Op 	 Example and documentation
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Attribute = Value
    Not allowed as a check item for RADIUS protocol attributes. It is allowed for server configuration attributes (Auth-Type, etc), and sets the value of on attribute, only if there is no other item of the same attribute. 

    As a reply item, it means "add the item to the reply list, but only if there is no other item of the same attribute. 

 := 	

Attribute := Value
    Always matches as a check item, and replaces in the configuration items any attribute of the same name. If no attribute of that name appears in the request, then this attribute is added. 

    As a reply item, it has an identical meaning, but for the reply items, instead of the request items. 

== 	

Attribute == Value
    As a check item, it matches if the named attribute is present in the request, AND has the given value. 

    Not allowed as a reply item. 

+= 	

Attribute += Value
    Always matches as a check item, and adds the current attribute with value to the list of configuration items. 

    As a reply item, it has an identical meaning, but the attribute is added to the reply items. 

 != 	

Attribute != Value
    As a check item, matches if the given attribute is in the request, AND does not have the given value. 

    Not allowed as a reply item. 

> 	

Attribute > Value
    As a check item, it matches if the request contains an attribute with a value greater than the one given. 

    Not allowed as a reply item. 

>= 	

Attribute >= Value
    As a check item, it matches if the request contains an attribute with a value greater than, or equal to the one given. 

    Not allowed as a reply item. 

< 	

Attribute < Value
    As a check item, it matches if the request contains an attribute with a value less than the one given. 

    Not allowed as a reply item. 

<= 	

Attribute <= Value
    As a check item, it matches if the request contains an attribute with a value less than, or equal to the one given. 

    Not allowed as a reply item. 

=~ 	

Attribute =~ Expression
    As a check item, it matches if the request contains an attribute which matches the given regular expression. This operator may only be applied to string attributes. 

    Not allowed as a reply item. 

 !~ 	

Attribute !~ Expression
    As a check item, it matches if the request contains an attribute which does not match the given regular expression. This operator may only be applied to string attributes. 

    Not allowed as a reply item. 

=* 	

Attribute =* Value
    As a check item, it matches if the request contains the named attribute, no matter what the value is. 

    Not allowed as a reply item. 

 !* 	

Attribute !* Value
    As a check item, it matches if the request does not contain the named attribute, no matter what the value is. 

    Not allowed as a reply item.