rodnocle: Hi,

Maybe this helps someone

1) Port Forward the port 24642 tcp&udp on your router to your PCs internal IP address. The address
can be found by by
pressing Windows+r >
type 'cmd' then press enter >
type 'ipconfig' then press enter > f
find IPv4 address : 192.168.1.xxx or similar.

2) Find your External IP address: go to google type in "what's my ip address" there should be a little window
saying "Your public ip address is xxx.xxx.xxx.xxx"

3) Start stardew > coop > host a farm , send your friend your public ip address + the port you forwarded so :
xxx.xxx.xxx.xxx:24642

4) Your friend should click on join > join lan > enter the ip xxx.xxx.xxx.xxx:24642 and be able to join

Hope that helps