Falling for address collection (Was: Evil Bit and Spread Spectrum IP Addressing - NANOG Source Address Shaping)

Jason Hellenthal jhellenthal at dataix.net
Sun Mar 4 21:24:23 CST 2012


Why does everyone keep falling for the same address collector ? ;-)

-- LoL

On Sun, Mar 04, 2012 at 10:22:15AM -0600, Guru NANOG wrote:
> Common Misconception: One additional bit of IPv4 Addressing will solve
> world hunger
> 
> The Evil Bit (or spare unused bit) can be used to store (restore) one bit
> 
> The Left-Most bit of the 32-bit Source Address Field can be SET to
> Zero no matter what the original value. The Evil bit can be set IFF
> the Left-Most bit is **changed**.
> 
> Setting the Left-Most bit to zero **folds** this table in half.
> http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.txt
> 
> Setting the Left-Most bit to ONE would move return traffic to the
> upper half of the Spectrum which has vast quantities of unused /8s
> 
> Wide-spread consensus shows that TWO bits can work. Three bits folds
> the table to 1/8th.
> Governments want a 4-bit Return Prefix to their Super-Hubs for
> IPv6-like intercept.
> 
> The U.S.FCC is expected to issue the regulations on how Spread
> Spectrum Source Address Shaping will work in their licensed CPE
> wireless devices. There are 160-bits
> in the deprecated header so there are many ways to go.
> 
> One-Way Broadcast IP Addressing is now available. The Source Address
> Field is used
> for the second half of the 64-bit Destination Address. The DF (Did
> Flip) bit near the Evil
> Bit is used to note the two halves of the Destination Address have
> been *flipped*.
> NANOGers simply route 32 and then 32 after the flip based only on the
> Destination Field.
> There is no Source Address, only a channel (port).
> 
> Keywords: WRT DNSMASQ Tomato WIFI Linux CPE

-- 
;s =;



More information about the NANOG mailing list