Using Sun OTP 2.0, you can harden and unharden the Sun OTP host. Hardening is the process of modifying the SolarisTM operating system configuration to improve the network security of a system. By using the hardening process, you can close the ports and disable the services that might present a security risk to the system. You can unharden, that is, reopen the ports and enable the services that were closed by the hardening process.