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Firewalls
A firewall is a hardware or software solution to enforce security policies. In the physical security analogy, a firewall is equivalent to a door lock on a perimeter door or on a door to a room inside of the building - it permits only authorized users such as those with a key or access card to enter. A firewall has built-in filters that can disallow unauthorized or potentially dangerous material from entering the system. It also logs attempted intrusions.
From : www.tecrime.com/0gloss.htm
SINUS Firewall
The SINUS Firewall is a TCP/IP packet filter for the
Linux operating system. It is distributed
under the GNU General Public Licence
and comes with complete source code, as the Linux operating system does.
The SINUS firewall is a free and easy way to protect your network from
the daily threats of the Internet. It does not guarantee perfect security,
however it comes with a wealth of features, including:
- Filtering of all header fields in the IP, TCP, UDP, ICMP, IGMP packets.
- Intelligent RIP and FTP support.
- Easy to understand, text-based configuration.
- Graphical management interface for configuration of several firewalls.
- Dynamic rules, including counters and time-outs.
- Extensive logging, alerting, and counter intelligence.
- Prevention of packet and address spoofing - GNU GPL license.
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