Show HN: Asroute – View unique networks traversed by traceroute
github.comTraceroute is fine for casual analysis but it is inaccurate and/or incomplete for anything serious because it misses routers that use load balancing on packet headers. For research purposes, it's better to use Paris Traceroute: https://paris-traceroute.net
> Why should you use Paris traceroute?
> Because traceroute fails in the presence of routers that employ load balancing on packet header fields. The failures lead to the discovery of inaccurate and incomplete paths, that may mislead operators during problem diagnosis and result in erroneous internet maps. Paris traceroute, by controling packet header contents, obtains a more precise picture of the actual routes that packets follow.
just stumbled across: https://www.dublin-traceroute.net
> Dublin Traceroute uses the techniques invented by the authors of Paris-traceroute to enumerate the paths of ECMP flow-based load balancing, but introduces a new technique for NAT detection.
There are also Python bindings [0] for dublin-traceroute which allows things like analysis with pandas or generating charts.
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[0]: https://github.com/insomniacslk/python-dublin-traceroute
This looks neat. Do you know what specifically it does differently than the traditional one? The blurb is vague and the "learn more" link is dead.
There is also the paper that introduced it at https://paris-traceroute.net/images/imc2006.pdf
Try the "about" link at the top.
Ah, wasn't showing up on mobile
Akamai uses something similar to perform trace routes in-band of HTTP TCP sessions to clients: https://datatracker.ietf.org/meeting/94/materials/slides-94-...
If anyone's curious how the tool is obtaining this information:
$ dig +short TXT 8.8.8.8.origin.asn.cymru.com
"15169 | 8.8.8.0/24 | US | arin | 1992-12-01"
$ dig +short TXT AS15169.asn.cymru.com
"15169 | US | arin | 2000-03-30 | GOOGLE, US"
Related: "Traceroute Lies! A Typical Misinterpretation Of Output" [0], previously discussed here on HN [1].
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[0]: https://movingpackets.net/2017/10/06/misinterpreting-tracero...
mtr -z? I mean, it is a good learning effort, but if someone doesn’t know about mtr, they should: https://bitwizard.nl/mtr/
To be fair the man page on my nearest ubuntu machine says
I assume from the context that it does the mtr equiv "traceroute -A" though-z, --aslookup MISSING-z only shows AS numbers, not names. The point of this is to quickly tell you companies and networks you recognize. Also, mtr requires sudo to run.
This just shows AS number rather than name, though, right?
while the as_number->as_name lookup is usefull i would have opted for adding this feature to one (or more) of the existing utilities (traceroute, mtr, paris-traceroute) instead of crafting yet another command.
FWIW:
$ traceroute -A ... $ mtr -z ...-A gets you the AS, my tool looks up the name. So you can see "Oh, it goes from Comcast, to Cogent to Google." cool. Rather than ASNs which you don't immediately recognize.