Upload bandwidth

[J1 Simón]

Hi,
When I download something from my FTP server (vsftpd v3.0.2) with
lftp v4.4.0 the upload bandwidth is high: 90-150 KB/s, is this normal?
Why lftp uses so much upload bandwidth?
Regards.

[Alexander V. Lukyanov]

Post by J1 Simón
When I download something from my FTP server (vsftpd v3.0.2)
with lftp v4.4.0 the upload bandwidth is high: 90-150 KB/s, is this
normal? Why lftp uses so much upload bandwidth?

Can you compare it to other ftp clients? What is the download rate?

Capture the traffic using tcpdump and see.

[J1 Simón]

Post by Alexander V. Lukyanov

Post by J1 Simón
When I download something from my FTP server (vsftpd v3.0.2)
with lftp v4.4.0 the upload bandwidth is high: 90-150 KB/s, is this
normal? Why lftp uses so much upload bandwidth?

Can you compare it to other ftp clients? What is the download rate?

I've tested with gFTP and same "problem". It isn't a lFTP issue.
The download rate is ~5,98MB/s

Post by Alexander V. Lukyanov
Capture the traffic using tcpdump and see.

Tcpdump shows a lot of information. I don't know what information is
relevant. But I see in the output that the packages sent from my PC to
the FTP server are of length 0:

IP 192.168.1.2.35827 > xxx.xxx.xxx.xxx.30901: Flags [.], ack
84326881, win 7455, options [nop,nop,TS val 818752 ecr 203099671],
length 0

Is this relevant?
Regards.

[Alexander V. Lukyanov]

Post by J1 Simón

Post by Alexander V. Lukyanov

Post by J1 Simón
When I download something from my FTP server (vsftpd v3.0.2)
with lftp v4.4.0 the upload bandwidth is high: 90-150 KB/s, is this
normal? Why lftp uses so much upload bandwidth?

Can you compare it to other ftp clients? What is the download rate?

I've tested with gFTP and same "problem". It isn't a lFTP issue.
The download rate is ~5,98MB/s

I think the upload traffic consists of just TCP acknowlegements.
It's quite normal.