nanog mailing list archives
Re: Arguing against using public IP space
From: Jay Ashworth <jra () baylink com>
Date: Sun, 13 Nov 2011 18:29:39 -0500 (EST)
----- Original Message -----
From: "Roland Dobbins" <rdobbins () arbor net>
The real issue is interconnecting SCADA systems to publicly-routed networks, not the choice of potentially routable space vs. RFC1918 space for SCADA networks, per se. If I've an RFC1918-addressed SCADA network which is interconnected to a publicly-routed- and -accessible network, then an attacker can work to compromise a host on the publicly-accessible network and then jump from there to the RFC1918 SCADA network.
SCADA networks should be hard air-gapped from any other network. In case you're in charge of one, and you didn't hear that, let me say it again: *SCADA networks should he hard air-gapped from any other network.* If you're in administrative control of one, and it's attacked because you didn't follow this rule, and someone dies because of it, I heartily, and perfectly seriously, encourage that you be charged with homicide. We do it with Professional Engineers; I see no reason we shouldn't expect the same level of responsibility from other types. Cheers, -- jra -- Jay R. Ashworth Baylink jra () baylink com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com 2000 Land Rover DII St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274
Current thread:
- RE: Have they stopped teaching Defense in Depth?, (continued)
- RE: Have they stopped teaching Defense in Depth? Jamie Bowden (Nov 16)
- Re: Have they stopped teaching Defense in Depth? Owen DeLong (Nov 16)
- Re: Have they stopped teaching Defense in Depth? William Herrin (Nov 16)
- Re: Have they stopped teaching Defense in Depth? Owen DeLong (Nov 16)
- Re: Have they stopped teaching Defense in Depth? Jimmy Hess (Nov 16)
- Re: Have they stopped teaching Defense in Depth? Jay Ashworth (Nov 16)
- RE: Have they stopped teaching Defense in Depth? Leigh Porter (Nov 16)
- Re: Have they stopped teaching Defense in Depth? Valdis . Kletnieks (Nov 16)
- RE: Have they stopped teaching Defense in Depth? Jamie Bowden (Nov 16)
- Re: Arguing against using public IP space Jay Ashworth (Nov 13)
- Re: Arguing against using public IP space Dobbins, Roland (Nov 13)
- Re: Arguing against using public IP space Brett Frankenberger (Nov 13)
- Re: Arguing against using public IP space Jay Ashworth (Nov 13)
- Re: Arguing against using public IP space Joe Greco (Nov 13)
- Re: Arguing against using public IP space Joel jaeggli (Nov 13)
- Re: Arguing against using public IP space Joe Greco (Nov 14)
- Re: Arguing against using public IP space Dobbins, Roland (Nov 13)
- Re: Arguing against using public IP space Joe Greco (Nov 14)