... Cataloging-in-Publication Data Hucaby, David. Cisco ASA, PIX, and FWSM firewall handbook / Dave Hucaby. 2nd ed. p. cm. Earlier ed. published under title: Cisco ASA and PIX firewall handbook. ISBN 978-1-58705-457-0 ... Messages"— Provides a quick reference to the many logging messages that can be generated from an ASA, PIX, or FWSM firewall. How to Use This Book The information in this book follows a quick-reference ... examine or track the state of ICMP traffic between two machines. However, beginning with ASA 7.0(1) and FWSM 3.1(1), a firewall can track the state of ICMP packet exchanges, offering an approximation...