Using x.x.x.0 and x.x.x.255 host addresses in supernets.

Tue Jan 8 14:00:45 UTC 2008

On Jan 8, 2008, at 8:45 AM, Joshman at joshman dot com wrote:

>  As a general rule, is it best practice to assign x.x.x.0 and x.x.x. 
> 255 as host addresses on /23 and larger?  I realize that technically  
> they are valid addresses, but does anyone assign a node or server  
> which is a member of a /22 with a x.x.x.0 and x.x.x.255?  Is it just  
> a manner of preference on whether or not to use them, or are there  
> functional reasons you shouldn't; either with rfc 1918 addresses or  
> public addresses.

I like to use them for critical service machines, since many versions  
of Windows will not send packets to them, so they are protected from  
most (but not all!) botnets.

-- 
TTFN,
patrick