|  Chapman, David and Andy Fox. Cisco Secure PIX Firewalls . Indianapolis, IN: Cisco Press, 2002. Deal, Richard A. Cisco PIX Firewalls . Berkeley, CA: McGraw-Hill/Osborne, 2002.  See the Cisco PIX Firewall Command Reference, Version 6.2 at http://www.cisco.com/univercd/cc/td/doc/product/iaabu/pix/pix_sw/v_62/cmdref/index.htm. See Using and Configuring PIX Object Groups at http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_tech_note09186a00800d641d.shtml. Read the commands reference, M through R, at http://www.cisco.com/en/US/products/sw/secursw/ps2120/products_command_reference_chapter09186a008010423e.html#1038172. Read "Handling ICMP Pings with the PIX Firewall" at http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_tech_note09186a0080094e8a.shtml. Find out about the turbo ACL Commands, A through B, at http://www.cisco.com/en/US/products/sw/secursw/ps2120/products_command_reference_chapter09186a0080104239.html#1054473. | 