First of all sorry for my bad english,
I have a problem with the Host Unreachable;
I open all the ports that you say in this post: http://steamcommunity.com/app/298610/discussions/2/1620599015865077154/.
But the problem persist, i have done a lot of test and i think that the posible solution maybe is the time out when you enter to a server, when the server is new created i can enter without problems very fast because there are a few entities only, but when the server have more entities and i try to enter when i arrive always to 25 seconds more or less i always get the message "Host Unreachable", i try a lot of times entering and always more or less 25 sec latter i get the error.
Sometimes load to 55%, other times to 60% but all the times after same time in seconds, so the problem i think that maibe is the time out, of course the other problem is my bad connection i have only 3MB but i can play to other games withouth problems.
can you check this?is posible to test with more time?Thanks a lot!