Telstra Hijack

Fri Oct 2 13:51:59 UTC 2020

Cross-post from Russ on AusNOG list.

Telstra blog post on issue is now live - http://exchange.telstra.com.au/an-update-on-our-september-30-bgp-issue/ 

Regards,

Mark

Sent from my iPhone

> On 30 Sep 2020, at 08:29, Mark Duffell <mark at duffell.net> wrote:
> 
> Hi Ross,
> 
> Just to confirm the AS1221 incident (INC000094009293) was resolved approx. 20:32 29/09/20 (UTC).
> 
> If anyone has further issues feel free to email me off-thread.
> 
> Regards,
> 
> -Mark
> Senior Network Engineer
> AS1221
> 
> 
> Sent from my iPhone
> 
>> On 30 Sep 2020, at 07:30, Ross Tajvar <ross at tajvar.io> wrote:
>> 
>> Bad prefixes are all gone. This looks resolved from my point of view.
>> 
>> On Tue, Sep 29, 2020 at 5:18 PM Ross Tajvar <ross at tajvar.io> wrote:
>>> I'm still seeing bad prefixes from Cogent, but our other upstreams (NTT, GTT, Telia) blocked them.
>>> 
>>> On Tue, Sep 29, 2020 at 5:09 PM Sadiq Saif <lists at sadiqsaif.com> wrote:
>>>> On Tue, 29 Sep 2020, at 16:36, Ross Tajvar wrote:
>>>> > I'm surprised no one else has mentioned this yet, but Telstra is 
>>>> > hijacking a lot of prefixes:
>>>> > 
>>>> > https://rpki.cloudflare.com/?view=bgp&prefix=&asn=1221&validState=Invalid 
>>>> > 
>>>> > Since we don't have RPKI filtering in our network (yet), we are 
>>>> > currently filtering everything with the path ".* 4637 1221$". 
>>>> > 
>>>> > This is of course taking a while...
>>>> 
>>>> My employer's prefixes were affected, I posted about it on the AusNOG list so I could get some assistance. It has cleared up now but it took about two hours or so.
>>>> 
>>>> I saw AS paths like this from HE's looking glass:
>>>> 6461x4, 4637x11, 1221
>>>> 
>>>> I would love to know what the root cause of the leak was.
>>>> 
>>>> -- 
>>>>   Sadiq Saif
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