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[Bug 3182] New: openssh-8.2 make ClientAliveCountMax=0 disable the connection
https://bugzilla.mindrot.org/show_bug.cgi?id=3182

Bug ID: 3182
Summary: openssh-8.2 make ClientAliveCountMax=0 disable the
connection
Product: Portable OpenSSH
Version: 8.2p1
Hardware: ARM64
OS: Linux
Status: NEW
Severity: security
Priority: P5
Component: sshd
Assignee: unassigned-bugs@mindrot.org
Reporter: kircherlike@outlook.com

The meaning of the ClientAliveCountMax=0 parameter modified in OpenSSH
8.2 is as follows:
https://anongit.mindrot.org/openssh.git/commit/?id=69334996ae203c51c70bf01d414c918a44618f8e

This modification indicates that the OpenSSH does not provide the
function of exiting the client due to timeout after no operation is
performed on the client for a long time. In most cases, a client that
does not perform any operation responds to the heartbeat packets sent
by the server.

The TMOUT parameter in /etc/profile can implement this function. This
parameter, however, is configurable on the client.

We hope that OpenSSH can re-provide a parameter on the server to make
the client that does not perform any operation exit due to timeout.

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