ssh -v ibook produces this output
SSH Version 1.2.27 [i686-unknown-linux], protocol version 1.5.
Standard version. Does not use RSAREF.
wiggles.squeegy.org: Reading configuration data /home/chiodi/.ssh/config
wiggles.squeegy.org: Applying options for *
wiggles.squeegy.org: ssh_connect: getuid 1002 geteuid 1002 anon 1
wiggles.squeegy.org: Connecting to cruel [192.168.1.7] port 22.
wiggles.squeegy.org: Connection established.
wiggles.squeegy.org: Remote protocol version 2.0, remote software version 2.0.13 (non-commercial)
wiggles.squeegy.org: Waiting for server public key.
Connection closed by remote host.
the server log produces this Nov 21 01:04:50 localhost sshd[497]: Listener created on port 22.
Nov 21 01:04:50 localhost sshd[498]: Daemon is running.
Nov 21 01:05:11 localhost sshd[498]: connection from "192.168.1.3"
Nov 21 01:05:11 localhost sshd[501]: Remote host disconnected: Illegal protocol version.
Nov 21 01:05:11 localhost sshd[501]: protocol version not supported: 'Illegal protocol version.'
RedHat 7.1 ssh version openssh-2.5.2p2-5