IPS 特征更新和其他所有Cisco IPS 及IDS 特征都公布在Cisco.com 上网址是
http://www.cisco.com/kobayashi/sw-center/ciscosecure/ids/crypto/
attack-drop.sdf 文件可从以下网址下载http://www.cisco.com/cgi-bin/tablebuild.pl/ios-sigup