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   REPLYADDR jj@franjam.org.uk   
   REPLYTO 3:770/3.0 UUCP   
   MSGID:  7f1e18b6   
   REPLY:  b7853423   
   PID: SoupGate-Win32 v1.05   
   On 2024-01-12, Theo  wrote:   
   > bob prohaska  wrote:   
   >> I've got a Pi4 that's dropping individual ssh connections. One   
   >> particular connection out of a dozen or so drops, so it's   
   >> probably related to the server end, not the client.   
   >   
   ...snip...   
   >   
   > But usually a broken pipe means the TCP socket dropped for some reason,   
   > which is not the fault of SSH.  It can be due to aggressive timeouts on NAT   
   > routers - mobile networks are notorious for that.  Search for 'ssh   
   > keepalive' for details of how to make SSH send null packets back and forth   
   > every so often to prevent timeouts.   
      
   I have   
      
     ServerAliveInterval 30   
      
   in my ~/.ssh/config in the header so it is set for all my connections,   
   precisely because some of my connections were being dropped because of   
   inactivity causing an intermediate firewall/router to close down the   
   connection.   
      
   It's been that way for longer than I care to remember, so my memory is a   
   bit dim, but I know I played around with some other options that didn't   
   always seem to work.   
      
   >   
   > It could also be wifi related, if the wifi dropped out for some while then   
   > eventually the TCP connection would drop.   
   >   
   > If you affected by TCP drops, 'mosh' is a tool that runs on top of SSH that   
   > automatically reconnects and maintains the connection as it was before.  It   
   > also does things like caching keystrokes and replaying them when the   
   > connection comes back up.   
   >   
   > Theo   
      
   --- SoupGate-Win32 v1.05   
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