I need to setup SSH to block all access to a certain IP on port 555. Only a small group of users should be allowed to tunnel to that IP. Currently I have the following stuff in my sshd_config
Match User bob PermitOpen 188.8.131.52:555 184.108.40.206:555
The question I have is, how do I deny all other users access to this tunnel? I dont see a denyopen, or restrictopen thing in sshd_config.