Blocking a computer from a wireless router.

On a wireless network, is there a way to block a particular computer,
or all computes except for a particular computer, from accessing the
internet through your router? Password encryption doesn't work for my
purpose. I know that you can install packet sniffers on your local
computer that access resources requested and sent through your router,
so I figure there must be a way to block those requests. I can give
more information on request, but I figured I'd keep it as simple as
possible unless otherwise necessary.

Any suggestions are much appreciated, and Thanks in advance for any
help!
-Kelie

Kelie wrote:
> On a wireless network, is there a way to block a particular computer,
> or all computes except for a particular computer, from accessing the
> internet through your router? Password encryption doesn't work for my
> purpose. I know that you can install packet sniffers on your local
> computer that access resources requested and sent through your router,
> so I figure there must be a way to block those requests. I can give
> more information on request, but I figured I'd keep it as simple as
> possible unless otherwise necessary.
>
> Any suggestions are much appreciated, and Thanks in advance for any
> help!
> -Kelie
>

Many routers support that. RTFM.
--
Cheers, Bob

"Kelie" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) ups.com...
> On a wireless network, is there a way to block a particular computer,
> or all computes except for a particular computer, from accessing the
> internet through your router? Password encryption doesn't work for my
> purpose. I know that you can install packet sniffers on your local
> computer that access resources requested and sent through your router,
> so I figure there must be a way to block those requests. I can give
> more information on request, but I figured I'd keep it as simple as
> possible unless otherwise necessary.
>
> Any suggestions are much appreciated, and Thanks in advance for any
> help!
> -Kelie
>
Look through your router configuration for a setting named something like
'MAC address filter'. On mine, when enabled you can allow only listed
computers by MAC address, or disallow listed computers.
Of course, someone maybe able to 'clone' a MAC address - see the lengthy
discussion in alt.computer.security named
'change my IP address'.

Stuart

On Thu, 26 Oct 2006 18:09:17 GMT, "Stuart Miller"
<(E-Mail Removed)> wrote in <hR60h.192931$5R2.68080@pd7urf3no>:

>"Kelie" <(E-Mail Removed)> wrote in message
>news:(E-Mail Removed) oups.com...
>> On a wireless network, is there a way to block a particular computer,
>> or all computes except for a particular computer, from accessing the
>> internet through your router? Password encryption doesn't work for my
>> purpose. I know that you can install packet sniffers on your local
>> computer that access resources requested and sent through your router,
>> so I figure there must be a way to block those requests. I can give
>> more information on request, but I figured I'd keep it as simple as
>> possible unless otherwise necessary.
>>
>> Any suggestions are much appreciated, and Thanks in advance for any
>> help!
>>
>Look through your router configuration for a setting named something like
>'MAC address filter'. On mine, when enabled you can allow only listed
>computers by MAC address, or disallow listed computers.
>Of course, someone maybe able to 'clone' a MAC address - see the lengthy
>discussion in alt.computer.security named
>'change my IP address'.

MAC address filtering is a pointless waste of time. Only encryption
really matters, and only WPA with a strong passphrase is really secure.

--
Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>

Thanks to both of you for your help. That was just what I was looking
for!

Thanks again!,
-Jess
John Navas wrote:
> On Thu, 26 Oct 2006 18:09:17 GMT, "Stuart Miller"
> <(E-Mail Removed)> wrote in <hR60h.192931$5R2.68080@pd7urf3no>:
>
> >"Kelie" <(E-Mail Removed)> wrote in message
> >news:(E-Mail Removed) oups.com...
> >> On a wireless network, is there a way to block a particular computer,
> >> or all computes except for a particular computer, from accessing the
> >> internet through your router? Password encryption doesn't work for my
> >> purpose. I know that you can install packet sniffers on your local
> >> computer that access resources requested and sent through your router,
> >> so I figure there must be a way to block those requests. I can give
> >> more information on request, but I figured I'd keep it as simple as
> >> possible unless otherwise necessary.
> >>
> >> Any suggestions are much appreciated, and Thanks in advance for any
> >> help!
> >>
> >Look through your router configuration for a setting named something like
> >'MAC address filter'. On mine, when enabled you can allow only listed
> >computers by MAC address, or disallow listed computers.
> >Of course, someone maybe able to 'clone' a MAC address - see the lengthy
> >discussion in alt.computer.security named
> >'change my IP address'.
>
> MAC address filtering is a pointless waste of time. Only encryption
> really matters, and only WPA with a strong passphrase is really secure.
>
> --
> Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
> John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
> Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
> Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>

Thanks to both of you for your help. That was just what I was looking
for!

