[Dnsmasq-discuss] dnsmasq + nat(solved)

[richardvoigt at gmail.com]

On Mon, Jan 10, 2011 at 11:49 AM, andu novac <novac.andu at gmail.com> wrote:

> On Mon, Jan 10, 2011 at 7:30 PM, andu novac <novac.andu at gmail.com> wrote:
> > On Mon, Jan 10, 2011 at 7:21 PM, richardvoigt at gmail.com
> > <richardvoigt at gmail.com> wrote:
> >>
> >> On Mon, Jan 10, 2011 at 10:07 AM, andu novac <novac.andu at gmail.com>
> wrote:
> >>>
> >>> I'm trying to share an internet connection (pppoe) from one computer
> >>> to another via wifi (wlan0). I had this working fine before I upgraded
> >>> fron 32 to 64 bit Debian. The problem is that the computer on the wifi
> >>> network (the client) can reach some addresses (Google, Yahoo) but not
> >>> others where it hangs forever (Facebook). This setup I'm using is a
> >>> solution I found on the internet.
> >>>
> >>
> >> If the client can reach some addresses, it's not a dhcp issue, and
> probably
> >> not dns either, so dnsmasq is the last place I'd look.
> >> My crystal ball says you have an MTU problem.  pppoe, like all tunnels,
> >> often reduces the MTU for tunneled traffic.  If PTMU discovery isn't
> >> configured or working right on the client, there could be problems.
>  Just
> >> turning the interface MTU on the client down by 40 bytes or so may
> resolve
> >> the issue.
> >
> > I'd be glad to try that if you were kind enough to explain me how. So
> > this is the client computer you think?
> > Is this what I must do: ifconfig wlan0 mtu 1492 (or whatever will be)?
>
> Thanks, nice crystal ball, that did it!!
>

You're welcome.  However you would not say "nice crystal ball" if you saw
the scratch marks it leaves on the furniture ;)
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