strange ping and traceroute results

[Shlomo Solomon]

On Sun, 20 Nov 2016 08:25:18 +0200
shimi <linux-il at shimi.net> wrote:

> I believe it's called a CDN and/or local compute clusters and the
> purpose of it is to give you a better user experience, which is a
> Good Thing (TM).
> 
snip ... snip ... snip
> 
> Why do you think it's a problem and are trying to avoid it?
> 

Thanks. I agree that this is "normally" a Good Thing (TM). So I guess I
have to explain my problem. For a course I'm doing, I had to write
traceroute in Python   -   re-invent the wheel :-) 

My program works, but I noticed it never reaches www.google.com so I
checked the "real" traceroute and found the same behaviour. 

It seems that neither my program nor the real traceroute handle this
properly - i.e. they never report that they've reached the final hop.
I've included traceroute www.godaddy.com and traceroute www.google.com
for comparison. You can see that traceroute www.google.com never
reaches the address it's trying to reach - 213.57.24.49




[solomon at shlomo1 ~]$ sudo traceroute www.godaddy.com
traceroute to www.godaddy.com (23.44.253.116), 30 hops max, 60 byte
packets 
1  router-1.solomon (10.0.0.138)  0.610 ms  0.979 ms  0.977 ms
2  core-213-57-3-7.ptr.hotnet.net.il (213.57.3.7)  15.370 ms  15.753
ms  16.148 ms 
3  ae7.101.hfa.mx-lns.con.hotnet.net.il (213.57.3.221) 16.544 ms
16.543 ms  16.553 ms 
4  core-213-57-3-217.ptr.hotnet.net.il (213.57.3.217)  17.345 ms
18.132 ms  18.524 ms 
5  207.232.21.146 (207.232.21.146)  20.941 ms  20.948 ms  20.944 ms 
6 core1-TenGigE0-4-0-1.hfa.nv.net.il (212.143.8.226)  21.311 ms
core1-0-5-0-21-edge1.hfa.nv.net.il (212.143.7.173)  22.651 ms  22.379 ms 
7  cdn-sw1-1-35-core1-2-5-hfa.hfa.nv.net.il (212.143.7.252)  21.129 ms
cdn-sw1-1-45-core1.hfa.nv.net.il (212.143.7.209)  18.333 ms cdn-sw1-1-43-core1.hfa.nv.net.il (212.143.7.201)  19.097 ms 
8 a23-44-253-116.deploy.static.akamaitechnologies.com (23.44.253.116)
18.299 ms  18.290 ms  18.703 ms



[solomon at shlomo1 ~]$ sudo traceroute www.google.com
traceroute to www.google.com (213.57.24.49), 30 hops max, 60 byte
packets 
1 router-1.solomon (10.0.0.138)  0.943 ms  0.937 ms  0.934 ms 
2 core-213-57-3-7.ptr.hotnet.net.il (213.57.3.7)  15.313 ms  15.720 ms
16.114 ms 
3  ae7.101.hfa.mx-lns.con.hotnet.net.il (213.57.3.221) 16.128 ms
16.526 ms  16.526 ms 
4  core-213-57-3-217.ptr.hotnet.net.il (213.57.3.217)  21.311 ms
21.692 ms  21.675 ms 
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[solomon at shlomo1 ~]$ 



-- 
Shlomo Solomon
http://the-solomons.net
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