To start/stop sshd service, you must use "root" account"
System startup configuration file/etc/rc.config.d/sshd
Stop HP UX SSH Service
/sbin/init.d/secsh stop
Start HP UX SSH Service
/sbin/init.d/secsh start
If /sbin/init.d/secsh is not found, you can try the following if found
/sbin/init.d/S91sshd start