Re: Facebook & Traceroute

[Christopher Morrow <morrowc.lists () gmail com>]

On Wed, Mar 9, 2016 at 11:22 PM, Sam Norris <Sam () sandiegobroadband com> wrote:
> > maybe their loadbalancer is a little wonky? (I don't see this in
> > traceroutes from a few places, but I also don't end up at IAD for
> > 'www.facebook.com' traceroutes... here's my last 4 hops though to the
> > dest-ip you had:
> >
> > .13.28.75)  0.597 ms ae0.dr08.ash2.tfbnw.net (31.13.26.235)  0.576 ms
> >  8  * * *
> >  9  * * *
> > 10  * * *
> > 11  edge-star-mini-shv-07-ash4.facebook.com (66.220.156.68)  0.774 ms
> > 0.755 ms  0.701 ms
>
> This is probably because you are properly filtering your own prefixes from being sourced outside coming in?

unclear, that traceroute was from someplace I don't own the network for...
from another place I do though...

 5  ae0.dr07.ash2.tfbnw.net (31.13.26.233)  4 ms
ae0.dr05.ash3.tfbnw.net (31.13.29.21)  4 ms ae0.dr08.ash2.tfbnw.net
(31.13.26.235)  2 ms
 6  * * *
 7  * * *
 8  * * *
 9  edge-star-mini-shv-07-ash4.facebook.com (66.220.156.68)  3 ms  3 ms  2 ms

same-ish results, no spoofed bits.