Filezilla slower on Linux (compared to Windows)

[faster7on7windows]

Windows Filezilla 3.17.01
Filezilla ftp and sftp download at 12 megabytes (96 megabits) per second no matter how many files I download. If I download 1 file then it downloads at 12 megabytes. 10 files download at about 1.2 megabytes each. Filezilla version is 3.17.01 but I also had the same speed with previous versions last year.

Ubuntu 16.04 64 bit Filezilla 3.15
-Filezilla sftp and regular ftp are limited to 800KB/s per file. If I download 10 files at once then I can get 8MB/s total. If I download only 1 file then download speed is stuck at 800KB/s (100% of the time no matter what seedbox I use).

Similar posts of Filezilla being slower on Linux
https://forum.filezilla-project.org/...ic.php?t=32022
https://bbs.archlinux.org/viewtopic.php?id=198428

Solved by modifying sysctl with:
sudo sysctl -w net.ipv4.tcp_rmem='40960 873800 62914560'
sudo sysctl -w net.core.rmem_max=8388608

[jim_deadlock]

It's clearly an issue with Filezilla rather than Ubuntu so just use something else instead. Have you tried the 'Connect to Server' option within Nautilus (Files)? I find it much more convenient than a standalone FTP app. There is also the FireFTP Addon for Firefox which is pretty cool too.

[faster7on7windows]

It's clearly an issue with Filezilla rather than Ubuntu so just use something else instead. Have you tried the 'Connect to Server' option within Nautilus (Files)? I find it much more convenient than a standalone FTP app. There is also the FireFTP Addon for Firefox which is pretty cool too.

Thank you for the reply!

I posted on the Filezilla forum and the administrator said it is an issue with the Linux Kernel.
"There is a bug in the Linux kernel. For some reasons programs requesting a large TCP receive buffer actually get a smaller TCP window scale factor than programs not specifying a receive buffer at all."

Modifying sysctl fixed the problem:
sysctl -w net.ipv4.tcp_rmem='40960 873800 62914560'
sysctl -w net.core.rmem_max=8388608

Source:
https://forum.filezilla-project.org/...aa2f5da7454e14

[jim_deadlock]

That thread there is very interesting, thanks for linking it. I still think you should try Nautilus' built-in FTP tool, it's so nice dealing with remote files the same way as local ones.

[jim_deadlock]

FYI, the commands don't persist after reboot so you can add them at the end of /etc/sysctl.conf (note: remove '')

net.ipv4.tcp_rmem=40960 873800 62914560
net.core.rmem_max=25000000