Re: [Proftpd-user] SFTP Client : SocketError: WSAECONNRESET An existing connection was forcibly closed by the remote host.

> We have a customer SFTP client that experiences this error  
> " SocketError: WSAECONNRESET An existing connection was forcibly closed 
> by the remote host."
> they are running the SFTP process inside MS SQL Server (SSIS).  I have 
> examined our server side log and do not see the server sending a 
> disconnect to the client.  So I am guessing that a router/firewall in 
> between is terminating the socket.

That's one possibility; another is that ProFTPD is treating the connection as idle (e.g. due to TimeoutIdle, TimeoutNoTransfer, etc) and is closing the connection abruptly, without sending a DISCONNECT message explicitly to the client.

In yours server logs, do you see these connections from the client?  Can you see what the last messages logged, for that session, are?

> They are actively downloading data but this error always pop up around 
> after 10 minutes of data transfer when a rekey is  happening  

Ah.  Some SFTP clients do not handle SSH rekeying as the mod_sftp module would like.  You might try explicitly configuring mod_sftp to not expect or require rekeying, using:

  <IfModule mod_sftp.c>
    ...

    SFTPRekey none
    ...
  </IfModule>

Cheers,
TJ

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