Do you want a Television subscription as well from KPN?

Do you have a VDSL connection of a glas fiber connection?

What type of VPN connections do you use? (L2TP/IPSec, IKE/IPSec, OpenVPN, PPTP, other?)

Do you also have incoming VPN connections to your router or only outgoing?

Topics that might be of interest for you (in Dutch ):

- Use your own router instead of the Experia Box

- Use your own router behind the Experia Box

Thanks for your fast reply! 

I would not take a television subscription.

Regarding the connection, after doing the test on your website, the following came out: “At your address we offer the normal and reliable standard internet via the network of KPN.” so I will presume that there is no glas fiber connection. 

The VPN connections I have are outgoing and the type of VPN connection is OpenVPN for now.

Please note that I am a customer of KPN and, just like you, member of this forum.

So, that's a VDSL connection. Therefore you can't your router directly to the network but, since you don't use incoming IKE/IPSec VPN connections it is no problem to connect your router as DMZ Host of the Experia Box.

So use Google translate (or learn Dutch  ) for the topic Use your own router behind the Experia Box.

Yes, should be VDSL. I have also heard that it is possible to request the implementation of fiber for an area that is not covered. I am not sure how that is supposed to work but someone who uses KPN told me that. 

Setting up DMZ is easy, therefore that should not be a problem, it’s just sad that there is no other way besides this one. 

Thanks alot for your quick answer, it was really helpful!