CLI IP range lookup tool
Rick Stevens
rstevens at internap.com
Fri Dec 21 21:03:56 UTC 2007
On Fri, 2007-12-21 at 09:14 -0700, Ashley M. Kirchner wrote:
> Is there a command line tool that can get me from '123.235.126.232'
> to '123.232.0.0/14' or even to '123.232.0.0:123.235.255.255'?
>
> Right now I'm manually using any of ripe.net, lacnic.net, or
> arin.net to go from the IP to the range '123.232.0.0:123.235.255.255'
> and then using 'netmask' to get to '123.232.0.0/14'. I'm wondering if
> there's a single tool to go from one to the other.
I'm not sure what you're trying to do. The normal way of doing it
is to use ifconfig:
# ifconfig eth0 123.235.126.232 netmask 255.252.0.0
That's a /14 netmask. ipcalc can show it to you:
# ipcalc -m 123.235.126.232/14
NETMASK=255.252.0.0
----------------------------------------------------------------------
- Rick Stevens, Principal Engineer rstevens at internap.com -
- CDN Systems, Internap, Inc. http://www.internap.com -
- -
- There are only 10 kinds of people in the world -- those who -
- understand binary and those who don't -
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