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Note additional information on the SIPRNET page. Avriette 14:16, May 6, 2005 (UTC)
NIPRNet is also commonly referred to an NIPR (SIPRNet is also similarly shortened, as SIPR), but I haven't noticed any redirects for those terms. I think I'll add the appropriate redirects. ricojonah Jan 6, 2006
The article says NIPRNet is airgapped by design, but then it says that SIPRNet is tunneled over NIPRNet. That's clearly not an air gap. So which is it? This actually seems like a critical public policy point, because a non-airgapped classified network creates a serious security vulnerability. -- Beland (talk) 03:07, 28 February 2011 (UTC)
There is no air gap between SIPRNet and NIPRNet. It is possible to access SIPRNet via NIPRNet by tunneling, as described in the FCW article at http://fcw.com/articles/2002/12/08/marines-tunnel-to-siprnet.aspx. It also appears that there is no air gap between NIPRNet and the public Internet(s) (http://en.citizendium.org/wiki/NIPRNET certainly implies this), although it might once have been the case that SIPRNet and NIPRNet together were air-gapped from the public Internet(s), which would mean there was no way to access SIPRNet from a public Internet node - you would have to be physically connected to NIPRNet (or SIPRNet itself). The matter is confused by a lot of documents (like http://safeandvault.com/index.php/faq/115-gsa-containers/569-siprnet-network-procedure) that describe an "air gapped" connection between SIPRNet and NIPRNet when what is actually meant is that (hopefully strong) encryption and authorization is required to tunnel into SIPRNet from NIPRNet (there are also presumably additional restrictions on traffic between NIPRNet and the public Internet). @alex (talk) 18:57, 3 March 2011 (UTC)
Having never read formal documentation but doing things for the USG, no, you cannot access SIPRNet from NIPRNet, or vice versa. It is true that SIPRNet is transmitted across NIPRNet at many points, but it is encrypted, probably using TACLANEs. In terms of the way the USG does security and their definition of "air gap," I would say that, yes, there is an air gap. (See Air gap.) "Tunneling in" is not really a fair term as two separate terminals would be required—one unclassified, and one classified. You cannot "tunnel into" SIPRNet from NIPRNet. The Internet is accessible from NIPRNet proper, though that does not mean that they are one and the same. — Preceding unsigned comment added by 188.8.131.52 (talk) 06:17, 20 August 2012 (UTC)
The version of the acronym used by the U.S. Department of Defense (DoD) - owner of NIPERNET - is "NIPRNET". This can be seen in the Directive-Type Memorandum (DTM) 09-026 "Responsible and Effective Use of Internet-Based Capabilities" . For the sake of consistency and to avoid confusion, Wikipedia should adopt the acronym version used by DoD itself. Kolibrical (talk) 01:29, 13 April 2011 (UTC)