Error "Software caused connection abort" that doesn't appear when using hotspot?

Question

I'm trying to connect to a server through FileZilla via SFTP, but I encounter a problem. Logs:

14:07:10    Status: Connecting to 178.62.11.187...
14:07:11    Trace:  CControlSocket::SendNextCommand()
14:07:11    Trace:  CSftpConnectOpData::Send() in state 0
14:07:11    Trace:  Going to execute C:\Program Files\FileZilla FTP Client\fzsftp.exe
14:07:11    Response:   fzSftp started, protocol_version=8
14:07:11    Trace:  CSftpConnectOpData::ParseResponse() in state 0
14:07:11    Trace:  CControlSocket::SendNextCommand()
14:07:11    Trace:  CSftpConnectOpData::Send() in state 3
14:07:11    Command:    open "hdodov@178.62.11.187" 22
14:07:11    Trace:  Connecting to 178.62.11.187 port 22
14:07:11    Trace:  We claim version: SSH-2.0-PuTTY_Local:_Jul_12_2017_08:57:39
14:07:16    Trace:  Network error: Software caused connection abort
14:07:16    Error:  Network error: Software caused connection abort
14:07:16    Trace:  CSftpControlSocket::OnTerminate without error
14:07:16    Trace:  CControlSocket::DoClose(66)
14:07:16    Trace:  CSftpControlSocket::ResetOperation(66)
14:07:16    Trace:  CControlSocket::ResetOperation(66)
14:07:16    Error:  Could not connect to server
14:07:16    Trace:  CFileZillaEnginePrivate::ResetOperation(66)

Here are some facts:

• The error occurs before a connection is established.
• I get the same result when connecting as anonymous.
• A friend can make a connection with the exact same host, username and password from another network.
• I can connect to other servers via SFTP.
• I can connect with the exact same configuration, but only while tethered to my Samsung Galaxy Young S6310 and using its Mobile Data.

• Setting up port forwarding with the following settings didn't fix it:

  | Service Port | IP Address    | Internal Port | Protocol   | Status  |  
  | ------------ | ------------- | ------------- | ---------- | ------- |  
  | 22           | 192.168.0.101 | 22            | TCP or UDP | Enabled |  
  

• Reinstalling FileZilla didn't work.

• Restarting my router didn't work.
• Restarting my computer didn't work.
• Disabling Firewall didn't work.
• Using another FTP Client (SmartFTP) didn't work. It throws the same error.

• Requests towards the server time out:

  Pinging findgreatquotes.com [178.62.11.187] with 32 bytes of data:
  Request timed out.
  Request timed out.
  Request timed out.
  Request timed out.
  
  Ping statistics for 178.62.11.187:
      Packets: Sent = 4, Received = 0, Lost = 4 (100% loss)
  

  Yet I can still open http://findgreatquotes.com/?!

Here are the results from tracert:

Tracing route to findgreatquotes.com [178.62.11.187]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  192.168.0.1
  2     1 ms     1 ms     1 ms  212-5-152-1.ip.btc-net.bg [212.5.152.1]
  3     1 ms     1 ms     1 ms  37.192.236.94-optic-com.eu [94.236.192.37]
  4     1 ms     1 ms     1 ms  212-39-69-153.ip.btc-net.bg [212.39.69.153]
  5    36 ms    36 ms    36 ms  ae-14.r24.frnkge08.de.bb.gin.ntt.net [129.250.6.242]
  6    58 ms    58 ms    58 ms  ae-5.r24.londen12.uk.bb.gin.ntt.net [129.250.3.12]
  7    28 ms    28 ms    28 ms  prag-bb1-link.telia.net [80.91.247.82]
  8   114 ms    41 ms    79 ms  hbg-bb1-link.telia.net [213.155.136.132]
  9    53 ms    55 ms    69 ms  ldn-bb3-link.telia.net [62.115.122.165]
 10    54 ms    53 ms    52 ms  ldn-b4-link.telia.net [62.115.136.43]
 11    57 ms    57 ms    47 ms  digitalocean-ic-306494-ldn-b3.c.telia.net [62.115.44.250]
 12     *        *        *     Request timed out.
 13     *        *        *     Request timed out.
 ..
 ..

Apparently, the problem lies somewhere in my router or my network settings. What could be the reason for such an error under the given circumstances?

Answer 1

Check whether the server hosting platform has banned your IP.