Lets have a look at the list of the products below -
Endian
deliver an open source UTM firewall which consists of stateful packet
inspection, application layer proxy for protocols including HTTP, FTP, POP3,
SMTP. The UTM firewall also supports anti-spam security, web content filtering
and VPN functionality based on OpenSource VPN.
Untangle is another
such product, Which I personally prefer. This has a lite version, available for
free and loaded with all the UTM features. Anyone would expect from a firewall
coming free of cost.
Moonwall
provide a firewall based on FreeBSD and a combination of other software
utilities.
pfSense is a free open source firewall and router. This is
one software with very low hardware requirement.
Shorewall firewall is a tool designed to configure
Netfilter.
Smoothwall Express is an open source firewall based on a
hardened GNU/Linux OS.
Sophos firewalls (formally Astaro) are offered in
appliance, software and virtual based platforms. Sophos is a well regarded
security vendor and provides complete UTM functionality within their Astaro
range of firewall devices. Sophos offer a free version of their firewall where
you can deploy the basic firewall in your environment for free. Modules can
then be purchased if other features are required such as content filtering and
VPN.
StillSecure deliver a software based firewall solution
known as Cobia. Cobia can be installed on VMware as well. Cobia includes the
ability to perform Routing, DHCP, DNS, Wireless, Firewall, VPN, Content
Filtering, Reporting and more. Cobia can use modules provided by StillSecure or
other third party organisations and developers. Cobia software comes as a
public community license and a commercial use license. Via the StillSecure
Community License, users can freely download and modify the source code.
Vyatta
Core is an open source firewall offering IPv4 and IPv6 routing, intrusion
prevention , stateful firewalling, IPSec and SSL OpenVPN and more. A commercial
version is also available at http://www.vyatta.com/.
Zeroshell
is a Linux based firewall. The firewall has some good functionality such as the
ability to load balance internet connections, integrate with LDAP, captive
portal for web login authentication and more.
Zorp
is an application layer firewall based on the Python scripting language.
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