S-164 80 Stockholm, Sweden | mailto: [email-masked]

_______________________________________________
mmusic mailing list
[email-masked]
https://www1.ietf.org/mailman/listinfo/mmusic

_______________________________________________
mmusic mailing list
[email-masked]
https://www1.ietf.org/mailman/listinfo/mmusic