This signature checks Modbus packets for function codes that are designated as reserved function code ranges and alert if there is a match.The following is the function code and sub codes that are resereved:8/19, 8/21-65535, 9, 10, 13, 14, 41, 42, 90, 91, 125, 126 and 127You are entitled to use this signature only if you have purchased an IPS SCADA Signature License.
LEGAL DISCLAIMER THE INFORMATION ON THIS PAGE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION CONTAINED HEREIN, OR MATERIALS LINKED FROM THE DOCUMENT, IS AT YOUR OWN RISK. INFORMATION IN THIS DOCUMENT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.