Re: NATLL6 [was Re: Forwarding Packets With Link Local Destination Addresses]
Fernando Gont <fgont@si6networks.com> Fri, 08 January 2021 20:25 UTC
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Subject: Re: NATLL6 [was Re: Forwarding Packets With Link Local Destination Addresses]
To: Brian E Carpenter <brian.e.carpenter@gmail.com>, Alejandro Acosta <alejandroacostaalamo@gmail.com>, ipv6@ietf.org
References: <DM6PR05MB6348A18046C5DDC7CF2AED76AEAF0@DM6PR05MB6348.namprd05.prod.outlook.com> <561e3133-73c9-6ded-0311-838d5939dcd2@gmail.com> <605db208-e458-58ec-5872-932e0b9f9b38@gmail.com>
From: Fernando Gont <fgont@si6networks.com>
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Date: Fri, 08 Jan 2021 16:51:12 -0300
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On 8/1/21 16:37, Brian E Carpenter wrote: [...] >>> >>> I interpret this statement to include packets that contain routing headers. For example, it forbids an SRv6 packet whose final segment has a locator that begins with FE80. >>> >> In LACNIC we ran a project called Natmeter [1] for about 2 years, we obtained a lot of interesting data during this period [2]. >> >> The case is the following, we detected some end-user devices with only Link Local addresses (exactly, no GUA nor ULA) that were successfully natted and using the web. >> >> Is it ok?, do you consider it as a forwarding of a packet? was it a crazy result? (we saw few samples of this) > > NAT66 is not defined and not recommended, so there really isn't an answer to your questions. I can't think of a reason why such a hack wouldn't work, though. As long as the LL address is translated, it will not escape from the LAN. I would expect that something else (other than IPv6 NAT) is going on. IN that sense, it would be interesting to know more details about the methodology they employ to measure the use of NATs. Thanks! Regards, -- Fernando Gont SI6 Networks e-mail: fgont@si6networks.com PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492
- Re: Forwarding Packets With Link Local Destinatio… 神明達哉
- Forwarding Packets With Link Local Destination Ad… Ron Bonica
- RE: Forwarding Packets With Link Local Destinatio… Ron Bonica
- Re: Forwarding Packets With Link Local Destinatio… Fred Baker
- Re: Forwarding Packets With Link Local Destinatio… Alexandre Petrescu
- Re: Forwarding Packets With Link Local Destinatio… Fred Baker
- Re: Forwarding Packets With Link Local Destinatio… Alexandre Petrescu
- Re: Forwarding Packets With Link Local Destinatio… Toerless Eckert
- Re: Forwarding Packets With Link Local Destinatio… Brian E Carpenter
- Re: Forwarding Packets With Link Local Destinatio… Fernando Gont
- Re: Forwarding Packets With Link Local Destinatio… Gyan Mishra
- Re: Forwarding Packets With Link Local Destinatio… 神明達哉
- Re: Forwarding Packets With Link Local Destinatio… Alejandro Acosta
- Re: Forwarding Packets With Link Local Destinatio… 神明達哉
- Re: Forwarding Packets With Link Local Destinatio… Alexandre Petrescu
- Re: Forwarding Packets With Link Local Destinatio… Carsten Bormann
- Re: Forwarding Packets With Link Local Destinatio… Philip Homburg
- Re: Forwarding Packets With Link Local Destinatio… Markku Savela
- Re: Forwarding Packets With Link Local Destinatio… 神明達哉
- NATLL6 [was Re: Forwarding Packets With Link Loca… Brian E Carpenter
- Re: NATLL6 [was Re: Forwarding Packets With Link … Fernando Gont
- Re: NATLL6 [was Re: Forwarding Packets With Link … Brian E Carpenter
- Re: NATLL6 [was Re: Forwarding Packets With Link … Alejandro Acosta
- Re: NATLL6 [was Re: Forwarding Packets With Link … Alejandro Acosta