SSH disconnects when waking up from sleep

[larynx]

#1
I'm using El Capitan 10.11.1, everytime I wake up my computer from sleep my SSH connection disconnects with a message showing in the terminal

Write failed: Broken pipe

A message also appears in the System Log inside Console saying

11/6/15 4:02:36.559 PM configd[51]: network changed: v4(en0-:192.168.1.70) DNS- Proxy-
11/6/15 4:02:40.468 PM configd[51]: network changed: v4(en0+:192.168.1.70) DNS+ Proxy+ SMB

I searched for a solution and tried several things already like adding parameters in ssh_config, signing in to iCloud, settings a manual IP address, having the HDD not going to sleep in the Energy Saver settings and none worked. The only workaround I've found that works is settings the Computer Sleep settings to Never in the Energy Sleep settings but that doesn't seem like a good in the long run.

Does anyone have a solution for this issue?

Thanks

 

[XJ-linux]

When the OS is sleeping or hibernating, there are no keepalives aren't being sent. Even if is is set to "yes" in sshd_config, the OS is asleep and not sending them. That's why you get the broken pipe message. SMB isn't ssh, and in my estimation it's a red herring as far as ssh specifically goes. There is freeware for Linux/Unix that gets around this. You might try using "screen" from the command line in OS X if you just want to keep a remote ssh login going so you can pick up where you left off on the other computer and processes keep running on it when you lose a connection.

 

[larynx]

I use tmux for the SSH sessions but I guess I'll have to disable the computer sleep if there's no solution that doesn't involve re-connecting 10+ SSH sessions every time I wake up the computer

 

[MacInWin]

You can adjust the sleep settings to let the screen go blank, but keep the CPU awake. That's how I'm set up. The power usage for the heartbeat CPU activity is really minimal. You can even let the drives spin down (although I don't because I have an SSD) but that may make the machine to slow to respond to the network keepalives.

 

[XJ-linux]

I use tmux for the SSH sessions but I guess I'll have to disable the computer sleep if there's no solution that doesn't involve re-connecting 10+ SSH sessions every time I wake up the computer

You could try to use screen and do some testing. I haven't tried it to solve issues related to a system going to sleep, but it works fine on my AIX and Linux boxes for VPN sessions that die, bad Wifi and other such network interrupts. I'd assume that screen persists through a sleep cycle, though I don't know if it can continue to communicate or do whatever it needs to under the covers while in sleep mode on a Mac. It's free and included in OS X, so why not give it a shot?

Here's a quick general rundown...

http://www.ibm.com/developerworks/aix/library/au-gnu_screen/