Re: Checking for Bogons

[Gisle Vanem <gisle.vanem@gmail.com>]

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Peter Müller wrote:

>> This flag 'LOC_NETWORK_FLAG_BOGON' does not exist (yet).
>> Would it be possible?
> 
> In theory, yes, but there is no need for another flag: If there is
> is no announcement for a network, it is considered to be a bogon.

What do you mean by "no announcement for a network" exactly?
(kind of an alien term to me).

> So, all you need to do is to check if loc_database_lookup() gives
> you an ASN for the queried IP address. :-)

So no ASN result, means a "Bogon"?
A command like:
   location.py list-bogons --family ipv4

returns for example '1.236.0.0/18'. And
'location.py lookup ::ffff:1.236.0.0' returns an ASN:
   Network                 : 1.236.0.0/24
   Country                 : Korea, Republic of
   Autonomous System       : AS38396 - Paju office of Education Gyeonggi Province

Doesn't look like a "Bogon" to me.

And trying a 'nmap -sA -p80 1.236.0.0/24', gave me 11 hosts up.
Seems no router cares about Bogons.

> Thanks, and best regards,
> Peter Müller

Thanks for your answer.


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