On Thu, 2011-12-01 at 11:33 +0100, giggzounetSMTP wrote:
[...]
> On my LAN my routeur always forces the mtu of my laptops to 1492. I have
> a laptop with debian sid and an eeepc with debian stable lenny. On this
> LAN I have a NAS (readyNAS duo of Netgear). With my laptop with sid I
> don't have any problem at all to upload/download file from my NAS with
> ftp/cifs/NFS and with firestarter installed. But with my eeepc (with
> ethernet atl1c) I get one:
> - with firestarter installed
> - with an mtu set to 1492
> I can't download file from my NAS through ftp/cifs/NFS. But I can upload
> without problem.
>
> So I have a little bit researched on the problem:
> - with mtu of 1500 on my eeepc the problem disappears. even firestarter
> is installed.
> - the net.ipv4.tcp_timestamps value ist set to 0 by firestarter. When I
> force it to 1 it works out of the box even with an mtu of 1492.
Please provide packet captures for your download attempts. Use
'tcpdump -i eth0 -w eeepc.pcap' (as root) on the eeePC to create the
file 'eeepc.pcap' (and press ^C to stop). If you can install tcpdump on
the NAS, please run 'tcpdump -i eth0 -w nas.pcap' there at the same
time. You can use wireshark to review these files before sending them
to us.
Please also provide the firewall rules that firestarter generates
('iptables -vnL' will print these)
Ben.
--
Ben Hutchings
Absolutum obsoletum. (If it works, it's out of date.) - Stafford Beer
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