Hey @hazallen as you are on the same network can you check your Nat type is set to open, your friends will need to do the same. I would also suggest ensuring that you are all on the same internet protocol. For example, if you are on IPv4 and they are on IPv6 then you can have issues.

If it's still not fixed can you try:

• Log into your modem / router
• Turn OFF UPNP.Turn off PC UPnP Service:Press: Windows-button a window should pop up. Write: “services.msc” (without the “) then press enter
• In the list of services, scroll down to “UPnP Device Host”, click it and press “Stop service”. Now do the same thing but with the service “SSDP Discovery”.Exit the window and go to control panel-> Network and Internet-> Network and Sharing Centre-> Change advanced sharing settings (to the left)-> Under “network discovery” select to turn off network discovery
• Save your changes

Still not working after this? Can you go ahead and on your console manually set your DNS so that it uses the Google DNS settings. You need to set them to 8.8.8.8 and 8.8.4.4.

Let me know how you get on.

Darko