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I'm running Ubuntu 11.04 on a machine in my house that I use for web development. I connect to it using Filezilla SFTP to transfer files from my office. When I connect and only browse, the connection will remain active for extended periods of time (desired result). However, when I transfer a file, after the queue is complete, I get disconnected after ~10 seconds. What could be causing this?

I've tried TCPKeepAlive yes / no, ClientAliveInterval, neither seem to help.

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Any relevant information in server logs? –  Khaled Apr 17 '12 at 13:45
    
I'd bet £1 it's related to the firewall you're traversing at work (assuming when you say 'your office' there's a corporate firewall protecting you from the evils of the internet) - but I don't know how you could prove / solve the issue if that's it. Does it happen from non-office locations in the same way? –  EightBitTony Apr 17 '12 at 13:55
    
what about scp? if you scp a file does the same thing happen? if not, then filezilla is sending something to close the connection after the transfer. –  johnshen64 Apr 17 '12 at 16:40
    
Can you define "transfer a file"? –  Patrick Apr 17 '12 at 21:59
    
scp doesn't keep connection open anyway. –  sendmoreinfo Oct 27 '12 at 7:56

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