Here's the easy way. If you want to allow/block an entire subnet such as:
192.168.1.240 255.255.255.240 then your mask will be determined as follows
255.255.255.255
- 255.255.255.240
------------------------
0. 0. 0. 15
Its that easy.
JOE
CCNP, CCDP, and a few other things...
CCIE Lab - May 27/28
"Justin Marcus" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> hey it would be
> access-list 101 deny ip 192.189.243.64 0.0.0.63
>
>
> On Tue, 23 May 2000 [EMAIL PROTECTED] wrote:
>
> > I have used uncommon subnets vey little, and have forgotten part of my
> > mask stuff.
> >
> >
> > If I have this:
> >
> >
> > Access-lst 101 deny ip 192.189.243.64 255.255.255.192 any
> >
> > I know that the mask is not done the proper way. Can somegive me a
> > refresher on how to get the proper inverse mask for this access list?
> >
> >
> > Thanks
> >
> >
> >
> > /**************************************************************/
> > Donald Neisler
> > MCSE, CCNA, ACRC
> >
> > Network Specialists
> >
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