Looking for opponents [matchmaking]

[Eckerslyke]

Do I have to change these settings on my router?
I thought Hamachi does what is necessary?

I cannot say, HaPe  I don't know what kind of service you have.  Not all ISPs will permit changes of this nature to be made.

I would suggest that you make the other (non-router) modifications first, (Section B onwards), and try to get a network battle going to see if it works.  If it doesn't, then you can change the router settings.

Good luck!