[Gllug] traceroute funny

Richard Jones rich at annexia.org
Tue Sep 5 09:39:44 UTC 2006


On Tue, Sep 05, 2006 at 01:20:58AM +0100, Alain Williams wrote:
> I have done this from several different locations, each time the same thing happens, although the
> addresses are different.
> 
> What is happening ?
> 
> For those too idle to try it here is output from one machine, note how a line 5 there are multiple machines.
[...]
>  5  ae-0-56.bbr2.London1.Level3.net (4.68.116.162)  82.778 ms ae-0-54.bbr2.London1.Level3.net (4.68.116.98)  78.631 ms ae-0-52.bbr2.London1.Level3.net (4.68.116.34)  83.789 ms

Routes across the internet aren't and don't need to be stable.  Nor is
there anything to prevent an ISP from dispatching packets through
different routes or through different routers using any policy they
feel like ...

On a side note, tracerouting to the NSA might not be such a great
idea; you never know which standard tools might suddenly become
classified "dangerous hacking weapons".

Rich.

-- 
Richard Jones, CTO Merjis Ltd.
Merjis - web marketing and technology - http://merjis.com
Team Notepad - intranets and extranets for business - http://team-notepad.com
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