It's a weird problem. I don't know why it occurs. I've tested with 2 FTP
servers: vsftpd and Pure-FTPd but it fails with both. It starts well but
after a few minutes the download speed drops sharply.
I've tested with another FTP servers near to my server but it fails with
another error:

$ lftp --norc ftp://ubuntu.mirrors.ovh.net -e "debug 5"
lftp ubuntu.mirrors.ovh.net:~> ls
---- Connecting to ubuntu.mirrors.ovh.net (2001:41d0:1:7c8b::1) port 21
**** connect(control_sock): Cannot assign requested address
ls: Cannot assign requested address

​$ lftp --norc ftp://ftp.crihan.fr/releases/ -e "debug 5"
cd: Cannot assign requested address
lftp ftp.crihan.fr:~> ls
---- Connecting to ftp.crihan.fr (2001:660:7401:211::36) port 21
**** connect(control_sock): Cannot assign requested address
ls: Cannot assign requested address
​
​IPv6? I have disabled IPv6 totally in my system
​/router​
:

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.internet.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
net.ipv6.conf.vten.disable_ipv6 = 1

I can connect from the browser, gFTP and GNU ftp.

My lftp config: http://pastebin.com/YqEJfLmR

The debug log: http://pastebin.com/KLH3k9FZ

I've seen the next line in debug: "AUTH TLS" and I have disabled SSL (I
don't need it) with: "set ftp:ssl-allow no;" but it still shows those
lines: http://pastebin.com/bmyLK0GY

​I have done many tests but I can not determine where the problem is. :-(

Any idea?
Regards.


2016-04-23 21:47 GMT+02:00 Alexander Lukyanov <lavv...@gmail.com>:

> Please turn on debug and see the ftp protocol details, it may shed some
> light.
>
> сб, 23 апр. 2016 г. в 17:28, Juan Simón <deced...@gmail.com>:
>
>> With lftp v4.6.5 is fails too. The curious thing is that it works well
>> for a while at start. I've tested with pget and same problem.
>> I have defined in config file:
>> ...
>> set pget:default-n 6;
>> set pget:min-chunk-size 4M;
>> set pget:save-status 2s;
>> ...
>>
>> But it shows only 2:
>> ...
>> $ jobs -vv
>>  [1] pget -c Munich (2005) (Ed.USA) [Remux AVC 1080p DTS-HD 5.1 Esp-Eng
>> Subs][Cachotronco][GrupoHDS].mkv  -- 13.1 KiB/s
>> ftp://monsi@sys/%2Ftorrent-descargas/pelis
>> `Munich (2005) (Ed.USA) [Remux AVC 1080p DTS-HD 5.1 Esp-Eng
>> Subs][Cachotronco][GrupoHDS].mkv', se obtuvieron 36110696993 de 43319521696
>> (83%) 13.1K/s falta:6d1h
>>   \chunk 14439840568-21659760849
>> `Munich (2005) (Ed.USA) [Remux AVC 1080p DTS-HD 5.1 Esp-Eng
>> Subs][Cachotronco][GrupoHDS].mkv' en 14450936147 (0%) 13.1K/s falta:6d1h
>> [Recibiendo datos]
>>
>> And this is the connections list with my server:
>> $ ss -ta | grep -i IP-server
>> ESTAB      0      0      192.168.1.2:55947
>>  IP-server:13439
>> ESTAB      0      0      192.168.1.2:59774
>>  IP-server:zoomcp
>> CLOSE-WAIT 0      0      192.168.1.2:58064                IP-server:ftp
>>
>> ESTAB      0      0      192.168.1.2:58072                IP-server:ftp
>>
>> ESTAB      4590008 0      192.168.1.2:45404
>>  IP-server:30142
>> ...
>>
>> Any help?
>> Thanks.
>>
>> 2016-04-23 15:54 GMT+02:00 Juan Simón <deced...@gmail.com>:
>>
>>> lftp v4.7.1
>>> Arch Linux 64 bits
>>>
>>> I have defined in my rc config file:
>>> ...
>>> set mirror:exclude-regex "^.+\.[pP][aA][rR][tT]$|^.+\.[uU][rR][lL]$";
>>> set mirror:no-empty-dirs yes;
>>> set mirror:order "/*";
>>> set mirror:parallel-directories yes;
>>> set mirror:parallel-transfer-count 2;
>>> set mirror:set-permissions no;
>>> set mirror:use-pget-n 6;
>>> ....
>>>
>>> But I have download a folder with mirror and only there are 2 threads:
>>>
>>> $ jobs -vvv
>>> ....
>>> [1] mirror STAR_WARS_EPISODE_IV_THE_FORCE_AWAKENS/  -- 42G/42G (99%)
>>> 27.0 KiB/s
>>>   \mirror `BDMV'  -- 42G/42G (99%) 27.0 KiB/s
>>>    \mirror `BDMV/STREAM'  -- 42G/42G (99%) 27.0 KiB/s
>>>     \transfer `BDMV/STREAM/00155.m2ts'
>>> `00155.m2ts', se obtuvieron 602416339 de 635123712 (94%) 27.0K/s
>>> falta:20m
>>>     \chunk 423415808-529269759
>>> `00155.m2ts' en 510521379 (82%) 19.5K/s falta:18m [Recibiendo datos]
>>>     \chunk 211707904-317561855
>>> `00155.m2ts' en 303602864 (86%) 7.5K/s falta:20m [Recibiendo datos]
>>>
>>> I've noticed this because the download speed is very slow. Generally the
>>> download speed is ~323mbps and today is ~300kbps. I have tested with iperf
>>> between my FTP server and the link is right.
>>> I'll test it with lftp v4.6.5.
>>>
>>> Regards.
>>>
>>
>> _______________________________________________
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>> lftp@uniyar.ac.ru
>> http://univ.uniyar.ac.ru/mailman/listinfo/lftp
>>
>
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