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Re: BCP38 tester?

daemon@ATHENA.MIT.EDU (Dobbins, Roland)
Mon Apr 1 04:34:22 2013

From: "Dobbins, Roland" <rdobbins@arbor.net>
To: NANOG list <nanog@nanog.org>
Date: Mon, 1 Apr 2013 08:34:04 +0000
In-Reply-To: <1364803360.2136.54.camel@karl>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org


On Apr 1, 2013, at 3:02 PM, Karl Auer wrote:

> Now I'm imagining a NAT process that translates only *destination* addres=
ses - hm, is there such a beast?

Sure - you just have rules in place which map the destination IPs of incomi=
ng packets, based upon classification criteria expressed in the NAT config,=
 to the destination address(es) of choice.

Those who ill-advisedly run servers behind NATs use this functionality.

You can also turn a NAT with this type of configuration 'upside-down', so t=
hat the 'public' side is nearest the traffic sources, if desired.

-----------------------------------------------------------------------
Roland Dobbins <rdobbins@arbor.net> // <http://www.arbornetworks.com>

	  Luck is the residue of opportunity and design.

		       -- John Milton



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