how to play a map I made with another person

[Mannymon123]

I am wanting to test a map I have made with my brother who is on a different network. Is there a simple way of doing this? I have already tried setting a dedicated server, but it crashed after a minute. Also, when I tried playing the map as a server in tf2, he could not join. I am hoping to have some direction on what to do. I apologize that this is not a question about map making in particular.

 

[Sonoma]

With a recent tf2 update you should be able to create a server for others to play on with the Create Server button, there should be a check box for steam networking, make sure that is enabled. I would set up a password so only people you give it too will be able to join. I would also recommend you send your map's bsp file to people you want to join you