Hosting/invitation Issues And Firewall Udp Ports

[Rawzberry]

So I have been playing for over a week now, and I've always had this error message when I login saying something about my firewall or wtv. 

 

 

I've always ignored it, because I don't really know what to do about it anyways, and nothing ever really happened. However, yesterday, whenever I tried to invite someone and host, they would receive a ''Failure to Join Session''. I wasn't able to invite anyone. 

 

Now, today, I CAN host and invite people, but I cannot BE invited anymore. Whenever someone invites me, I receive a message saying ''Failure to join Session''. 

 

Also, today, Iv'e hosted a bunch of missions, and usually when there is only myself and 2 other players, I have no problems. However, most of the time, whenever I try hosting 4 players, I get kicked out before the match even starts while the other 3 players are sent into the game. Message that follows saying ''You have been disconnected from the host''. (I'm the host, though...)

 

This is getting on my nerves, and I'm not the techy type, so if anyone could guide me through this, it would be awesome. Thank you!

Edited March 23, 2014 by Rawzberry

[Rawzberry]

Today, I can be invited, but I cannot invite. 

 

SO:

 

Friday - Wasn't able to invite but could be invited

Saturday - Could invite but couldn't be invited (+ i would be kicked out of my own session if there were more then 3 players)

Today - Can't invite but can be invited

 

This is definitely weird.

 

 

EDIT:

 

5 hours later, the problem is reversed. I can now invite and host, but I can't be invited anymore. I'm getting annoyed.

Edited March 23, 2014 by Rawzberry

[Rawzberry]

Still having this problem.