nanog mailing list archives
Re: Arguing against using public IP space
From: Robert Bonomi <bonomi () mail r-bonomi com>
Date: Sun, 13 Nov 2011 18:16:46 -0600 (CST)
From nanog-bounces+bonomi=mail.r-bonomi.com () nanog org Sun Nov 13 14:15:38 2011 From: William Herrin <bill () herrin us> Date: Sun, 13 Nov 2011 15:13:37 -0500 Subject: Re: Arguing against using public IP space To: nanog () nanog org On Sun, Nov 13, 2011 at 11:38 AM, Robert Bonomi <bonomi () mail r-bonomi com> wrote:On Sun, 13 Nov 2011 10:36:43 -0500, Jason Lewis <jlewis () packetnexus com> wrote;http://www.redtigersecurity.com/security-briefings/2011/9/16/scada-vendors-use-public-routable-ip-addresses-by-default.htmlAny article that claims a /12 is a 'class B', and a /16 is a 'Class C', is DEFINITELY 'flawed'.Hi Robert, Give the chart a second look. 192.168.0.0/16 (one of the three RFC1918 spaces) is, in fact, a /16 of IPv4 address space and it is, in fact, found in the old "class C" range. Ditto 172.16.0.0/12. If there's a nitpick, the author should have labeled the column something like "classful area" instead of "classful description."
In the 'classful' world, neither the /12 or the /16 spaces were referencble as a single object. Correct 'classful descriptions' would have been: "16 contiguous Class 'B's" "256 contiguous Class 'C's"
Current thread:
- Re: Arguing against using public IP space, (continued)
- Re: Arguing against using public IP space Owen DeLong (Nov 16)
- Re: Arguing against using public IP space Ray Soucy (Nov 16)
- Re: Arguing against using public IP space -Hammer- (Nov 16)
- Re: Arguing against using public IP space Jay Ashworth (Nov 15)
- Re: Arguing against using public IP space Owen DeLong (Nov 15)
- Re: Arguing against using public IP space Ray Soucy (Nov 15)
- Re: Arguing against using public IP space Phil Regnauld (Nov 13)
- Re: Arguing against using public IP space Jay Ashworth (Nov 13)
- Re: Arguing against using public IP space Jeff Kell (Nov 13)
- Re: Arguing against using public IP space Cameron Byrne (Nov 13)
- Re: Arguing against using public IP space Robert Bonomi (Nov 13)
- Re: Arguing against using public IP space Jay Ashworth (Nov 13)
- Re: Arguing against using public IP space Jeroen van Aart (Nov 14)
- Re: Arguing against using public IP space William Herrin (Nov 15)
- Re: Arguing against using public IP space Michael Sinatra (Nov 15)
- Re: Arguing against using public IP space Owen DeLong (Nov 15)
- Have they stopped teaching Defense in Depth? Jay Ashworth (Nov 15)
- Re: Have they stopped teaching Defense in Depth? Mark Andrews (Nov 15)
- Re: Have they stopped teaching Defense in Depth? William Herrin (Nov 15)
- Re: Have they stopped teaching Defense in Depth? Owen DeLong (Nov 16)
- RE: Have they stopped teaching Defense in Depth? Jamie Bowden (Nov 16)