Tomas Macek wrote: > I know, that I can use "illegal_object_name_chars" option in icinga.cfg > and I have there: "`~!$%^&*|'"<>?,()=". It's the default value. > But the question for me is why shouldn't I just to leave this option > blank? Why should I restrict the short name of the host name or service > name?
imagine what such characters could cause in an interpreter / a shell being called by the given macros you are using in your commands. http://docs.icinga.org/latest/en/configmain.html#configmain-illegal_object_name_chars the illegal macro chars only affect the macros which are dynamically generated by external input (such as a check or a comment (author)) and not being read from the configs. > The documentation says "When used properly, the $HOSTNAME$ macro will > contain this short name.". What means the "properly"? given the examples above, you will learn that removing the ' from the illegal object name chars will let define the following. define host { name foo'bar ... check_command check_foo } define command { name check_foo command_line /bin/echo '$HOSTNAME$' } will result in the command - see raw command line https://wiki.icinga.org/display/testing/Icinga+Plugin+Testing $ /bin/echo 'foo'bar' run that and see yourself. so given the example, you will most likely understand that such basic object attributes being reused as macros on commands (checks, notifications, eventhandlers) can cause *dangerous* things and it is NOT advised to blank this option. kind regards, michael -- DI (FH) Michael Friedrich Vienna University Computer Center Universitaetsstrasse 7 A-1010 Vienna, Austria email: michael.friedr...@univie.ac.at phone: +43 1 4277 14359 mobile: +43 664 60277 14359 fax: +43 1 4277 14338 web: http://www.univie.ac.at/zid http://www.aco.net Lead Icinga Core Developer http://www.icinga.org ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ icinga-users mailing list icinga-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/icinga-users
