Does openssh support the function of automatically disconnecting when idle times out?

[lya1016]

Summary of the new feature / enhancement

Due to security requirements, I need the server and client to automatically disconnect after no data flows for a period of time. Does openssh support this function? Or what should I do to achieve this function？

Proposed technical implementation details (optional)

No response

[mgkuhn]

Automatic logout after a period of user inactivity is usually a shell function, e.g. use the variable TMOUT in bash, zsh, ksh, or tcsh to set such a timeout interval in seconds.

[mgkuhn]

There are also the ssh-config options ServerAliveInterval and ServerAliveCountMax, and the corresponding sshd-config options ClientAliveInterval and ClientAliveCountMax, but those are about automatic disconnects if the network connection times out, not about user inactivity.

[tgauth]

sshd_config supports configuring a timeout interval via the ChannelTimeout directive and the session option, added upstream in version 9.7 (Win32-OpenSSH version 9.8).