Return-Path: Received: from phenotype.laffeycomputer.com ([66.165.104.115] verified) by mail.stalker.com (CommuniGate Pro SMTP 4.2.3) with ESMTP id 30391947 for SIMS@mail.stalker.com; Wed, 29 Sep 2004 12:29:45 -0700 Received-SPF: pass receiver=mail.stalker.com; client-ip=66.165.104.115; envelope-from=joe@laffeycomputer.com Received: by phenotype.laffeycomputer.com (Postfix, from userid 1001) id 7016C40B41E; Wed, 29 Sep 2004 14:29:40 -0500 (CDT) Received: from localhost (localhost [127.0.0.1]) by phenotype.laffeycomputer.com (Postfix) with ESMTP id 6E00D40B41D for ; Wed, 29 Sep 2004 14:29:40 -0500 (CDT) Date: Wed, 29 Sep 2004 14:29:40 -0500 (CDT) From: Joe Laffey To: SIMS Discussions Subject: Re: (OT) Interpreting CIDR network info In-Reply-To: Message-ID: References: X-Fav-Unix: http://www.NetBSD.org/ MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII On Wed, 29 Sep 2004, Joe Laffey wrote: > On Wed, 29 Sep 2004, NetHead wrote: > > > I realize this is a bit off-topic, but it is relevant in that sometimes > > when trying to set up a blacklist for a range of IP's, my WHOIS reveals > > only a CIDR designation for the network I am suspicious of. > > > > For example, 218.175.0.0/16... how do I interpret that? I have read some > > of the RFC's on CIDR notation, but it still boggles my mind. Would that > > mean that they own the entire range from 218.175.0.0-218.175.254.254? > > > > Is there an easy way to read CIDR? or a tool that will do the conversion? > > > > Thanks for any and all help. > > Use the free program Whatmask. (I wrote it.) > > http://www.laffeycomputer.com/whatmask.html > > There is source doe and binaries for a few platforms, including Macs. Oops. "soucre doe" is some secret code for "source code". -- Joe Laffey | Visual Effects for Film and Video LAFFEY Computer Imaging | --------------------------------- St. Louis, MO | Show Reel at http://LAFFEY.tv/?s USA | --------------------------------- -------------------------------------------------------------------------- Mail here will be rejected --> "Sigfried Trap"