Strange FTP transmission problem

Hallo group.

I use FTP protocol for file transfer
between two places located in one city.
The sketch of situation is as follows:

SERVER
RedHat 9.0. ---DSL512---|--------|
vsftpd | |
|INTERNET|
|------------| | |
|FreeBSD 5.0.|---DSL512---|--------|
| (NAT) |
|------------|
|
|
|-----------|
| client |
|-----------|

( in practice "INTERNET" = one router
i my ISP )
DSL is assimaetrical link with 128kbit/s rate upstream )

I have problem with large file transmission.
When I start file download I get the transmision
rate about 10-15 kbyte/s but after while transmission
stops and I can't do anything with it.
I have no idea what can be wrong.
I found the FTP client which detects such situation,
renew connection and continue download.
However I still can't download files larger then
6MB. I use vsftpd v 1.1.3-8. as FTP server
with no transfer restriction applied into it.
It works as anonymous server for download only.

I also noticed that secure SSH file transfer
works fine and other stufs like http transfer
works without problems.

I have no idea what might be wrong.
I checked server log but I haven't found anything.
I would appreciate any help and any suggestion.

Best regards.
Adam.

(E-Mail Removed) (MaxGlc) wrote news:7043eeee.0408250312.58585295
@posting.google.com:
> I have problem with large file transmission.
> When I start file download I get the transmision
> rate about 10-15 kbyte/s but after while transmission
> stops and I can't do anything with it.

Maybe your are 'fulling' the server bandwidth (128Kb/s transmission)
causing retransmission and tcp/ip delay.

You may try :

- limit the transmission speed above the 128Kb/s, at the server or client
point (set it under 9KB/s to test).
- install a shapper tools as Wonder Shapper (manage packet priority).

Or test another ftp server (eg: proftpd), and/or another client (eg: wget).


Regards