and you will not need to type the -p in ssh or other programs that use ssh, like rsync, when accessing your host.
= Other Techniques =
Other techniques, in some case more advanced, include:
* [http://www.linuxjournal.com/article/8957 Dual-factor authentication]
* [https://www.linux.com/learn/tutorials/351079-weekend-project-secure-your-system-with-port-knocking Port knocking]