TrinityOS is a step-by-step, example-driven HOWTO on building a very functional Linux box with strong security in mind. TrinityOS is well known for its strong packet firewall ruleset, Chrooted and Split DNS (v9 and v8), secured Sendmail (8.x), Linux PPTP, Serial consoles and Reverse TELNET, DHCPd, SSHd, UPSes, system performance tuning, the automated TrinityOS-Security implementation scripts, and much more.
adlook (Address Lookup tool) is a multi-threaded host name and technical contact lookup tool. It accepts a list of IP addresses from the command line, from a data file, or from stdin, and outputs the hostname and technical contact for each address. Although it is written in Python, for the time being it runs only on UNIX systems. Python must have been compiled with threads enabled to run adlook.
GNU Privacy Guard DNS Keyserver Client enables sending and retrieving OpenPGP keys with GnuPG to and from DNS-based keyservers. DNS-based keyservers offer several advantages over traditional HTTP-based ones, such as distributed caching, server fail-over, and geographical optimal server selection, etc.
This project is a DNS-based server front-end to the CryptNET OpenPGP keyserver, used by GnuPG (with the DNS plugin) to locate and retrieve OpenPGP certificates. DNS-based keyservers offer several advantages over traditional HTTP-based ones, such as distributed caching, server fail-over, and geographical optimal server selection, etc.
redWall is a bootable CD-ROM firewall which focuses on Web-based reporting of the firewall's status. It includes Snort, snortsam, dansguardian, and support for fwbuilder, squidguard, reporting (using BASE/sarg/ntop/webfwlog), VPN (Openswan/PoPToP/Openvpn), Spam Filtering (spamassassin, dcc, razor2, clamav, amavis-new, dspam and maia mailguard), and mail-based, alerting. Configuration data are stored on a floppy or USB disk.
ProviderTool Internet server administration program with email protection. The software is divided into a subcomponent Admin Tool, Customer Tool, and a Reseller Tool. Each subcomponent tool manages a separate zone that is setup for the specific needs of your administrator, end user, and reseller. If you have a Red Hat, SuSE, or Debian Internet or intranet server, you will be able to add, delete, and change settings and users with just a couple of clicks. ProviderTool is delivered with a separate Apache and PHP server environment. There is also an email protection tool included.