conditional sentences

muzzol muzzol at gmail.com
Mon Sep 18 15:50:27 UTC 2006


> This is from the dhcp-options manual page.
>
>      option vendor-class-identifier string;
>
>        This option is used by some DHCP clients to  identify  the
>        vendor  type  and  possibly  the  configuration  of a DHCP
>        client.  The information is a string of bytes  whose  con-
>        tents  are specific to the vendor and are not specified in
>        a standard.   To see what vendor class identifier  clients
>        are  sending,  you  can  write  the following in your DHCP
>        server configuration file:
>
>        set vendor-string = option vendor-class-identifier;
>
>        This will result in all entries in the DHCP  server  lease
>        database   file   for   clients  that  sent  vendor-class-
>        identifier options having a set statement that looks some-
>        thing like this:
>
>        set vendor-string = "SUNW.Ultra-5_10";
>
> and you can use it like this. "MSFT 5.0" is returned by windows 2000
> and XP.
>
is there any list of vendor-string values anywhere?



> class "windows" {
>   match if option vendor-class-identifier = "MSFT 5.0";
> }
>
> You could do the same thing for linux, but there doesn't seem to be a
> default value set, although you could set it on each client.
>

for me is enough to disctint between windows and no-windows :)

> In appropriate pools either in the same or different subnets configure
> an allow or deny for the particular classes.
>
>   pool { # windows clients only
>     range ...
>     allow members of "windows";
>   }
>   pool { # everything except windows clients
>     range ...
>     deny members of "windows";
>   }
>

thats exactly what i want. thanks a lot


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