Hello Gisle,
thanks for your reply.
What do you mean by "no announcement for a network" exactly? (kind of an alien term to me).
I meant a BGP announcement, such as this one:
[root@maverick ~]# location lookup 193.0.6.139 193.0.6.139: Network : 193.0.0.0/21 Country : Netherlands Autonomous System : AS3333 - Reseaux IP Europeens Network Coordination Centre (RIPE NCC) <<<<<
So no ASN result, means a "Bogon"?
Yes.
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.
Indeed, looks like this does not work properly. Bug #12712 (https://bugzilla.ipfire.org/show_bug.cgi?id=12712) has been raised for this.
Sorry to disappoint.
Thanks, and best regards, Peter Müller