RT-N66U limit FTP upload/download speed

[Fire-Dragon-DoL]

I would like to know where is located the FTP configuration of the ftp server. I'm looking for it but actually if I change something in the UI, it's not reflected in NVRAM settings so I suppose that's not the right place.

Also, more important, are there any chance to limit bandwidth speed globally or on a per-user basis? No problem doing it by console, but I have yet to find settings

If I allow a friend to start downloading from my FTP I want to also avoid them to burn all my upload speed.

Thanks for any suggestion

P.S.
I use Merlin firmware

 

[Fire-Dragon-DoL]

I found the solution by myself.
First, vsftpd is FTP used by our router, placed in /usr/sbin/vsftpd, the conf file instead is located in /etc/vsftpd.conf

I noticed that by manually restarting the ftp config (in the web page) or change any settings, will overwrite the file, so the solution I found is "temporary" (until router restarted).

Kill all vsftpd instances, I noticed only -9 works as signal. (use kill -9 PID, found with ps)

Edit /etc/vsftpd.conf and add the following lines:
local_max_rate=204800 <-- bytes per second (0 unlimited)
anon_max_rate=204800 <-- bytes per second (0 unlimited)

So I'm limiting bandwidth at 200KB/sec both for anonymous and normal user. But wait, we need to restart the FTP server!

Just run vsftpd /etc/vsftpd.conf & <-- Yes with "and" symbol, and it's done, type "exit" and you have your ftp server with bandwidth limit.

Docs about config file:
https://security.appspot.com/vsftpd/vsftpd_conf.html