The gotcha we had was a blip in not reading the fine manual (upper case on the callsign folks!).
Also, if you have a Windows client, the dhcp client kinda stinks... Do this:
Might not be bad (as you are using Windows), to flush the dns cache as well
By the way, pppoe works over D-Star as well using the same thin client setup (Linux box) hanging off the repeater.
Looks like Windows 10 still has this issue - to get to the network connections quickly run ncpa.cpl to change the dns servers before the flush.