此版本补充实验沙盒，在预认证阶段和SHA2基于HMAC的模式，为SSH传输的面向网络的代码。 sshd的特权分离过程，现在发送日志，通过管道，消除了需要的/ var /空的/ dev /日志。有更多的错误修正和变化。
Stable, Minor feature enhancements, Minor bugfixes
This release added experimental sandboxing of network-facing code during the pre-authentication phase and SHA2-based HMAC modes for the SSH transport. sshd now sends logs from the privilege-separated process via a pipe, eliminating the need for /var/empty/dev/log. There were many more bugfixes and changes.
This is a major feature and bugfix release. Major changes include disabling SSH protocol 1 by default, removal of legacy OpenSC/libsectok smartcard support, addition of PKCS#11 support, introduction of a new certificate authentication method for users and hosts, revised session multiplexing code, many improvements to sftp from the Google Summer of Code 2009, and lots of bugfixes.
Execution of ~/.ssh/rc was disabled for sessions
where a command has been forced by the sshd_config
ForceCommand directive (unsafe default behavior).
Chroot support for sshd was added. Internal
sftp-server support was added to sshd, to allow
chroot operation without support files. A
"no-user-rc" option was added to
~/.ssh/authorized_keys to disable execution of
~/.ssh/rc in public key authentication. An sftp
protocol extension, "email@example.com",
was added to provide a rename operation with POSIX