What Kind Of Firewall In The Amg1302-T10B/Amg1202-T10B; Why Do You Need A Firewall When Your Router Has Packet; Filtering And Nat Built-In - ZyXEL Communications AMG1202-T10B Support Notes

communicate with secure systems by mean of a proxy. A key drawback of this
device is performance.
Stateful Inspection Firewalls restrict access by screening data packets against
defined access rules. They make access control decisions based on IP
address and protocol. They also 'inspect' the session data to assure the
integrity of the connection and to adapt to dynamic protocols. The flexible
nature of Stateful Inspection firewalls generally provides the best speed and
transparency, however, they may lack the granular application level access
control or caching that some proxies support.

4. What kind of firewall in the AMG1302-T10B/AMG1202-T10B?

1. The AMG1302-T10B/AMG1202-T10B's firewall inspects packets
contents and IP headers. It is applicable to all protocols that understand
data in the packet is intended for other layers, from network layer up to
the application layer.
2. The AMG1302-T10B/AMG1202-T10B's firewall performs stateful
inspection. It takes into account the state of connections it handles so
that, for example, a legitimate incoming packet can be matched with the
outbound request for that packet and allowed in. Conversely, an
incoming packet masquerading as a response to a nonexistent
outbound request can be blocked.
3. The AMG1302-T10B/AMG1202-T10B's firewall uses session filtering,
i.e., smart rules, that enhance the filtering process and control the
network session rather than control individual packets in a session.
4. The AMG1302-T10B/AMG1202-T10B's firewall is fast. It uses a
hashing function to search the matched session cache instead of going
through every individual rule for a packet.
5. The AMG1302-T10B/AMG1202-T10B's firewall provides email service
to notify you for routine reports and when alerts occur.

5. Why do you need a firewall when your router has packet

filtering and NAT built-in?

With the spectacular growth of the Internet and online access, companies that
do business on the Internet face greater security threats. Although packet filter
and NAT restrict access to particular computers and networks, however, for
the other companies this security may be insufficient, because packets filters
typically cannot maintain session state. Thus, for greater security, a firewall is
considered.
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AMG1202-T10B/AMG1302-T10B
Support Notes
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