Since i moved out to new apartment i have an issue with playing with other people. I can play 1v1, but when more people joins, i conflict with them. Need help how to fix it
Does your game work fast (no lags) 1v1?
Conflict problem is difficult. It's not related to port forwarding (NAT, DMZ). It's also not related to DNS. It's generally not related to software.
The most possible problem is your internet connection provider.
Also, D-link DI-524 is not perfect router (while using default firmware). Is that possible for you to attach internet cable directly to your local computer for test purposes? That could be a good try before changing your provider.