Hade samma problem, löste det väldigt kvickt genom att googla. Kanske inte fungerar för er, men fungerade utmärkt för mig!
http://www.gameconnect.net/content/9...peeds-ps4-try/
"Changing DNS servers
To change your DNS servers you can either enter new ones in your Routers configuration or on the console. In both cases you can use either Googles DNS servers (8.8.8.8 and 8.8.4.4) or the ones provided by OpenDNS (208.67.222.222 and 208.67.220.220). OpenDNS even has some other interesting additions for DNS, like blocking and protecting ‘dangerous’ websites that include spyware.
The best way is ofcourse to change this on your internet Router itself (most of the times by going to 192.168.1.1 in your web browser and finding a page where you can enter DNS servers manually). If it’s set in the router, it will be used for all your Network equipment and you want have to change anything on your console or other hardware.
But if you want to do it only on the console itself, here are the steps for the PS4:
1. Press the PlayStation Button
2. Select Settings
3. Select Network
4. Select Set Up Internet Connection
5. Select either WiFi or LAN Cable (best is ofcourse Cable)
6. Select Custom, Manual, Choose either Easy or Manual
7. Once you get to the DNS Settings, enter in the Primary and Secondary DNS server address of one of the two DNS Servers as mentioned above.
Now that you have entered the new DNS Servers, proceed through to the end of the set-up process and confirm the changes by running the suggested Internet Connection Test. After this, try downloading something that was taking a very long time before to download, prior to the changes to see if there’s any difference."