Stateful firewall – Siemens se5880 User Manual
Page 63
SIEMENS se5880 Ethernet Security Router
User’s Guide
Chapter 6 Security Setup
Stateful Firewall
SIEMENS
57
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 settings that control how the Stateful Firewall
performs.
View the most recent dropped packets.
Configure Stateful Firewall rules.