I recently upgraded to VDSL and had to purchase a VDSL router. The only router that was readily available was a PACE VDSL router model 921VNX.
The problem is that I am now unable to connect to machines on my network from my Linux machines. I received a reply from an external URL when pinging a machine on my internal network.
After some research I found that it’s a known issue with the Pace routers. Some people advised that a firmware update resolved this for them but I already have the latest firmware update.
The video below shows how to get around it by editing your hosts file in Linux Mint.
Note: my Windows 8 PC’s could browse the network fine and connect to the other machines using the host name.