GEN:SID 1:475
Message ICMP traceroute ipopts
Summary This event is generated when a network host generates an ICMP datagram
with Record Route IP options.
Impact Packets containing IP Record Route options are used to emulate the functionality
of traceroute.
Detailed Information The Record Route IP option is used to store routing information about the
path a datagram takes to its destination.  ICMP ECHO packets with an IP header
utilizing the Record Route option are used to emulate the functionality of
traceroute.
Affected Systems  
Attack Scenarios A remote attacker may attempt to use the Record Route IP option to determine
routing information if traceroute fails.
Ease of Attack Numerous tools and scripts can generate this type of datagram.
Corrective Action Use ingress filtering to block incoming datagrams with the IP Record Route option.
Additional References http://www.whitehats.com/info/IDS238

Rule References arachnids: 238