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asn: map hosts to their corresponding ASN via HTTP/WHOIS
usage: asn.py [-h] [--bind-whois-v4 WHOIS_V4] [--bind-whois-v6 WHOIS_V6] [--bind-whois-port WHOIS_PORT]
[--bind-http-v4 HTTP_V4] [--bind-http-v6 HTTP_V6] [--bind-http-port HTTP_PORT] [--update] [--populate]
options:
-h, --help show this help message and exit
--bind-whois-v4 WHOIS_V4
WHOIS IPv4 host (default: 127.0.0.1)
--bind-whois-v6 WHOIS_V6
WHOIS IPv6 host (default: ::1)
--bind-whois-port WHOIS_PORT
WHOIS port (default: 4343)
--bind-http-v4 HTTP_V4
HTTP IPv4 host (default: 127.0.0.1)
--bind-http-v6 HTTP_V6
HTTP IPv6 host (default: ::1)
--bind-http-port HTTP_PORT
HTTP port (default: 8080)
--update Update dataset submodule and create/populate cache (default: False)
--populate Create and populate cache from current dataset (default: False)
INSTALL
$ git submodule init
$ git submodule update --recursive --remote
$ doas apk add py3-gitpython py3-waitress py3-flask (Alpine)
$ ./asn.py --populate
$ ./asn.py
optional: forward traffic destined for port 43 (WHOIS default) back to 4343
$ iptables -A PREROUTING -t nat -p tcp --dport 43 -j REDIRECT --to-ports 4343
USAGE
$ whois -h 127.0.0.1 1.1.1.1
IP Address | AS Number | Country | AS Name | Announcement
-----------+-----------+---------+---------------+-------------
1.1.1.1 | 13335 | AU | CLOUDFLARENET | 1.1.1.0/24
$ whois -h 127.0.0.1 jordan.im
IP Address | AS Number | Country | AS Name | Announcement
------------------+-----------+---------+-------------------+---------------
185.73.44.145 | 8943 | GB | Jump Networks Ltd | 185.73.44.0/22
2001:ba8:0:4031:: | 8943 | GB | Jump Networks Ltd | 2001:ba8::/32
$ curl 127.0.0.1:8080
{
"host": "8.8.8.8",
"hostname": "dns.google",
"org": "AS15169 GOOGLE",
"announcement": "8.8.8.0/24"
}
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