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In order to upgrade the PIX Firewall software, use the latest version of tftpd32 (TFTP server for the upgrade procedure).
You can download the latest PIX Firewall images from the Cisco PIX Security Appliance Software Download page.
Refer to Cisco PIX Security Appliance 7.x and ASDM Software Upgrade Procedure for more information on the upgrade procedure.
Refer to Cisco Security Appliance Command Reference, Version 7.2 for detailed information on the commands that can be configured on the PIX 7.x.
