Re: [BEHAVE] NAT Logging -- Port violation event for MAP-E or LW4over6 BR

On Apr 26, 2013, at 8:46 AM, Tom Taylor <tom.taylor.stds@gmail.com> wrote:

> Well, this comment has triggered an interesting discussion in Softwires, but now that I'm putting the final touches to a reissue of the SYSLOG NAT logging draft, I see it doesn't fit in very neatly there. The border router in these cases is not a NAT, so any discussion of logging probably belongs in a MAP-specific document. The CE is also responsible for checking, and the CE is a NAT, so it fits with the CE, but I'm not sure if it's worth standardizing.
> 
> I'll leave it out unless I get comments otherwise.

I believe the intent of generating such logging messages is diagnostics/troubleshooting, in order to detect mis-configured equipment.  The mis-configured equipment is the CPE router.  I don't recall, but doesn't the MAP router send back ICMP errors if the subscriber's CPE sends packets with the wrong port number?

-d

> On 25/04/2013 7:35 AM, Tom Taylor wrote:
>> The MAP-E and LW4over6 border routers are responsible for checking that
>> the ports assigned by the CE are within the set allocated to that CE. I
>> think we need a NAT logging event to report detection of an out-of-range
>> port.
>> 
>> Tom Taylor
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