[clug] how to use traceroute

Kim Holburn kim.holburn at gmail.com
Tue Jun 24 19:01:17 MDT 2014

On the technical side I use lft (http://pwhois.org/lft/) where possible although some of that has been folded into more recent versions of traceroute.  netcat can be a handy diagnostic tool too.

On the other side.  I am with internode and for the last few weeks they have been having, what seems to me to be, intermittent routing issues.  They keep on trying to tell me it's a DNS issue and to flush my DNS cache but my home network has every possible OS with different DNS servers and every now and then sites like imgur.com or twimg.com or possibly any site using akamai or akamai like technology just never routes.  Since internode, iinet and grapevine are all the same now it might affect them all.

It has got to the point where I am seriously considering churning over to an ISP that works.



On 2014/Jun/25, at 9:31 AM, Eyal Lebedinsky wrote:

> I used it before to see what is going on with routing. However, there is something going
> on with iinet recently, and a download test from ftp.iinet.net.au ran at around 50k/s for
> a line sync of 6-7Mb/s.
> I did a 'traceroute ftp.iinet.net.au' and it went all the way to 30 hops. I added '-m 255'
> and it still went all the way. Looks like some kind of loop between (ftp.iinet...)
> and (no DNS). It is still doing this now.
> I find this unusual but maybe I do not understand how it works and why this is acceptable.
> Can anyone explain why this is so and is this normal?
> --
> Eyal Lebedinsky (eyal at eyal.emu.id.au)
> -- 
> linux mailing list
> linux at lists.samba.org
> https://lists.samba.org/mailman/listinfo/linux

Kim Holburn
IT Network & Security Consultant
T: +61 2 61402408  M: +61 404072753
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