If you mean block all even or odd numbers, then yes it can be done.  If you
mean prime numbers, then it cannot be done in a short/simple access-list.

Why? ..Because there isn't a short/simple binary bit pattern that
encompasses the prime numbers.  I.e.

1 0001
2 0010
3 0011
5 0101
7 0111
11 1011
13 1101

>From a bit-pattern view, It seems random, and not short/simple
access-listable.

Compare to even numbers
0 0000
2 0010
4 0100
6 0110
8 1000
10 1010
(Hint:  the Rightmost digit is always a 0)

HTH, 
Ejay


-----Original Message-----
From: Alejandro Pelaez [mailto:[EMAIL PROTECTED]]
Sent: Monday, July 30, 2001 2:58 AM
To: [EMAIL PROTECTED]
Subject: access list w/ prime numers [7:14117]


Hola All!

I want to set up an access list that do the following:
deny all packets from subnet 192.168.1.0 with last octect a prime numer.

Alejandro




Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=14230&t=14117
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]

Reply via email to