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Cisco PIX Firewall and VPN Configuration Guide

78-15033-01

Chapter 1 Getting Started

Using the Command-Line Interface

Configuration Size

For PIX Firewall Version 5.3(2) and higher, the PIX 525 and PIX 535 support configurations up to 2 MB.

The maximum size for the PIX 501 is 256 KB. The maximum configuration size for all other

PIX

Firewall platforms is 1 MB. For PIX Firewall models using software before Version 5.3(2), the

maximum configuration size is 350 KB.

Note Regardless of the platform, smaller configuration sizes are recommended to ensure optimum

performance.

Use the UNIX wc command or a Windows word processing program, such as Microsoft Word, to view

the number of characters in the configuration.

Help Information

Help information is available from the PIX Firewall command line by entering help or a question mark

to list all commands, or after a command to list command syntax; for example,

arp?.

The number of commands listed when you use the question mark or help command differs by access

mode so that unprivileged mode offers the least commands and configuration mode offers the greatest

number of commands.

In addition, you can enter any command by itself on the command line and then press Enter to view the

command syntax.

Viewing the Default Configuration

When you power on your PIX Firewall for the first time, the configuration comes with many of the basic

commands required to get started. The configuration you first receive is known as the default

configuration. You can use the write terminal command to view your configuration at any time. Also

use the write memory command frequently to save your configuration to Flash memory.

Resetting the Default Configuration

If you make a mistake configuring a PIX 501 or PIX 506/506E, or need to restore the default

configuration for any reason, enter the following command:

config factory default [inside-ip-address [address-mask]]

This command writes the factory default configuration to memory. If you specify the optional

inside-ip-address and address-mask parameters, the command adjusts the default configuration based on

the specified IP address and subnetwork mask.

If you enter this command on other PIX Firewall platforms that do not support it, you will receive the

following message:

The config factory default command is only supported on the PIX 501 or PIX 506E.

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