Thanks again!

Stuart Miller wrote:
> "Kelie" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed) ups.com...
> > On a wireless network, is there a way to block a particular computer,
> > or all computes except for a particular computer, from accessing the
> > internet through your router? Password encryption doesn't work for my
> > purpose. I know that you can install packet sniffers on your local
> > computer that access resources requested and sent through your router,
> > so I figure there must be a way to block those requests. I can give
> > more information on request, but I figured I'd keep it as simple as
> > possible unless otherwise necessary.
> >
> > Any suggestions are much appreciated, and Thanks in advance for any
> > help!
> > -Kelie
> >
> Look through your router configuration for a setting named something like
> 'MAC address filter'. On mine, when enabled you can allow only listed
> computers by MAC address, or disallow listed computers.
> Of course, someone maybe able to 'clone' a MAC address - see the lengthy
> discussion in alt.computer.security named
> 'change my IP address'.
>
> Stuart

"John Navas" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> On Thu, 26 Oct 2006 18:09:17 GMT, "Stuart Miller"
> <(E-Mail Removed)> wrote in <hR60h.192931$5R2.68080@pd7urf3no>:
>
> >"Kelie" <(E-Mail Removed)> wrote in message
> >news:(E-Mail Removed) oups.com...
> >> On a wireless network, is there a way to block a particular computer,
> >> or all computes except for a particular computer, from accessing the
> >> internet through your router? Password encryption doesn't work for my
> >> purpose. I know that you can install packet sniffers on your local
> >> computer that access resources requested and sent through your router,
> >> so I figure there must be a way to block those requests. I can give
> >> more information on request, but I figured I'd keep it as simple as
> >> possible unless otherwise necessary.
> >>
> >> Any suggestions are much appreciated, and Thanks in advance for any
> >> help!
> >>
> >Look through your router configuration for a setting named something like
> >'MAC address filter'. On mine, when enabled you can allow only listed
> >computers by MAC address, or disallow listed computers.
> >Of course, someone maybe able to 'clone' a MAC address - see the lengthy
> >discussion in alt.computer.security named
> >'change my IP address'.
>
> MAC address filtering is a pointless waste of time. Only encryption
> really matters, and only WPA with a strong passphrase is really secure.

Actually for what the OP wants to do, and as described by Stuart, MAC
filtering/blocking will achieve what the OP wants to do. He wants to block
non authorized users. If his system is small enough so the management will
not be so time consuming, he can configure his router to allow only certain
MAC addresses in.

8<-----------------------------------
>
> MAC address filtering is a pointless waste of time. Only encryption
> really matters, and only WPA with a strong passphrase is really secure.
>

Please help me here.
I don't have a great knowledge of how to break security systems.

Why is filtering a waste of time? It took me less than 10 minutes to set it
up here.
Why is it pointless?
Other than knowing which address to clone, how easy is it to break the
filtering algorithm in the router?
Brute force attack? 12 hex digits 2.8 * 10^^14 possibilities....
How can a total outsider find out which MAC addresses are inside?

> --
> Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
> John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
> Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
> Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>

Stuart

Stuart Miller <(E-Mail Removed)> wrote:

[John Navas wrote: ]

> > MAC address filtering is a pointless waste of time. Only encryption
> > really matters, and only WPA with a strong passphrase is really secure.
>
> Please help me here.
> I don't have a great knowledge of how to break security systems.
>
> Why is filtering a waste of time? It took me less than 10 minutes to set it
> up here.
> Why is it pointless?
> Other than knowing which address to clone, how easy is it to break the
> filtering algorithm in the router?
> Brute force attack? 12 hex digits 2.8 * 10^^14 possibilities....
> How can a total outsider find out which MAC addresses are inside?

The MAC addresses are sent in the clear.

On 26 Oct 2006 01:06:02 -0700, in alt.internet.wireless , "Kelie"
<(E-Mail Removed)> wrote:

>On a wireless network, is there a way to block a particular computer,
>or all computes except for a particular computer, from accessing the
>internet through your router?

Some routers let you do that, you'd have to read the fine manual.

Otherwise you could install proxy server software on a PC thats
always on, and point all the other PCs at this for their net access.
The proxy would block or allow users as you wanted to .

--
Mark McIntyre