Re: Netmask specification help

[Nick Holland <nick@holland-consulting.net>]

/16 is what you are after, I do believe...

     255.         255.          0.           0
= 1111 1111    1111 1111    0000 0000    0000 0000
   16 1's here, so that's /16.

Similarly,
     255.         255.         255.          0
= 1111 1111    1111 1111    1111 1111    0000 0000
   24 1's here, so that would be /24.

     255.         255.         255.         248
= 1111 1111    1111 1111    1111 1111    1111 1000
    29 1's, so that would be /29.  

     255.         255.         255.         255
= 1111 1111    1111 1111    1111 1111    1111 1111
    32 1s, so that would be /32.

Took me a while to figure out the notation myself.  Not sure why I
never saw it before, it is really easy, and a lot easier to visualize
quickly for me, at least, than the dotted quad notation. 8-)


vedu hariths wrote:
> 
> in IPFilter how do you specify the netmask for a class B subdomain
> i want to allow access to everthing in a 246.145.0.0 to 246.145.255.255
> range
> 
> thanks for help in advance
> 
> vh

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