[Network] 'mtr' tool : are these results abnormal ??

[Eamonn Sullivan]

On 9/5/06, Tony Arnold <tony.arnold at manchester.ac.uk> wrote:
> On Tue, 2006-09-05 at 11:05 +0100, Tony Arnold wrote:
> > On Tue, 2006-09-05 at 09:58 +0100, R Kimber wrote:
> >
> > > I tried it and got 30% - 50% loss even to my router !!!!
> > >
> > > There surely is some other explanation than an ISP-related one.
> >
> > I did this at our University and was getting 15% packet loss to one of
> > our local routers which I know is not overloaded.
> >
> > Our network manager ran mtr from his Mac and saw 0% loss, so I'm
> > wondering if there is a problem with the version of mtr on Ubuntu.
>
> I'm an idiot! My firewall was stopping some of the ICMP traffic coming
> back! Turn off the firewall and the figures look much more sensible.

I wonder if that's a clue to original issue. Is Monsieur Trouilliez or
the ISP running some firewall rules restricting ICMP traffic?

-Eamonn