Stateful Firewall - Siemens 5935 User Manual

SIEMENS 5930/5935 Business Gateway
User's Guide

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
Dropped Packets
Firewall Rules
SIEMENS
Configure settings that control how the Stateful Firewall
performs.
View the most recent dropped packets.
Configure Stateful Firewall rules.
Chapter 6 Security Setup
Stateful Firewall
65