CacheGuard Gateway is a UTM, a WAF, and a QoS management appliance.
CacheGuard Gateway is a simple internet security solution for startups, small businesses and SMEs that need strong protection without complexity. A free, open-source Unified Threat Management (UTM) platform for quick deployment and easy management.
Download CacheGuard-OS and install on bare-metal or a virtual machine. In minutes, you get a complete security gateway protecting your network at no cost.
Includes firewall, web antivirus, VPN, URL filtering, and SSL-inspecting web proxy in...
MailCleaner Open Source Edition is now discontinued but will continue under the spamtagger project
https://github.com/SpamTagger
[antispam] MailCleaner is an anti-spam / anti-virus filter SMTP gateway with user and admin web interfaces, quarantine, multi-domains, multi-templates, multi-languages. Using Bayes, RBLs, Spamassassin, MailScanner, ClamAV. Based on Debian. Enterprise ready.
MailCleaner is an anti spam gateway installed between your mail infrastructure and the Internet.
It...
a secure, open source OS for use inside USEagency facilities
A secure and open source operating system. All communications that reasonably can be will be encrypted. It will also have fined-tuned firewall capabilities, with a default policy of deny all inbound except HTTP HTTPS and SSH. Web browser will be sand boxed from other parts of the OS. In order to access saved passwords, cache, cookies, ect in web browser, username/password are required. Downloaded files (and any other files entering the system) will be subjected to both an exception-based and...