Free UTM appliance: firewall, VPN, WAF and antivirus in one ISO.
Securing your network should not require an enterprise budget. CacheGuard is a free open-source network security appliance for startups and growing businesses that need serious protection without the complexity.
Install CacheGuard-OS on any x86 machine or VM and get a complete security gateway in under an hour. No plug-ins, no compatibility issues. Everything works out of the box.
CacheGuard-OS is not an app, it IS the OS. A fully custom network appliance operating system built from...
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...
Secure File Transfer for Windows with Cerberus by Redwood
Protect and share files over FTP/S, SFTP, HTTPS and SCP with the #1 rated Windows file transfer server.
Cerberus supports unlimited users and connections on a single IP, with built-in encryption, 2FA, and a browser-based web client — all deployable in under 15 minutes with a 25-day free trial.
A firewall is used to control access to services (eg proxy) depending on the time of day, the day and the hosts the requests come from -- as the need may arise in a school or university. A web interface delegates control of activation to authorized users.
Small but complete enviroment for building custom embedded system (x86 and other). Based on the gentoo system and uclibc-embedded project. Ideal for small hardware like WRAP or Soekris.