nanog mailing list archives
Re: How to find all of an ISP's ASNs
From: Curtis Doty <Curtis () greenkey net>
Date: Thu, 27 Oct 2016 14:38:30 -0700
On Tue, Oct 25, 2016 at 9:03 PM, Hank Nussbacher <hank () efes iucc ac il> wrote:
and if that doesn't work try: http://bgp.he.net/AS3356#_graph4 [replace the ASN with the ASN of your choice to see the interconnections.]
Doesn't always work--as it will only show upstream ASNs. For example, Comcast's backbone AS interconnects their regional ASNs. However, the regionals don't show up on http://bgp.he.net/AS7922#_graph4 so you'd need to find all of them first...with something like http://bgp.he.net/search?search[search]=Comcast and/or consult your favorite route server. Also Gary, keep in mind these aren't static. I.e. new AS are added/removed over time. And inferred policy (i.e. hub/spoke) could change too. But I'm still curious...how to you propose to filter by AS? And what if your neighbor (inside one of those permitted AS) is compromised? You've just re-exposed your IoT devices' soft white underbelly again. :-( ../C
Current thread:
- How to find all of an ISP's ASNs Gary Baribault (Oct 25)
- Re: How to find all of an ISP's ASNs colin johnston (Oct 25)
- RE: How to find all of an ISP's ASNs Luke Guillory (Oct 25)
- Re: How to find all of an ISP's ASNs Roland Dobbins (Oct 25)
- Re: How to find all of an ISP's ASNs Dhia Mahjoub (Oct 25)
- Re: How to find all of an ISP's ASNs Gary Baribault (Oct 25)
- Re: How to find all of an ISP's ASNs Yang Yu (Oct 25)
- Re: How to find all of an ISP's ASNs Hank Nussbacher (Oct 25)
- Re: How to find all of an ISP's ASNs Curtis Doty (Oct 27)
- Re: How to find all of an ISP's ASNs Hank Nussbacher (Oct 25)