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Patching the System (cont.)
Delete extraneous users (like uucp) from /etc/passwd. Inactive users should have a * in field 2 of /etc/passwd and the shell set to /bin/false.
Install Pretty Good Privacy (pgp) and/or GNU Privacy Guard (gpg), since many of the security packages are signed. Make sure you get the detached sig file and keys.
Set up Secure Shell.
This will give you secure access to the rest of the network.
Compile with tcp-wrappers support and without rsh.