A firewall is your first line of defense
against Internet security threats. It acts as the gatekeeper
to keep hackers on the Internet from accessing data on your
network. However, all firewalls are not the same. The key
differences in firewalls are the amount and quality of
information used to make decisions. The more information
collected, the more security the firewall delivers.
Packet Filtering Firewalls
A packet filtering firewall simply examines the packet header
and decides whether or not to let the packet proceed.
Decisions are made in accordance with a set of rules or
filters. The inability of packet filtering to dig deeper into
the packet exposes your network to Denial of Service (DoS), IP
Spoofing, and a host of prevalent Internet attacks. Most
broadband routers include packet filtering firewalls along
with IP networking features like NAT (Network Address
Translation), and DHCP (Dynamic Host Configuration Protocol)
to share broadband Internet connections. While these functions
make it easy to connect a network to the Internet, they do
little to improve the security of the connection since hackers
can easily bypass NAT to gain access to your network.
Stateful Packet Inspection Firewalls
A stateful packet inspection firewall intercepts packets until
it has enough to make a determination as to the state of the
attempted connection before passing judgment. By maintaining a
table of current connections and their most recent events,
these firewalls are able to spot abnormal sequences inherent
in hacker attacks. Stateful packet inspection is the most
trusted firewall technology and is widely used in
enterprise-class firewalls.
SonicWALL Internet Security Appliances
SonicWALL Internet Security Appliances deliver
enterprise-class security for your business network.
- ICSA-certified, Stateful Packet
Inspection Firewall. Adheres
to industry standards and uses the most advanced technology
to provide hardened firewall protection
- Complete Network Protocol Support.
Supports NAT, DHCP, and PPPoE (Point-to-Point Protocol over
Ethernet) for easy deployment without sacrificing security
- Intuitive Web Management
Interface. Includes easy-to-use Web management interface
and wizards for quick installation
- Comprehensive Security.
Provides everything you need to protect your network
including seamless support for SonicWALL security
applications, such as Network Anti-Virus and IPSec VPN
- AutoUpdate Security. Keeps
your firewall security up to date with SonicWALL's automatic
security updates
Here's How it Works
Get Protected
Want more information on firewall technology or a wide range
of other network security topics? Explore our White Papers for
in depth information on just the topic you're looking for. To
find out more about how SonicWALL Internet security appliances
can deliver cost-effective, hardened firewall security for
your network, please contact
us.
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