On Jun 12, 2013, at 3:47 PM, Benny Pedersen <[email protected]> wrote:
> so in other words:
>
> 127.0.2.0/24
> 127.0.0.0/8
>
> gives the same error in spf ?
No errors, these are properly formed.
I'll try my best to explain this, maybe something more concise will fallout
afterward:
127.0.2.0 as bits looks like:
01111111.00000000.00000010.00000000
The netmask "/24" is (255.255.255.0):
11111111.11111111.11111111.00000000
Notice how you can apply the netmask "covers" all of 127.0.2.0 with only zeroes
left over? Same with the 2nd example:
127.0.0.0:
11111111.00000000.00000000.00000000
netmask "/8" (255.0.0.0):
11111111.00000000.00000000.00000000
Now, check out 207.68.169.173/30:
207.68.169.173:
11001111.01000100.10101001.10101101 <<<<<<<<<<<< that last "1" is a
"host bit"
netmask "/30":
11111111.11111111.11111111.11111100
Network objects (207.68.169.173/30 in this case) should not contain host bits
(that last "1").
Malformed network objects: today's piece of esoterica!
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