Need to Know More?
You can find more information about configuring network security with ACLs at http://www.cisco.com/en/US/products/hw/switches/ps628/products_configuration_guide_chapter09186a008007e8ed.html.
Look for the Security Recommendation Guide at http://nsa2.http://www.conxion.com/cisco/download.htm.
To learn more about improving security on Cisco routers, visit http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080120f48.shtml.