https://community.hpe.com/t5/operating-system-linux/ssh2/m-p/3833218#M24404 If you're using RedHat's default SSH implementation (i.e. OpenSSH), the same sshd service can serve both SSH1 and SSH2 protocols. Check the "Protocol" directive in /etc/ssh/sshd_config to see which protocol version (or both) is enabled.<BR /><BR />If you need to change it, you must restart the sshd service (the command is "service sshd restart") so the change takes effect.<BR /><BR />If the server offers both protocol versions, in SSH protocol the client decides which version to use. What kind of SSH client are you using? Sat, 29 Jul 2006 13:30:06 GMT Matti_Kurkela 2006-07-29T13:30:06Z https://community.hpe.com/t5/operating-system-linux/ssh2/m-p/3833217#M24403 Red Hat Enterprise Linux 4.<BR /><BR />How can I enable the SSH2 service in my server? I only can connect through SSH1 right now. Sat, 29 Jul 2006 09:12:24 GMT https://community.hpe.com/t5/operating-system-linux/ssh2/m-p/3833217#M24403 Tonatiuh 2006-07-29T09:12:24Z https://community.hpe.com/t5/operating-system-linux/ssh2/m-p/3833218#M24404 If you're using RedHat's default SSH implementation (i.e. OpenSSH), the same sshd service can serve both SSH1 and SSH2 protocols. Check the "Protocol" directive in /etc/ssh/sshd_config to see which protocol version (or both) is enabled.<BR /><BR />If you need to change it, you must restart the sshd service (the command is "service sshd restart") so the change takes effect.<BR /><BR />If the server offers both protocol versions, in SSH protocol the client decides which version to use. What kind of SSH client are you using? Sat, 29 Jul 2006 13:30:06 GMT https://community.hpe.com/t5/operating-system-linux/ssh2/m-p/3833218#M24404 Matti_Kurkela 2006-07-29T13:30:06Z