Le 28 oct. 2010 à 20:51, Chris Engel a écrit :

> That's exactly the type of scenario most Enterprises DON'T want to see work. 
> In cases of INBOUND connections, Enterprises generally WANT them to fail 
> unless the Enterprise has taken explicit measures to make them work.

Can't FW's  do that without needing address translation;?

> Furthermore, more often then not, when the Enterprise does want them to work, 
> it's going to FORCE said apps to go through some well known, centrally 
> managed point (i.e. some sort of Proxy/ALG) where it can be 
> monitored/audited/controlled and perhaps some policies regarding how it is 
> being used can be enforced.

If some proxy is traversed, what is the use of NAT66?


> 
> In other words, NAT generally isn't breaking anything that the Enterprise 
> doesn't want broken anyway.... and *may* actually be helping to break certain 
> things that would be somewhat more difficult to break without it.

Could you be more precise (asterisks added)?

> This is an area where Enterprises and Transit Providers seem to be entirely 
> different animals with different priorities.

Agreed, but questions about enterprise configurations that really need NAT66 
are still legitimate.
 
> Let's look at something like VOIP. From the individual consumers point of 
> view the idea that you can sit down at any internet connection anywhere in 
> the world and have a free/low cost voice conversation with anyone at an 
> internet connection anywhere else in the world is awesomely cool. However 
> from the perspective of many Enterprises this is very problematic for 
> business related calls. Enterprises may require specific things happen in 
> relation to business calls (such as monitoring, auditing, recording) that are 
> infinitely harder to achieve unless such calls are FORCED to go through a 
> central service.
> 
> So for example, when customer calls up the company and says... "One of your 
> Operators called me up at 2 AM and promised me X".  The response from IT 
> isn't....
> 
> "OK we'll try to search through every single workstation in the company, 
> including those which are out for repairs, and see If anyone was running 
> Skype at 2 AM....and Oh god, I hope they were following policy and recording 
> the call if they did....and Oh god, I hope someone didn't screw up and let a 
> personal device plug into our network jacks."
> 
> The response is....
> 
> "We have a record of every call originating from our network. Searching the 
> call log db we can see that a call was placed to this number at 5:02 PM from 
> Operator #231 at workstation 211 in the Houston Branch. Here is the 
> voice-recording of the content of that call. Shall I play it for you so that 
> you can hear exactly what was said?"

That's clear.
But WHY would this require address translation?

Regards,
RD


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