Hi @FredericHebert , please open a new question even if on the same topic of this question, because in this way, you'll have more attention from more people and the a quicker an maybe better answer. Anyway, I usually use sourcetype in props.conf , but you can also use host or source but with a little different format: [host::<your_host>] or [source::<your_source>] For my knowledhe it isn't possible to define a validity period for a conf file: you should manually (or using a scheduled shell script) modify a conf file and restart the Heavy Forwarder, in my opinion isn't an efficient solution! Ciao. Giuseppe ... View more