The option is called TCPKeepAlive now; see http://bugs.debian.org/349896. I suggest changing this in your configuration file. The version I'll merge from Debian shortly fixes the configuration file for new installs, although unfortunately I've never had a good mechanism for updating the configuration file on upgrades.
-- openssh-server: Manual page sshd_config is missing KeepAlive description https://launchpad.net/bugs/50702 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
