New motherboard, slow playing

[rbeatse]

I found this forum post

Plex Media Server - Local Network Streaming Slow/Not Working

It sounds like direct access is not possible in the local network. If there are no virtual network adapters in your system, you might have some issues with your router/DNS server/firewall. change the DNS server for your local network to use one of Google’s (8.8.8.8 and/or 8.8.4.4) [this is in your router’s config menu] The reason for this is that the DNS servers which are assigned to your connection be default are sometimes poorly supporting the .direct TLD. Look for a setting called ‘DNS re…

But I have an Xfinity Gateway and can’t change the DNS settings. The “Treat WAN IP and LAN was already set. I have rebooted once but will try again.