I booted Mario Kart Wii up after having not played it online for a few months. I went to my Wii's homebrew channel and ran the auto patcher, starting up the game. Once I go to play online, I connect successfully and am able to pick a character. But, after about 30 seconds (usually enough time for me to get to the "searching for match" screen) I get booted out to the main menu and given the error 86030. How can I fix this? As I said, it was working a few months ago.

Unfortunately I cannot. I am not in charge of my network and am unable to do that.

Edit: Is there a way I can check if my router is blocking it?