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seanzhu868

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#133925 7-Nov-2013 23:13
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Hi everyone,
Just did a tracert on vodafone fibre home connection to google.com, here is the result:

C:\Users\demo>tracert google.com

Tracing route to google.com [203.109.178.84]
over a maximum of 30 hops:

1 1 ms <1 ms <1 ms OpenWrt.lan [192.168.1.1]
2 23 ms 3 ms 2 ms 118-92-27-254.dsl.dyn.ihug.co.nz [118.92.27.254]

3 3 ms 4 ms 2 ms 203-109-179-130.dsl.dyn.ihug.co.nz [203.109.179.
130]
4 4 ms 2 ms 2 ms 203-109-178-84.dsl.dyn.ihug.co.nz [203.109.178.8
4]

Trace complete.

Looks like vodafone has got a local google server, can someone confirm this?

I check the ssl certificate of the address https://203.109.178.84/  and it confirms the cert belong to google.com.  So I am just a few hop away from the server? It is just hard for me to believe. I know it is easy to add a middle man on the network and pretend as the real guy. For example, in my home network i have a google dns.
C:\Users\demo>tracert 8.8.8.8

Tracing route to google-public-dns-a.google.com [8.8.8.8]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms OpenWrt.lan [192.168.1.1]
2 1 ms <1 ms <1 ms MikroTik.lan [192.168.1.132]
3 1 ms 1 ms <1 ms google-public-dns-a.google.com [8.8.8.8]

Trace complete.
C:\Users\demo>ping 8.8.8.8

Pinging 8.8.8.8 with 32 bytes of data:
Reply from 8.8.8.8: bytes=32 time=1ms TTL=63
Reply from 8.8.8.8: bytes=32 time=1ms TTL=63
Reply from 8.8.8.8: bytes=32 time=1ms TTL=63

Ping statistics for 8.8.8.8:
Packets: Sent = 3, Received = 3, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 1ms, Average = 1ms
Control-C
^C

Is the vodafone google server suspicious or just I am too paranoid ...




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freitasm
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  #929181 7-Nov-2013 23:17
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Google is using the YouTube cache servers as a "last mile" server for its search operations.

Those YouTube servers were added to alleviate video traffic. They're operated, maintained by Google and the ISPs have to provide a specific amount of bandwidth.

It would be just logical that at some point Google would use that for something else. It was actually noted a few weeks back in some US-based tech sites.

They aren't dumb, those folks...




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seanzhu868

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  #929191 7-Nov-2013 23:28
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Thanks Admin, your info is just helpful!

michaelmurfy
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  #929208 8-Nov-2013 02:31
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Indeed - I've noticed a few changes as of late:


root@charmander# ping google.com
PING google.com (122.56.115.18) 56(84) bytes of data.
64 bytes from cache.googlevideo.com (122.56.115.18): icmp_req=1 ttl=58 time=18.0 ms
64 bytes from cache.googlevideo.com (122.56.115.18): icmp_req=2 ttl=58 time=19.1 ms
64 bytes from cache.googlevideo.com (122.56.115.18): icmp_req=3 ttl=58 time=19.4 ms
64 bytes from cache.googlevideo.com (122.56.115.18): icmp_req=4 ttl=58 time=18.1 ms
^C
--- google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms
rtt min/avg/max/mdev = 18.083/18.721/19.476/0.621 ms


% Information related to '122.56.0.0 - 122.63.255.255'

inetnum: 122.56.0.0 - 122.63.255.255
netname: NZTELECOM
descr: Telecom New Zealand Limited


It's quite good to see that the Google Caches are working to cache search results, I've noticed a huge improvement with YouTube + some Google pages on Telecom VDSL.




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sbiddle
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  #929216 8-Nov-2013 06:26
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The cache has been in place for a number of years now.

Google's model is very smart. If they had to provide their own servers and bandwidth their infrastructure costs would be massive.

Instead of doing this the cycinal people here would suggest that Google carefully manage their own resources to ensure users receive average or poor performance. This was the case on TelstraClear for example before they installed their own cache. Google then tell the ISP the "fix" is to buy a magic box from Google and provide Google with X Mbps of dedicated international bandwidth to provide the service. Things now work perfectly, and it hasn't cost Google anything.

freitasm
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  #929224 8-Nov-2013 07:58
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Just to clarify for above, the YouTube cache has been up for a few years but it seems recently Google started extending the use of those boxes to other services.

We knew it would happen, right?




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callumb
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  #937805 20-Nov-2013 11:40
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sbiddle: The cache has been in place for a number of years now.

Google's model is very smart. If they had to provide their own servers and bandwidth their infrastructure costs would be massive.

Instead of doing this the cycinal people here would suggest that Google carefully manage their own resources to ensure users receive average or poor performance. This was the case on TelstraClear for example before they installed their own cache. Google then tell the ISP the "fix" is to buy a magic box from Google and provide Google with X Mbps of dedicated international bandwidth to provide the service. Things now work perfectly, and it hasn't cost Google anything.


Ummm - except thats not how it works.

Google (like Akamai for eg) give the SP the caching hardware - there is no charge for it - all the SP has to do is provide rackspace, power and a pipe.

freitasm
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  #937809 20-Nov-2013 11:45
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Good correction there, but at the end of the day Google put a box inside an ISP's premisses, and get free bandwidth and power.

As noted, an easy and cheap way of creating a distribution network without having to go and put their own money into those resources.




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callumb
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  #937811 20-Nov-2013 11:47
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freitasm: Good correction there, but at the end of the day Google put a box inside an ISP's premisses, and get free bandwidth and power.

As noted, an easy and cheap way of creating a distribution network without having to go and put their own money into those resources.


Yup - just like Akamai do.

Google will also happily peer with you at any major IX that they also peer at (Equinix in SYD is a close example)

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