dlkern downloads the current stable/beta/prepatch Linux kernel and its signature, and verifies the signature via GnuPG.pm. Versions are specified on the command line as -s (stable), -b (beta), or -p (pre-patch) (all 3 may be specified at once). Downloads are done via ncftpget, wget, or Net::FTP. It allows specification of 2-letter country code for the kernel mirror system, and selection of compression format (.gz/.bz2).
Email Security through Procmail (the Procmail Sanitizer) provides methods to sanitize email, removing obvious exploit attempts and disabling the channels through which exploits are delivered. Facilities for detecting and blocking Trojan Horse exploits and worms are also provided.