[Firestarter-user] Module atl1c + firestarter + mtu 1492 -> file transfert Problem with my NAS

[giggzounet <gig...@gm...>]

Hi,

Thx for your Programm. I'm using it on all my personal computers. it's
great!

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.

Could you please explain to me why the timestamps, tcp_scaling...are
disabled ? Is it safe for me to modify the sysctl_tuning file ?

Thx a lot,
Best regards,
GiGGz