Solved Permitopen qualification is not successful.

[roywu]

Why did I use permitopen to qualify-L without success.

I modified the authorized_keys file, and other files default.

Is there a switch somewhere else?

 

[roywu]

I modified the DisableForwarding yes and AllowTcpForwarding no in / etc/ssh/sshd_config and restarted sshd.

But users can still SSH-L any port.
What is the reason for this? The configuration turned out to be invalid.

Maybe the above question has something to do with this phenomenon, do you agree?

 

[roywu]

I took another test:
In AllowTcpForwarding no, ssh-R can be restricted.
But ssh-L exemption, normal Forwarding