Internet Direct (Indy) Version 9.0.1 Beta
TIdIcmpClient.Protocol
Specifies the ICMP Internet Protocol for the socket connection.

property Protocol;
Description
Protocol identifies the Internet Protocol used by the socket connection. TIdIcmpClient uses the value Id_IPPROTO_ICMP as defined in IdStackConst.pas. The default value of Protocol is assigned in the Create constructor. Do not change the value of Protocol, or the communications link may not function properly.