Cisco PIX Firewall Release Notes Version 6.3 Contents This document includes the following sections: • Introduction, page 1 • System Requirements, page 3…

Contents: • Introduction, • System Requirements, • New and Changed Information in Version 6.3, • Important Notes, • Caveats, • Obtaining Documentation, • Obtaining Technical Assistance, • Obtaining Additional Publications and Information. The PIX Firewall delivers unprecedented levels of security, performance, and reliability, including robust, enterprise-class security services such as the following: • Stateful inspection security, based on state-of-the-art Adaptive Security Algorithm (ASA) • Over 100 predefined applications, services, and protocols for flexible access control • Virtual Private Networking (VPN) for secure remote network access using IKE/IPSec standards • Intrusion protection from over 55 different network-based attacks • URL filtering of outbound web traffic through third-party server support • Network Address Translation (NAT) and Port Address Translation Support (PAT). Software Requirements. Version 6.3 requires the following: 1. The PIX Firewall image no longer fits on a diskette. If you are using a PIX Firewall unit with a diskette drive, you need to download the Boothelper file from Cisco Connection Online (CCO) to let you download the PIX Firewall image with TFTP. 2. If you are upgrading from Version 4 or earlier and want to use the Auto Update, IPSec, SSH, PDM, or VPN features or commands, you must have a new 56-bit DES activation key. Before getting a new activation key, write down your old key in case you want to retrograde to Version 4. You can have a new 56-bit DES activation key sent to you by completing the form at the following website: http://www.cisco.com/cgi-bin/Software/FormManager/formgenerator.pl?pid=221&fid=324 3. If you are upgrading from a previous PIX Firewall version, save your configuration and write down your activation key and serial number. Refer to “Upgrading to a New Software Release” for new installation requirements. Maximum Recommended Configuration File Size. For the PIX 525 and PIX 535, the maximum configuration file size limit is increased to 2 MB for PIX Firewall software Versions 5.3(2) and later. For other PIX Firewall platforms, the maximum configuration file size limit is 1 MB. Earlier versions of the PIX 501 are limited to a 256 KB configuration file size. If you are using PIX Device Manager (PDM), we recommend no more than a 100 KB configuration file because larger configuration files can interfere with the performance of PDM on your workstation. While configuration files up to 2 MB are now supported on the PIX 525 and PIX 535, be aware that such large configuration files can reduce system performance. For example, a large configuration file is likely to noticeably slow execution times in the following situations: • While executing commands such as write term and show conf • Failover (the configuration synchronization time) • During a system reload…

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