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10-9
Cisco ASA 5500 Series Configuration Guide using ASDM
Chapter 10 Configuring the Transparent or Routed Firewall
Configuring ARP Inspection for the Transparent Firewall
Detailed Steps
Feature History for Firewall Mode
Table 10-2 lists the release history for each feature change and the platform release in which it was
implemented.
Configuring ARP Inspection for the Transparent Firewall
This section describes ARP inspection and how to enable it and includes the following topics:
• Information About ARP Inspection, page 10-10
• Licensing Requirements for ARP Inspection, page 10-10
• Default Settings, page 10-10
• Guidelines and Limitations, page 10-10
• Configuring ARP Inspection, page 10-11
• Feature History for ARP Inspection, page 10-13
Command Purpose
firewall transparent
Example:
hostname(config)# firewall transparent
Sets the firewall mode to transparent. To change the mode to routed, enter
the no firewall transparent command.
Note You are not prompted to confirm the firewall mode change; the
change occurs immediately.
Table 10-2 Feature History for Firewall Mode
Feature Name Releases Feature Information
Transparent firewall mode
7.0(1) A transparent firewall is a Layer 2 firewall that acts like a
“bump in the wire,” or a “stealth firewall,” and is not seen as
a router hop to connected devices.
We introduced the following commands: firewall
transparent, show firewall.
You cannot set the firewall mode in ASDM; you must use
the command-line interface.
Transparent firewall bridge groups
8.4(1) Multiple bridge groups are now allowed in transparent
firewall mode. Also, you can now configure up to four
interfaces (per bridge group); formerly, you could only
configure two interfaces in transparent mode.
We introduced the following commands: firewall
transparent, show firewall.
You cannot set the firewall mode in ASDM; you must use
the command-line interface.