From: R. Adjakou/Home (radjakou@cfao.sn)
Date: Wed Mar 31 2004 - 21:39:40 GMT-3
Ok, Scott solution is right
----- Original Message -----
From: "Scott, Tyson C" <tyson.scott@hp.com>
To: "Scott, Tyson C" <tyson.scott@hp.com>; "Joseph D. Phillips"
<jphillips@ufcwdrugtrust.org>; "Group Study (E-mail)"
<ccielab@groupstudy.com>
Sent: Thursday, April 01, 2004 12:31 AM
Subject: RE: Access list
> Sorry let me write that better
>
> Access-list 1 deny x.x.1.2 0.0.2.24
> Access-list 1 permit any
>
> Regards,
>
> Tyson Scott
> Agilent Problem Management Team
> Managed Network Services
> Phone: 313-583-5812
> Pager: 877-997-0811
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Scott, Tyson C
> Sent: Wednesday, March 31, 2004 7:27 PM
> To: Joseph D. Phillips; Group Study (E-mail)
> Subject: RE: Access list
>
> Then here is your answer if only the specific networks.
>
> In binary it looks like:
>
> 1 2 00000001 00000010
> 1 10 00000001 00001010
> 1 18 00000001 00010010
> 1 26 00000001 00011010
> 3 2 00000011 00000010
> 3 10 00000011 00001010
> 3 18 00000011 00010010
> 3 26 00000011 00011010
>
> 1.2 2.24
>
> This will match and nothing more
>
> The logic is make the network statement the highest possible network
> statement. Then the and/or logic is the bits 8 and 16. As you can see
> the listed subnets use every combination of bits 8 and 16
>
> Read the document again and again. It took me a while to understand it.
>
> Regards,
>
> Tyson Scott
> Agilent Problem Management Team
> Managed Network Services
> Phone: 313-583-5812
> Pager: 877-997-0811
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Joseph D. Phillips
> Sent: Wednesday, March 31, 2004 7:08 PM
> To: Group Study (E-mail)
> Subject: Access list
>
> Yeah, I read that first before posting. It doesn't help because it only
> describes how to summarize two or more networks into one statement,
> irrespective of which networks might also be affected.
>
> I understand the concept of ANDing and XORing, but I don't know which
> lines to group together.
>
> -----Original Message-----
> From: Scott, Tyson C [mailto:tyson.scott@hp.com]
> Sent: Wednesday, March 31, 2004 16:05
> To: Joseph D. Phillips
> Subject: RE: Access list
>
>
> http://www.internetworkexpert.com/resources/01700370.htm
>
> Use this link. This is how I began to understand the concept
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Joseph D. Phillips
> Sent: Wednesday, March 31, 2004 6:52 PM
> To: Group Study (E-mail)
> Subject: Access list
>
> I've spent the entire afternoon on a single access list and still can't
> figure out the logic. I've looked up articles, and converted everything
> to binary and still can't make sense of this.
>
> Given the following networks (last two octets relevant), I need to block
> them all in as few lines as possible. Some of you people can do this in
> your heads. Simpletons like me, however, can't.
>
> These are the networks:
>
> 1.2
> 1.10
> 1.18
> 1.26
> 3.2
> 3.10
> 3.18
> 3.26
>
> In binary it looks like:
>
> 1 2 00000001 00000010
> 1 10 00000001 00001010
> 1 18 00000001 00010010
> 1 26 00000001 00011010
> 3 2 00000011 00000010
> 3 10 00000011 00001010
> 3 18 00000011 00010010
> 3 26 00000011 00011010
>
> What do I do after that? I know how to summarize them all into one
> statement, but I need specific deny statements that only apply to the
> networks to be blocked and to none else.
>
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>
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