nanog mailing list archives
Re: Netflix banning HE tunnels
From: Masataka Ohta <mohta () necom830 hpcl titech ac jp>
Date: Sat, 11 Jun 2016 09:33:40 +0900
Valdis.Kletnieks () vt edu wrote:
This requires each end system to restrict its use of ephemeral ports to a specified *different* subrange per system, because the number of end systems times their ephemeral port range can't exceed the number of front-end systems times their ephemeral port range.
Yes, and the resulting 48 bit address space should be large enough. Moreover, reverse NAT with dynamic port allocation is possible. Though, like dynamic address allocation, it is not very useful for servers, clients are fine. > You just lost the > only thing that makes CGNAT work - time multiplexing a given external > IP/port pair across several sequential users. That is an argument against static NAT with 32 bit address space without port translation/sharing.
Also, there's no existing mechanism for "if translation behavior of the NAT boxes are known to end systems".
UPnP offers such mechanisms though that of v1 is not very efficient. > So you're looking at
end systems having to change software *anyhow*.
Or live with conventional NAT, which is the current reality. The point is that migration can be done smoothly only by upgrading one end and that, after the upgrade, unupdated systems can continue to live with conventional NAT. Masataka Ohta
Current thread:
- Re: Netflix banning HE tunnels, (continued)
- Re: Netflix banning HE tunnels Owen DeLong (Jun 20)
- Re: Netflix banning HE tunnels Donn Lasher via NANOG (Jun 20)
- Re: Netflix banning HE tunnels Harald Koch (Jun 20)
- Re: Netflix banning HE tunnels Ricky Beam (Jun 09)
- Re: Netflix banning HE tunnels Karl Auer (Jun 09)
- Re: Netflix banning HE tunnels Randy Bush (Jun 09)
- Re: Netflix banning HE tunnels Karl Auer (Jun 09)
- Re: Netflix banning HE tunnels Ca By (Jun 09)
- Re: Netflix banning HE tunnels Masataka Ohta (Jun 10)
- Re: Netflix banning HE tunnels Valdis . Kletnieks (Jun 10)
- Re: Netflix banning HE tunnels Masataka Ohta (Jun 10)
- Re: Netflix banning HE tunnels Ricky Beam (Jun 10)
- Re: Netflix banning HE tunnels Randy Bush (Jun 10)
- Re: Netflix banning HE tunnels Mark Andrews (Jun 10)
- Re: Netflix banning HE tunnels Cryptographrix (Jun 10)
- Re: Netflix banning HE tunnels Cryptographrix (Jun 10)
- Re: Netflix banning HE tunnels Owen DeLong (Jun 12)
- Re: Netflix banning HE tunnels [really: IPv6 adoption] bzs (Jun 10)
- Re: Netflix banning HE tunnels Randy Bush (Jun 09)
- Re: Netflix banning HE tunnels Mark Andrews (Jun 09)
- Re: Netflix banning HE tunnels Mark Foster (Jun 09)