Request for comment -- BCP38

Seth Mattinen sethm at
Mon Sep 26 16:01:50 UTC 2016

On 9/26/16 07:47, Stephen Satchell wrote:
> On 09/26/2016 07:11 AM, Paul Ferguson wrote:
>> No -- BCP38 only prescribes filtering outbound to ensure that no
>> packets leave your network with IP source addresses which are not
>> from within your legitimate allocation.
> So, to beat that horse to a fare-thee-well, to be BCP38 compliant I
> need, on every interface sending packets out to the internet, to block
> any source address matching a subnet in the BOGON list OR not matching
> any of my routeable network subnets?  Plus add null-route entries for
> all the BOGONs in my routing table so I don't send a bad destination
> packet to my upstream?

I start with customer interfaces and configure them to only allow 
traffic with a source address in their assigned subnet.


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