Hello, I have an CentOS 5.5 64-Bit Server which provides an apache, mysql, postfix and so on. Now i tried to customize sshd-config /etc/ssh/sshd_config a little bit. I want to enable PermitTunnel. But after removing the trailing #, sshd does not start anymore. Error-Message: What can I do to fix this? I have a second webserver with the same os installed and there it works. sshd-Version (on both servers): Name : openssh-server Arch : x86_64 Version : 4.3p2 Release : 41.el5_5.1 Why does sshd not know this option?