Can anyone help modify this Datasource to be able to use any port?

If you only need to check one port per device, you could swap out the hardcoding with a reference to a property, and then set that property accordingly. You could even get a bit fancy and have it default to 443 if the property you're asking for does not exist.

// This is directly from a Jabber DS I wrote years ago. If my.port does not exist, it defaults to 443.
port = hostProps.get("my.port") ?: "443"


// the other one is messier, I would do this:
my_port = hostProps.get("my.port") ?: "443"
if(port == my_port) {