I am using Debian Sarge with Proftpd running on it downstairs (PC-A). Upstairs I have a Windooz PC with Filezilla (PC-B).

The problem is that when I download files from downstairs (from PC-A) to upstairs (to PC-B) the connection is very slow (approx. 60kB) while I use an internal network.

Downloading with B from the internet gives a speed of 500kB with cable.

ifconfig on PC-A gives:
eth0 Link encap:Ethernet HWaddr 00:40:CA:xx:yy:zz
inet addr:192.168.0.3 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9304963 errors:554468 dropped:0 overruns:0 frame:1075106
TX packets:11496371 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3089111465 (2.8 GiB) TX bytes:2863094896 (2.6 GiB)
Interrupt:11 Base address:0x1080

Downloading from the internet with PC-A also has a 500 kB speed.

The strange is that when I download multiple files simultaniously from PC-A to PC-B with Filezilla the speed of each file remains approx approx 60kB. The total bandwith in this situation can be up to 400kB.

Is this a hardware problem of PC-A looking at the errors or is it a software/settings problem?

I searched this forum and with google but I could not find a solution to it.

In proftpd.conf the following is switched off:
UseReverseDNS off
IdentLookups off

And I do not use the TransferRate directive in the conf files.

What could it be?

may be the problem is the sftp setting in filezilla....have you setted some encription??

Thanks loboautoma for your reply.

None. I happened also with ws_ftp on my Windooz. That is (ao., I prefer OSS!) why I switched to Filezilla. ws_ftp could handle only one connection, but Filezilla can do more then one connection at the same server. With this work-around I can get more data from my wife's PC downstairs to burn it overhere.

It seems to be a problem of the PC-A, Debian, the NIC, Proftpf or inetd.

I could not find a solution yet!