[97827] in North American Network Operators' Group
Re: Yahoo outage summary
daemon@ATHENA.MIT.EDU (Sam Stickland)
Tue Jul 10 07:25:30 2007
Date: Tue, 10 Jul 2007 12:24:08 +0100
From: Sam Stickland <sam_mailinglists@spacething.org>
To: Andy Dills <andy@xecu.net>
Cc: 'Nanog' <nanog@nanog.org>
In-Reply-To: <20070709020255.W57409@shell.xecu.net>
Errors-To: owner-nanog@merit.edu
Andy Dills wrote:
> On Mon, 9 Jul 2007, Cat Okita wrote:
>
>
>> As far as "needing a verification system", is there something deeply
>> problematic about filtering your customers? It's a fine example of
>> thinking globally and acting locally.
>>
>
> That's what I'm curious about...this boils down to L3 not properly
> filtering Hanaro.
>
> Having recently turned up some L3 connectivity, I was happy to discover
> that they can use any of the routing registries as the source of their
> prefix filters. They told me the prefix filters are automatically
> constructed based on the RR of your choice...update the RR, and their
> filters will update that night, no need to bug them. Yay for that, wish
> everybody worked that way.
>
> But...why wasn't Hanaro being filtered? If the filters are being
> automatically generated, I would think they would just filter all of their
> peers regardless of number of prefixes etc.
>
Handily it's possible to query Level3's filters through a whois
interface, for example:
whois -h filtergen.level3.net RIPE::AS25577
For some reason this doesn't work:
whois -h filtergen.level3.net APNIC::AS9318
But this does, presumably this one is reading of an internal Level3 db:
whois -h filtergen.level3.net AS9318
List of prefixes returned is:
Prefix list for policy AS9318 =
LEVEL3::AS9318
61.98.32.0/19
61.98.64.0/20
61.98.96.0/20
124.111.0.0/16
210.93.131.0/24
210.93.132.0/22
211.33.96.0/20
211.49.96.0/20
211.49.144.0/20
211.49.192.0/19
211.49.240.0/20
211.59.160.0/19
211.59.208.0/20
211.59.224.0/20
211.110.160.0/19
211.110.224.0/20
211.186.0.0/19
211.186.32.0/20
211.186.64.0/19
211.186.96.0/20
211.186.144.0/20
211.186.160.0/19
211.243.144.0/20
211.243.224.0/19
211.244.0.0/20
211.244.32.0/19
211.244.64.0/20
211.244.176.0/20
211.245.48.0/20
218.49.114.0/24
218.234.87.0/24
Sam
