Based on the facts darkone did write down , i think a scripts based ip checking will do fine
Allthough would be nice if the script wil be included in the default install package.
Anyway hardcode ip checking as a config option which wil be disabled as default wouldnt be very bad to.
Atleast the customer will be able to choose what he wants either hardcoded or scriptbased.
Ip checking is a important security issue anyway
