This counter tracks the total number of attacks the Topsec IDS has detected involving suspicious use of IP options fields, such as source routing options that can be abused to bypass normal routing and security controls. An admin monitors this counter to catch attempts to exploit rarely-used IP header options for network reconnaissance or evasion. For example, a rise in idsIpoption detections could indicate an attacker crafting packets with loose or strict source-routing options to probe internal network paths.