Re: detecting network change.

[Michael <ml@hemathor.de>]

On Monday, January 12, 2026 12:07:59 PM CET, Tim Woodall wrote:
> Is there a portable (not specific to how networking is 
> configured) way of detecting a network change and forcing ssh to 
> close.
>
> At work I have an ubuntu laptop, when at my desk I'm using 
> wired connection, when I go to a meeting it switches to wifi.

if you are using NetworkManager, there are always 
/etc/NetworkManager/dispatcher.d/pre-up.d/ and 
/etc/NetworkManager/dispatcher.d/pre-down.d/

you could put a script in /etc/NetworkManager/dispatcher.d/pre-down.d/ that 
kills all ssh clients.

maybe something like:

 #!/bin/bash
 pkill ssh

ymmv

greetings...