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List:       openbsd-bugs
Subject:    ssh mux won't disconnect
From:       Ted Unangst <tedu () tedunangst ! com>
Date:       2013-04-12 20:23:03
Message-ID: 8de735f5003144e1a7fb42f2a54718f0 () tedunangst ! com
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I use this ssh config:

ControlPath /home/tedu/.ssh/ctrl-%r@%h:%p
ControlPersist 10
ControlMaster auto

It seems if my IP changes while a connection is active, the control
master never exits. Here's what happened:

1. login.
2. change IP.
3. notice connection is hung.
4. ~. to disconnect.
5. wait 10 seconds for master to die.
6. it doesn't.
7. wait more. finally kill it by hand.

There were no other clients connected. I expect the master to
disconnect (forcefully) after ten seconds. There are no more clients,
there's no need for a graceful session close or whatever it's waiting
on.

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