Re: Fw: Problems with lost packets
----- Original Message -----
From: "nn" <nn@heberge.net>
To: "Alberto Rodríguez" <alberto@perezvera.com>
Sent: Wednesday, April 24, 2002 8:47 PM
Subject: Re: Fw: Problems with lost packets
> Quoting Alberto Rodríguez <alberto@perezvera.com>:
>
> OK, I understand.
> -Which ADSL driver do you use under linux ?
I havent't got any, my adsl machine is an external router adsl which is
conected by an ethernet nic to the computer.
It's a 3com 812.
> -do you have a noisy line ? Do you have ADSL phone filters for all your
phones
Well... not, on this adsl-line aren`t phones, and it have got a splitter
which slipt date and voice.
> or fax machine ?
Ok, yes, we have a fax machine on this line. Perhaps It's the problem, but
so I don't understand the reason because I can work from the firewall (which
is a potato-debian-linux machine with kernel 2.2.17), and I can't work from
the server properly (which is a potato-debian-linux with kernel 2.4.17 and
support for xfs filesystem).
both of them (Server and Firewall) and the router-adsl are all conected to a
switch.
Perhaps, the problem is between adsl conection and the kernel 2.4.17?????
In anyway, yesterday I conected the server to another machine ( on my
house ) who has a ppp conection by modem, and there, the server works
succesfully. In fact I have updated with apt-get the potato release of
debian ( about 33 megas) from this poor conection.
> -do you use IPTABLES as firewall under linux ? Do you have rules for ICMP
> traffic ?
No, I use Ipchains as firewall under linux only in the Firewall-machine. And
I'm sure that I haven't any rule for ICMP packets.
Do you think the problem is on the adsl-line?
Do you think is an incompatibiliy problem between kernel 2.4.17 and fax or
noises on the line?
>
>
>
> >
> > ----- Original Message -----
> > From: "nn" <nn@heberge.net>
> > To: "Alberto Rodríguez" <alberto@perezvera.com>
> > Sent: Wednesday, April 24, 2002 7:07 PM
> > Subject: Re: Fw: Problems with lost packets
> >
> >
> > > ok but your windows boxes MUST send correct sized packets WHEN these
> > packets
> > > are destination TO the internet. Example : connection to www.yahoo.com
> > from
> > > your windows machine :
> > Yes but the problem is not with a windows machine!
> > The problem is with a debian-linux machine....
> >
> > linux-server-machine --> Linux-firewall-machine--> internet -->
yahoo.com
> >
> > The problem is when I ping from linux-server-machine to Internet, not
when
> > I
> > ping from a windows to internet.
> >
> > Do you understand?
> >
> > >
> > > windows machine --> Linux Box --> internet -> Yahoo.com
> > >
> > > Your windows packets must be sized correctly.
> > >
> > > please read articles http://www.dslreports.com/
> > >
> > >
> > >
> > >
> > >
> > > Quoting Alberto Rodríguez <alberto@perezvera.com>:
> > >
> > > >
> > > > ----- Original Message -----
> > > > From: <ann@heberge.net>
> > > > To: "Alberto Rodríguez" <alberto@perezvera.com>
> > > > Cc: <debian-isp@lists.debian.org>
> > > > Sent: Wednesday, April 24, 2002 6:28 PM
> > > > Subject: Re: Fw: Problems with lost packets
> > > >
> > > >
> > > > > Try to set the MTU parameters correctly under your windows boxes.
> > > >
> > > > I can't understand, since the server is a linux-debian box not a
> > windows
> > > > box.
> > > >
> > > >
> > > >
> > > >
> > > > >
> > > > > stef
> > > > >
> > > > >
> > > > > Quoting Alberto Rodríguez <alberto@perezvera.com>:
> > > > >
> > > > > > Hello,
> > > > > >
> > > > > > I'm having problems with packets from internet.
> > > > > >
> > > > > > I have a little network. theare are a firewall which masquerade
all
> > > > > > paquets.
> > > > > > Now I have a server for web, email etc...
> > > > > >
> > > > > > The firewall have a adsl line. theare are about 10 windows
> > machines
> > > > which
> > > > > > use internet conection by the firewall.
> > > > > >
> > > > > > All these machines ( the windows ones) use full internet without
> > > > problems.
> > > > > > But the server have a big problem whit packets...
> > > > > >
> > > > > >
> > > > > > For instance, if I write ping www.gulic.org from the server, I
get
> > the
> > > > > > follow:
> > > > > >
> > > > > > ping www.gulic.org
> > > > > > PING www.gulic.org (193.145.135.17): 56 data bytes
> > > > > > 64 bytes from 193.145.135.17: icmp_seq=0 ttl=237 time=157.7 ms
> > > > > > 64 bytes from 193.145.135.17: icmp_seq=1 ttl=237 time=465.3 ms
> > > > > >
> > > > > >
> > > > > > and I only can receive one or two response to the ping, after
> > Ctrl+C
> > I
> > > > get
> > > > > > the follow:
> > > > > >
> > > > > > --- www.gulic.org ping statistics ---
> > > > > > 9 packets transmitted, 2 packets received, 77% packet loss
> > > > > > round-trip min/avg/max = 157.7/311.5/465.3 ms
> > > > > >
> > > > > > The problem is only if I ping to a exterior IP. If I ping to an
> > > > internal
> > > > > > one, the response of ping is normal:
> > > > > >
> > > > > > ping 10.0.0.64
> > > > > > PING 10.0.0.64 (10.0.0.64): 56 data bytes
> > > > > > 64 bytes from 10.0.0.64: icmp_seq=0 ttl=128 time=0.7 ms
> > > > > > 64 bytes from 10.0.0.64: icmp_seq=1 ttl=128 time=0.6 ms
> > > > > > 64 bytes from 10.0.0.64: icmp_seq=2 ttl=128 time=0.7 ms
> > > > > > 64 bytes from 10.0.0.64: icmp_seq=3 ttl=128 time=0.7 ms
> > > > > > 64 bytes from 10.0.0.64: icmp_seq=4 ttl=128 time=0.7 ms
> > > > > > 64 bytes from 10.0.0.64: icmp_seq=5 ttl=128 time=0.7 ms
> > > > > > 64 bytes from 10.0.0.64: icmp_seq=6 ttl=128 time=0.7 ms
> > > > > >
> > > > > > --- 10.0.0.64 ping statistics ---
> > > > > > 7 packets transmitted, 7 packets received, 0% packet loss
> > > > > > round-trip min/avg/max = 0.6/0.6/0.7 ms
> > > > > > servidor:~#
> > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > The server have a pci ethernet with the 8029 realtek chip.
> > > > > >
> > > > > > The server have a 2.4.18 kernel with xfs journaling support.
> > > > > >
> > > > > > The irq of the ethernet is 10 and is shared with the usb port.
> > > > > >
> > > > > >
> > > > > > Could anyone help me with this problem?
> > > > > >
> > > > > > Sorry for my bad English and thanks in advance.
> > > > > >
> > > > > >
> > > > > >
> > > > > >
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