From: Marvin Greenlee (marvingreenlee@yahoo.com)
Date: Sun May 21 2006 - 03:21:20 ART
.15 as a wildcard mask says that you don't care about
the last 4 bits. This means you are matching a group
of 16. The group of 16 starts at a multiple of 16,
which in this case is 16, so it would match 16 to 31.
.31 as a wildcard mask says that you don't care about
the last 5 bits. This means you are matching a group
of 32. The group of 32 starts at a multiple of 32,
which would be 0, and would cover 0 to 31 (excess
overlap)
--- Kashif Masood <kashifmasood27@hotmail.com> wrote:
> Hi Team:
>
> This may be a very basic question, but I am confused
> about which access-list
> is right
>
> We know that the private address range is 172.16.0.0
> 172.31.0.0 /12
>
> So if we have to filter RFC 1918 addresses, which
> access-list is right
>
> access-list 10 deny 172.16.0.0 0.15.255.255
>
> or
>
> access-list 10 deny 172.16.0.0 0.31.255.255
>
> Your input will be highly appreciated.
>
> Thanks
>
This archive was generated by hypermail 2.1.4 : Thu Jun 01 2006 - 06:33:22 ART