Google served from non-google IPs?

Thu Mar 12 20:07:01 UTC 2015

Those IPs appear to be used by to Google cache servers at the QIX.  It's
common for CDNs to utilize provider space and not maintain their own
layer-3.  E.g. cache servers connected to switch, connected to provider,
without the requirement of a router.

/Steve

On Thu, Mar 12, 2015 at 3:58 PM, Jason Lixfeld <jason at lixfeld.ca> wrote:

> So today, I saw this:
>
> BlackBox:~ jlixfeld$ host google.ca 8.8.8.8
> Using domain server:
> Name: 8.8.8.8
> Address: 8.8.8.8#53
> Aliases:
>
> google.ca has address 206.126.112.166
> google.ca has address 206.126.112.177
> google.ca has address 206.126.112.172
> google.ca has address 206.126.112.187
> google.ca has address 206.126.112.151
> google.ca has address 206.126.112.158
> google.ca has address 206.126.112.157
> google.ca has address 206.126.112.173
> google.ca has address 206.126.112.181
> google.ca has address 206.126.112.155
> google.ca has address 206.126.112.147
> google.ca has address 206.126.112.185
> google.ca has address 206.126.112.143
> google.ca has address 206.126.112.170
> google.ca has address 206.126.112.162
> google.ca has IPv6 address 2607:f8b0:4006:808::100f
> google.ca mail is handled by 50 alt4.aspmx.l.google.com.
> google.ca mail is handled by 30 alt2.aspmx.l.google.com.
> google.ca mail is handled by 20 alt1.aspmx.l.google.com.
> google.ca mail is handled by 10 aspmx.l.google.com.
> google.ca mail is handled by 40 alt3.aspmx.l.google.com.
> BlackBox:~ jlixfeld$
>
> That is not Google IPv4 address space, and those IPv4 IPs are not being
> announced by 15169.
>
> Am I dumb in thinking that this is weird or is this sort of thing
> commonplace?

-- 
Steven J. Schecter
(m) 917.676.1646