On Wednesday 28 July 2004 12:21, John Nichel wrote: >Hi, > > My binary skills are lacking, so does anyone know of a tool > (online or otherwise) to convert CDIR notation into the physical IP > range? eg convert 192.168.0.0/24 into 192.168.0.0 through > 192.168.0.255 (so I can see what the actual range is). TIA > >-- >John C. Nichel >ÜberGeek >KegWorks.com >716.856.9675 >john@xxxxxxxxxxxx This isn't terribly difficult John. What you seem not to have a grasp of is what the '/24' means. What it means is that the first 24 bits is fixed as stated, and in all cases that 24 bits is actually the hexidecimal version of the decimals you are looking at. In other words the first 3 (in this case 24/8=3) bytes are fixed, and this is the 192.168.0 portion of the address when stated in decimal. That 'mask' if you will, can be set to other values besides 24, like if you had only 16 address assignments availble from your ISP, then this masking value would be /28 for instance, with the 3rd 0 replaced by the lowest address of your assigned block. The last, "unmasked" bits are free to be any value. For a block of address that range from 192.168.0.240 to 192.168.0.255, it would be stated as 192.168.0.240/28 to make another example. Does this help? Anybody else with a better explanation, please feel free to jump right in and correct me if required. -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) 99.24% setiathome rank, not too shabby for a WV hillbilly Yahoo.com attorneys please note, additions to this message by Gene Heskett are: Copyright 2004 by Maurice Eugene Heskett, all rights reserved.
