Re: deny a computer from opbtaining IP

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

"CAMC1" <webmaster@xxxxxxxxxxxx> wrote in message
news:u%231wTC40GHA.1300@xxxxxxxxxxxxxxxxxxxxxxx
I know the Mac Address, when I try to add reservation with an odd IP
address
I get error message "The specified DHCP client is not a reserved client"
whatever it means.

Sorry, I left out the details since I wasn't even sure
that you would use this suggestion (and you might
have known how to do it <grin>).

Create another SCOPE, use the range of "bad" addresses
you wish.

Add the reservation to this phony scope.

Create a Superscope*, and add both the real scope and the
phony scope to it.

*Superscope is misnamed (Microsoft didn't do it this is a
standard term): Superscope should be called a ScopeGroup.
It allows the DHCP server to understand that the SuperScopeGrouped
addresses can be given out through the same NIC.

In fact, I teach my students to always append the word "group"
onto this term so that they will forever remember the purpose of
Superscope(groups).

[Similarly, we do this with "Site Link Bridge" (groups) which are
really just Groups of SiteLinks that are transitively linked (by
the KCC automatically.)]


--
Herb Martin, MCSE, MVP
Accelerated MCSE
http://www.LearnQuick.Com
[phone number on web site]


MC

"Herb Martin" <news@xxxxxxxxxxxxxx> wrote in message
news:eprUrz10GHA.1588@xxxxxxxxxxxxxxxxxxxxxxx
"CAMC1" <webmaster@xxxxxxxxxxxx> wrote in message
news:O2LiR700GHA.3716@xxxxxxxxxxxxxxxxxxxxxxx
How can make my DHCP to deny IP address to a PC on my LAN?

You cannot do that exactly. DHCP is without authentication
or security features.

Do you know the MAC address of the offending PC? (If not,
how else would you identify this machine?)

You can use the MAC address to setup a RESERVERATION for
the machine which MAKES no sense....

Give it an address that is worthless, with a phony default gateway,
DNS, and WINS server etc.

--
Herb Martin, MCSE, MVP
Accelerated MCSE
http://www.LearnQuick.Com
[phone number on web site]






.

Relevant Pages

  • Re: deny a computer from opbtaining IP
    ... that DHCP would confuse and tought it would distribute to good computers. ... You must reserver ALL of the addresses of course. ... Add the reservation to this phony scope. ... Create a Superscope*, and add both the real scope and the ...
    (microsoft.public.win2000.active_directory)
  • Re: DHCP relay, superscope and laptops
    ... each of which has it's own subnet. ... The Switch then acts as a DHCP relay, ... relaying DHCP requests to a central DHCP server, ... What we did as a workaround, was that we created one superscope for each ...
    (microsoft.public.windows.server.networking)
  • Re: How to block a client from DHCP?
    ... Also in the DHCP reservation for this client give it a default gateway that ... Proxys or firewalls that can authenticate via User accounts ... > In our system all the "human" users are forced to go out via ISA Server ... > or by reservations in DHCP. ...
    (microsoft.public.windows.server.networking)
  • Re: set exception in dhcp scope
    ... The reservation should work fine, ... A single IP DHCP exclusion range is also possible, just a wee bit more work but not much. ... Les Connor [SBS MVP] wrote: ...
    (microsoft.public.windows.server.sbs)
  • Re: False IP conflict message...?
    ... If your Router can do IP reservation within the DHCP set it so that the Wired and Wireless computers that you have onsite would obtain always the same IP and would benefit from being on a DHCP server. ...
    (microsoft.public.windowsxp.network_web)