Re: [rtcweb] I-D Action: draft-hutton-rtcweb-nat-firewall-considerations-00.txt
Hadriel Kaplan <HKaplan@acmepacket.com> Tue, 12 March 2013 19:37 UTC
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From: Hadriel Kaplan <HKaplan@acmepacket.com>
To: Harald Alvestrand <harald@alvestrand.no>
Thread-Topic: [rtcweb] I-D Action: draft-hutton-rtcweb-nat-firewall-considerations-00.txt
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Date: Tue, 12 Mar 2013 19:37:38 +0000
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Cc: "<rtcweb@ietf.org>" <rtcweb@ietf.org>
Subject: Re: [rtcweb] I-D Action: draft-hutton-rtcweb-nat-firewall-considerations-00.txt
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On Mar 11, 2013, at 1:29 PM, Harald Alvestrand <harald@alvestrand.no> wrote: > On 03/11/2013 06:04 PM, Reinaldo Penno (repenno) wrote: >> Hello, >> >> Why not use Port Control Protocol (PCP) to control Firewalls and NATs >> explicitly? > We can switch to that as soon as 100% of firewalls support it - until then, we have to be able to rely on other techniques. Not to contradict with your point, but to pile on it... Even if 100% of the Firewalls were to support PCP, you'd still want to do STUN/TURN/ICE methinks, because 1) you never know that your local Firewall is the *only* Firewall-ish thing between you and the public Internet or some network reachable by both parties. This problem already happens with UPnP and NAT-PMP today, and has been noted before in BEHAVE or MMUSIC, I think. 2) There's a big difference between 100% of Firewalls implementing PCP, and it being actually enabled/turned-on in 100% of them. 3) you don't know if the IP path across the Internet works for a given address family - this has been given as the reason STUN/ICE needs to be required for v4/v6 dual-stack implementations, to test reachability across the IPv6 Internet before trying to use it; regardless of NATs/Firewalls. -hadriel
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Reinaldo Penno (repenno)
- [rtcweb] FW: I-D Action: draft-hutton-rtcweb-nat-… Hutton, Andrew
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Reinaldo Penno (repenno)
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Harald Alvestrand
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Reinaldo Penno (repenno)
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Cameron Byrne
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Hannes Tschofenig
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Reinaldo Penno (repenno)
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Simon Perreault
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Hutton, Andrew
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Reinaldo Penno (repenno)
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Harald Alvestrand
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Reinaldo Penno (repenno)
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Reinaldo Penno (repenno)
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Tirumaleswar Reddy (tireddy)
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Markus.Isomaki
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Cameron Byrne
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Tirumaleswar Reddy (tireddy)
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Cameron Byrne
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Reinaldo Penno (repenno)
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Tirumaleswar Reddy (tireddy)
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Muthu Arul Mozhi Perumal (mperumal)
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Harald Alvestrand
- Re: [rtcweb] FW: I-D Action: draft-hutton-rtcweb-… Roy, Radhika R CIV USARMY (US)
- Re: [rtcweb] I-D Action: draft-hutton-rtcweb-nat-… Hadriel Kaplan