Why slow ftp

Hello, abrollsoftware.

Faced with this problem: when connecting to the ftp server "And" everything is fine, server "B" symptoms. The problem is this: for a very long time, the process of connection and directory listing, the files do not say anything. From another PC from the same network connection and transmission are fine.

Fairwood and antivirus no. Ftp mode passive (tried active — to no avail). Client Is File Zilla. TC — the story is the same. Via the command line — the same. OS — Windows Vista (work PC).

What else could be the problem?

PS: If the hub was wrong — do not kick much.
October 8th 19 at 01:40
4 answers
October 8th 19 at 01:42
To access the Internet via a proxy server? If Yes, then you first need to check whether the customer uses to connect the proxy server for server A and server B and configure the same. Also worth a look in the "Internet options" — "Connections" — "network setup" — "Advanced" is the checkbox "Use the same proxy server for all protocols". These settings catch most of the modern programs.
Proxies at all. - Keanu.Ritchie commented on October 8th 19 at 01:45
October 8th 19 at 01:44
Perhaps in the settings of the FTP server is not on resolving.
And it turns out that when the client connects, the server hangs until then yet will not allow the IP of the client.

But without logs, at least with the client to talk about something specific — not.
In the same FileZill'e you can open the connection window and to send a text(pre-putting, where the brakes).
>in the settings of the FTP server is not on resolving
The question arises: why with a nearby PC everything is fine? In this scenario, the computer would behave as well. - Keanu.Ritchie commented on October 8th 19 at 01:47
Then it is necessary to look at the logs from the client and see what stage brakes. - Keanu.Ritchie commented on October 8th 19 at 01:50
Status: specifies the IP address for sub.domain.com
Status: Connected with xx.xxx.xx.xx:21...
Status: Connection established, waiting for the invitation...
!!! brakes!!!
Response: 220 ProFTPD 1.3.3 a Server (Debian) []
Command: USER xxxxx
!!! brakes!!!
Response: 331 Password required for xxxxx
Command: PASS ********
!!! brakes!!!
Response: 230 User xxxxx logged in
Status: Connection established
Status: Getting list of directories...
Command: PWD
!!! brakes!!!
Response: 257 "/" is the current directory
Status: directory listing extracted - mallie56 commented on October 8th 19 at 01:53
Remove the dump and look in wireshark, it is able to build a diagram of the packet exchange, there will see who and at what gap slow. - Keanu.Ritchie commented on October 8th 19 at 01:56
October 8th 19 at 01:46
Try in the settings of the FTP server the ip address of the server itself...

The VDS had the same problem... add in the config the following:

UseIPv6 off
IdentLookups off
DefaultAddress ip address
DefaultServer on
UseReverseDNS off

Helped me...

To specify the ip address* - Keanu.Ritchie commented on October 8th 19 at 01:49
October 8th 19 at 01:48
We have with FTP is often slow due to the fact that the device can not agree with switch about the speed. Is exhibited auto-negotiation, on the other — 10Mbps full duplex — brakes terribly. Helps a clear indication of speed on all machines.

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