icm/host_name_full 
Use
You use this parameter to specify the fully qualified host name of the host on which the ICM is running, and which can be contacted for requests. For example, ls3022.wdf.sap-ag.de instead of ls3022.
If this parameter is not set, the system queries the operating system for the host name. With several host names, this parameter can override this value.
Properties
Work area |
Internet Communication Manager |
Unit |
Character string |
Standard value |
- |
Dynamically changeable |
No |
Value Range and Syntax
The character string is the fully-qualified name of the ICM host.
Example
A host has the two fully qualified host names saphost.sap.com and ls12345.sap.com. If the parameter is not set, the operating system uses the name ls12345.sap.com because this is the first one in etc/hosts. If, however, you want the host to be addressed externally by the name saphost.sap.com, set parameter:
icm/host_name_full = saphost.sap.com.
If you want
to address the host using a completely different name, you can use the
following mechanisms of the 
Internet Communication
Framework: