Re: TCP not working over ppp connection (WAS: 5th day using Linux...)


I wonder if your ISP has an MTU issue. That would explain
small packets getting through but not bigger ones. I don't
recall offhand how to troubleshoot that but a quick google
search should give it to you. You can probably test it
pretty quick by setting a lowish mtu with a paragraph in
/etc/network/interfaces as described in man 5 interfaces.

According to Tyson Varosyan,
> Ok, I have made outputs of the files that Tony and Andrew asked for. For
> some reason wget would not dump to a file, so I will copy the output into
> here.
>
> Also note: because my laptop does not have a floppy drive, I reloaded same
> version of Debian on my PC using a VIA motherboard with onboard PCMCIA
> controller. I am still having the same issue (TCP traffic not going over
> PPP).
>
> The output of the files is located at http://www.up-times.com/tcp/
>
> Tyson Varosyan
> Technical Manager, Uptime Technical Solutions LLC.
> tyson@xxxxxxxxxxxx
> www.up-times.com
> 206-715-TECH (8324)
>
> UpTime/OnTime/AnyTime
>
> -----Original Message-----
> From: Tony Godshall [mailto:togo@xxxxxx]
> Sent: Friday, January 06, 2006 4:45 PM
> To: tigran@xxxxxxxxxx
> Cc: Debian-User
> Subject: Re: TCP not working over ppp connection (WAS: 5th day using
> Linux...)
>
> According to Andrew Sackville-West,
> > On Fri, 6 Jan 2006 16:12:21 -0800
> > "Tyson Varosyan" <tigran@xxxxxxxxxx> wrote:
> >
> > > Yea, I am going to keep with it. This is just so damn frustrating! How
> would
> > > all TCP traffic just be blocked be default?! I do not know enough about
> the
> > > OS. I just got home and I am going to try some other flavors of Linux,
> > > ubuntu, mandrake, whatever I can find. I tried to install Debian with
> the
> > > 2.4 kernel. The only thing that was different is that my NIC did not get
> > > magically put to Eth1 - it remained at Eth0. But the PPP problem was
> still
> > > there.
> > >
> > > I have been administrating Corporate Windows Networks for 10+ years now
> and
> > > I have never seen anything like this with the core OS! Weird-ass driver
> > > issues, PNP (plug and pray) not working, devices getting *lost* or
> Windows
> > > patches breaking device drivers - sure - seen it all. But nothing like
> where
> > > a working device can connect, send ICMP traffic, route TCP traffic but
> not
> > > use TCP for itself.... Plain weird!
> >
> > as I said before, I know naught of these things here, so help a bit and
> maybe I can help more. What do you mean by use TCP for itself? if its
> routing tcp traffic, you should be done? I know, I know, wget doesn't work
> etc. ummm...
> >
> > just for shits and giggles, what's your /etc/resolv.conf say?
> >
> > cat /etc/resolv.conf
> >
> > and how about cat /etc/network/ifaces?
> >
> > shots in the dark.
> >
> > fwiw, once you get it done, it will "just work", really....
>
>
> Also, what about '/sbin/route -n'? Do you have more than
> one interface? What's the output of '/sbin/ifconfig'
>
>
> --
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>
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--

Best Regards,

Tony


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