I'd like my mac to display a reminder with a customized message every time it connects to a certain network.
The network can be distinguished by whether my mac's local IP address falls into a few possible IP address ranges, or whether the connection's gateway is one of three possible IP addresses. The connection could be Wi-Fi or ethernet.
Preferably the reminder would be an alert style notification that has to be manually dismissed, but I'm not wedded to that.
And just so that I don't get inundated with these notifications every time the network connects or disconnects for some random reason, I'd like to set it up so that I only get one of these reminders per day.
Is there a way I can set this up, short of writing my own piece of software?
edit: This question is not a duplicate of this one as I'm looking to see a customized reminder upon connecting to a specific local area network as determined by IP address, regardless of the network adapter used. That question is about being notified when a Wi-Fi network becomes available.