Siemens BUSINESS CLASS 5935 - Manual (Page 71)

SIEMENS 5930/5935 Business Gateway
User’s Guide Chapter 6 Security Setup
Stateful Firewall
SIEMENS 65
Stateful Firewall
Stateful Firewall varies from the IP Filtering Firewall in that it gathers and maintains state information about
each session. IP Filtering Firewall examines the packet’s header information and matches it against a set of
defined rules. If it finds a match, the corresponding action is performed. If not, the packet is accepted. Stateful
firewall intercepts outgoing packets and gathers information from them (for example IP address information,
port number) to create state information for that session. When an incoming packet is received, the Stateful
Firewall checks the packet against the state information it has maintained and accepts the packet if the packet
belongs to the session.
This section describes how to perform the following tasks.
Configure Stateful Firewall Configure settings that control how the Stateful Firewall
performs.
Dropped Packets View the most recent dropped packets.
Firewall Rules Configure Stateful Firewall rules.