Originally posted by Kejsaren:

Originally posted by SubsidedLemon:

He can go to www.whatismyip.com (DONT publicly share the IP here though and be cautious who you share your IP with).

Default Valheim port is 2456 (if he has not changed that this'll work)

So to join you'd have to fill in his IP adress and add :2456 to it. It'll look like:
123.456.789:2456

Thanks, we will try that the next time we try to play together.