this week an answer to one of the most FAQ: are my ports open to FSHOST?
To be sure your ports are open to the outside world… download the FSPortTest_1.6.exe from the web (as in the picture).
Run the exe without FSHOST32 or FSHost Client activated!
This is what you should get.
If the test fails, you or your other fellow captains cannot connect to the Multi player session.
Open UDP 6073, 23456, 2300-2400 in your router AND in your firewall.
Source: http://www.chocolatesoftware.com …and send the man a postcard…